2 # SPDX-License-Identifier: GPL-2.0
4 # (c) 2001, Dave Jones. (the file handling bit)
5 # (c) 2005, Joel Schopp <jschopp@austin.ibm.com> (the ugly bit)
6 # (c) 2007,2008, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite)
7 # (c) 2008-2010 Andy Whitcroft <apw@canonical.com>
8 # (c) 2010-2018 Joe Perches <joe@perches.com>
15 use Term::ANSIColor qw(:constants);
16 use Encode qw(decode encode);
19 my $D = dirname(abs_path($P));
23 use Getopt::Long qw(:config no_auto_abbrev);
25 # ATTENTION: easily track modification to this script for OpenOCD.
26 # When possible, don't modify the existing code, don't change its indentation,
27 # but remove it enclosing it within:
33 # Mark every addition within comments
34 # # OpenOCD specific: Begin[: additional comment]
35 # # OpenOCD specific: End
40 my %verbose_messages = ();
41 my %verbose_emitted = ();
62 my $gitroot = $ENV{'GIT_DIR'};
63 $gitroot = ".git" if !defined($gitroot);
71 my $configuration_file = ".checkpatch.conf";
72 my $max_line_length = 100;
73 my $ignore_perl_version = 0;
74 my $minimum_perl_version = 5.10.0;
75 my $min_conf_desc_length = 4;
76 my $spelling_file = "$D/spelling.txt";
78 my $codespellfile = "/usr/share/codespell/dictionary.txt";
79 my $user_codespellfile = "";
80 my $conststructsfile = "$D/const_structs.checkpatch";
81 my $docsfile = "$D/../Documentation/dev-tools/checkpatch.rst";
84 my $allow_c99_comments = 1; # Can be overridden by --ignore C99_COMMENT_TOLERANCE
85 # git output parsing needs US English output, so first set backtick child process LANGUAGE
86 my $git_command ='export LANGUAGE=en_US.UTF-8; git';
88 my ${CONFIG_} = "CONFIG_";
94 Usage: $P [OPTION]... [FILE]...
99 -v, --verbose verbose mode
100 --no-tree run without an OpenOCD tree
101 --no-signoff do not check for 'Signed-off-by' line
102 --patch treat FILE as patchfile (default)
103 --emacs emacs compile window format
104 --terse one line per report
105 --showfile emit diffed file position, not input file position
106 -g, --git treat FILE as a single commit or git revision range
107 single git commit with:
111 multiple git commits with:
115 git merges are ignored
116 -f, --file treat FILE as regular source file
117 --subjective, --strict enable more subjective tests
118 --list-types list the possible message types
119 --types TYPE(,TYPE2...) show only these comma separated message types
120 --ignore TYPE(,TYPE2...) ignore various comma separated message types
121 --show-types show the specific message type in the output
122 --max-line-length=n set the maximum line length, (default $max_line_length)
123 if exceeded, warn on patches
124 requires --strict for use with --file
125 --min-conf-desc-length=n set the min description length, if shorter, warn
126 --tab-size=n set the number of spaces for tab (default $tabsize)
127 --root=PATH PATH to the OpenOCD tree root
128 --no-summary suppress the per-file summary
129 --mailback only produce a report in case of warnings/errors
130 --summary-file include the filename in summary
131 --debug KEY=[0|1] turn on/off debugging of KEY, where KEY is one of
132 'values', 'possible', 'type', and 'attr' (default
134 --test-only=WORD report only warnings/errors containing WORD
136 --fix EXPERIMENTAL - may create horrible results
137 If correctable single-line errors exist, create
138 "<inputfile>.EXPERIMENTAL-checkpatch-fixes"
139 with potential errors corrected to the preferred
141 --fix-inplace EXPERIMENTAL - may create horrible results
142 Is the same as --fix, but overwrites the input
143 file. It's your fault if there's no backup or git
144 --ignore-perl-version override checking of perl version. expect
146 --codespell Use the codespell dictionary for spelling/typos
147 (default:$codespellfile)
148 --codespellfile Use this codespell dictionary
149 --typedefsfile Read additional types from this file
150 --color[=WHEN] Use colors 'always', 'never', or only when output
151 is a terminal ('auto'). Default is 'auto'.
152 --kconfig-prefix=WORD use WORD as a prefix for Kconfig symbols (default
154 -h, --help, --version display this help and exit
156 When FILE is - read standard input.
164 return grep { !$seen{$_}++ } @_;
174 open(my $script, '<', abs_path($P)) or
175 die "$P: Can't read '$P' $!\n";
177 my $text = <$script>;
181 # Also catch when type or level is passed through a variable
182 while ($text =~ /(?:(\bCHK|\bWARN|\bERROR|&\{\$msg_level})\s*\(|\$msg_type\s*=)\s*"([^"]+)"/g) {
184 if (exists($types{$2})) {
185 $types{$2} .= ",$1" if ($types{$2} ne $1);
190 $types{$2} = "UNDETERMINED";
194 print("#\tMessage type\n\n");
196 print(" ( Color coding: ");
197 print(RED . "ERROR" . RESET);
199 print(YELLOW . "WARNING" . RESET);
201 print(GREEN . "CHECK" . RESET);
203 print("Multiple levels / Undetermined");
207 foreach my $type (sort keys %types) {
208 my $orig_type = $type;
210 my $level = $types{$type};
211 if ($level eq "ERROR") {
212 $type = RED . $type . RESET;
213 } elsif ($level eq "WARN") {
214 $type = YELLOW . $type . RESET;
215 } elsif ($level eq "CHK") {
216 $type = GREEN . $type . RESET;
219 print(++$count . "\t" . $type . "\n");
220 if ($verbose && exists($verbose_messages{$orig_type})) {
221 my $message = $verbose_messages{$orig_type};
222 $message =~ s/\n/\n\t/g;
223 print("\t" . $message . "\n\n");
230 my $conf = which_conf($configuration_file);
233 open(my $conffile, '<', "$conf")
234 or warn "$P: Can't find a readable $configuration_file file $!\n";
236 while (<$conffile>) {
239 $line =~ s/\s*\n?$//g;
243 next if ($line =~ m/^\s*#/);
244 next if ($line =~ m/^\s*$/);
246 my @words = split(" ", $line);
247 foreach my $word (@words) {
248 last if ($word =~ m/^#/);
249 push (@conf_args, $word);
253 unshift(@ARGV, @conf_args) if @conf_args;
257 open(my $docs, '<', "$docsfile")
258 or warn "$P: Can't read the documentation file $docsfile $!\n";
269 if ($line =~ /^\s*\*\*(.+)\*\*$/) {
271 $verbose_messages{$type} = trim($desc);
277 if ($line =~ /^(?:\s{4,}|$)/) {
282 $verbose_messages{$type} = trim($desc);
291 $verbose_messages{$type} = trim($desc);
296 # Perl's Getopt::Long allows options to take optional arguments after a space.
297 # Prevent --color by itself from consuming other arguments
299 if ($_ eq "--color" || $_ eq "-color") {
300 $_ = "--color=$color";
305 'q|quiet+' => \$quiet,
306 'v|verbose!' => \$verbose,
308 'signoff!' => \$chk_signoff,
309 'patch!' => \$chk_patch,
312 'showfile!' => \$showfile,
315 'subjective!' => \$check,
316 'strict!' => \$check,
317 'ignore=s' => \@ignore,
319 'show-types!' => \$show_types,
320 'list-types!' => \$list_types,
321 'max-line-length=i' => \$max_line_length,
322 'min-conf-desc-length=i' => \$min_conf_desc_length,
323 'tab-size=i' => \$tabsize,
325 'summary!' => \$summary,
326 'mailback!' => \$mailback,
327 'summary-file!' => \$summary_file,
329 'fix-inplace!' => \$fix_inplace,
330 'ignore-perl-version!' => \$ignore_perl_version,
331 'debug=s' => \%debug,
332 'test-only=s' => \$tst_only,
333 'codespell!' => \$codespell,
334 'codespellfile=s' => \$user_codespellfile,
335 'typedefsfile=s' => \$typedefsfile,
336 'color=s' => \$color,
337 'no-color' => \$color, #keep old behaviors of -nocolor
338 'nocolor' => \$color, #keep old behaviors of -nocolor
339 'kconfig-prefix=s' => \${CONFIG_},
344 if ($user_codespellfile) {
345 # Use the user provided codespell file unconditionally
346 $codespellfile = $user_codespellfile;
347 } elsif (!(-f $codespellfile)) {
348 # If /usr/share/codespell/dictionary.txt is not present, try to find it
349 # under codespell's install directory: <codespell_root>/data/dictionary.txt
350 if (($codespell || $help) && which("python3") ne "") {
351 my $python_codespell_dict = << "EOF";
355 codespell_dir = op.dirname(codespell_lib.__file__)
356 codespell_file = op.join(codespell_dir, 'data', 'dictionary.txt')
357 print(codespell_file, end='')
360 my $codespell_dict = `python3 -c "$python_codespell_dict" 2> /dev/null`;
361 $codespellfile = $codespell_dict if (-f $codespell_dict);
365 # $help is 1 if either -h, --help or --version is passed as option - exitcode: 0
366 # $help is 2 if invalid option is passed - exitcode: 1
367 help($help - 1) if ($help);
369 die "$P: --git cannot be used with --file or --fix\n" if ($git && ($file || $fix));
370 die "$P: --verbose cannot be used with --terse\n" if ($verbose && $terse);
372 if ($color =~ /^[01]$/) {
374 } elsif ($color =~ /^always$/i) {
376 } elsif ($color =~ /^never$/i) {
378 } elsif ($color =~ /^auto$/i) {
379 $color = (-t STDOUT);
381 die "$P: Invalid color mode: $color\n";
384 load_docs() if ($verbose);
385 list_types(0) if ($list_types);
387 $fix = 1 if ($fix_inplace);
388 $check_orig = $check;
392 my $perl_version_ok = 1;
393 if ($^V && $^V lt $minimum_perl_version) {
394 $perl_version_ok = 0;
395 printf "$P: requires at least perl version %vd\n", $minimum_perl_version;
396 exit(1) if (!$ignore_perl_version);
399 #if no filenames are given, push '-' to read patch from stdin
404 # skip TAB size 1 to avoid additional checks on $tabsize - 1
405 die "$P: Invalid TAB size: $tabsize\n" if ($tabsize < 2);
407 sub hash_save_array_words {
408 my ($hashRef, $arrayRef) = @_;
410 my @array = split(/,/, join(',', @$arrayRef));
411 foreach my $word (@array) {
412 $word =~ s/\s*\n?$//g;
415 $word =~ tr/[a-z]/[A-Z]/;
417 next if ($word =~ m/^\s*#/);
418 next if ($word =~ m/^\s*$/);
424 sub hash_show_words {
425 my ($hashRef, $prefix) = @_;
427 if (keys %$hashRef) {
428 print "\nNOTE: $prefix message types:";
429 foreach my $word (sort keys %$hashRef) {
436 hash_save_array_words(\%ignore_type, \@ignore);
437 hash_save_array_words(\%use_type, \@use);
440 my $dbg_possible = 0;
443 for my $key (keys %debug) {
445 eval "\${dbg_$key} = '$debug{$key}';";
449 my $rpt_cleaners = 0;
458 if (!top_of_kernel_tree($root)) {
459 die "$P: $root: --root does not point at a valid tree\n";
462 if (top_of_kernel_tree('.')) {
464 # OpenOCD specific: Begin: replace s"/scripts/"/tools/scripts/"
465 } elsif ($0 =~ m@(.*)/tools/scripts/[^/]*$@ &&
466 top_of_kernel_tree($1)) {
469 # OpenOCD specific: End
472 if (!defined $root) {
473 print "Must be run from the top-level dir. of an OpenOCD tree\n";
478 my $emitted_corrupt = 0;
481 [A-Za-z_][A-Za-z\d_]*
482 (?:\s*\#\#\s*[A-Za-z_][A-Za-z\d_]*)*
484 our $Storage = qr{extern|static|asmlinkage};
498 our $InitAttributePrefix = qr{__(?:mem|cpu|dev|net_|)};
499 our $InitAttributeData = qr{$InitAttributePrefix(?:initdata\b)};
500 our $InitAttributeConst = qr{$InitAttributePrefix(?:initconst\b)};
501 our $InitAttributeInit = qr{$InitAttributePrefix(?:init\b)};
502 our $InitAttribute = qr{$InitAttributeData|$InitAttributeConst|$InitAttributeInit};
504 # Notes to $Attribute:
505 # We need \b after 'init' otherwise 'initconst' will cause a false positive in a check
528 ____cacheline_aligned|
529 ____cacheline_aligned_in_smp|
530 ____cacheline_internodealigned_in_smp|
532 __alloc_size\s*\(\s*\d+\s*(?:,\s*\d+\s*)?\)
535 our $Inline = qr{inline|__always_inline|noinline|__inline|__inline__};
536 our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
537 our $Lval = qr{$Ident(?:$Member)*};
539 our $Int_type = qr{(?i)llu|ull|ll|lu|ul|l|u};
540 our $Binary = qr{(?i)0b[01]+$Int_type?};
541 our $Hex = qr{(?i)0x[0-9a-f]+$Int_type?};
542 our $Int = qr{[0-9]+$Int_type?};
543 our $Octal = qr{0[0-7]+$Int_type?};
544 our $String = qr{(?:\b[Lu])?"[X\t]*"};
545 our $Float_hex = qr{(?i)0x[0-9a-f]+p-?[0-9]+[fl]?};
546 our $Float_dec = qr{(?i)(?:[0-9]+\.[0-9]*|[0-9]*\.[0-9]+)(?:e-?[0-9]+)?[fl]?};
547 our $Float_int = qr{(?i)[0-9]+e-?[0-9]+[fl]?};
548 our $Float = qr{$Float_hex|$Float_dec|$Float_int};
549 our $Constant = qr{$Float|$Binary|$Octal|$Hex|$Int};
550 our $Assignment = qr{\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=};
551 our $Compare = qr{<=|>=|==|!=|<|(?<!-)>};
552 our $Arithmetic = qr{\+|-|\*|\/|%};
556 &&|\|\||,|\^|\+\+|--|&|\||$Arithmetic
559 our $c90_Keywords = qr{do|for|while|if|else|return|goto|continue|switch|default|case|break}x;
563 our $NonptrTypeMisordered;
564 our $NonptrTypeWithAttr;
568 our $DeclareMisordered;
570 our $NON_ASCII_UTF8 = qr{
571 [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
572 | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
573 | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
574 | \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
575 | \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
576 | [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
577 | \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
581 [\x09\x0A\x0D\x20-\x7E] # ASCII
585 our $typeC99Typedefs = qr{(?:__)?(?:[us]_?)?int_?(?:8|16|32|64)_t};
586 our $typeOtherOSTypedefs = qr{(?x:
587 u_(?:char|short|int|long) | # bsd
588 u(?:nchar|short|int|long) # sysv
590 our $typeKernelTypedefs = qr{(?x:
591 (?:__)?(?:u|s|be|le)(?:8|16|32|64)|
594 our $typeTypedefs = qr{(?x:
596 $typeOtherOSTypedefs\b|
597 $typeKernelTypedefs\b
600 our $zero_initializer = qr{(?:(?:0[xX])?0+$Int_type?|NULL|false)\b};
603 our $logFunctions = qr{(?x:
604 printk(?:_ratelimited|_once|_deferred_once|_deferred|)|
605 (?:[a-z0-9]+_){1,2}(?:printk|emerg|alert|crit|err|warning|warn|notice|info|debug|dbg|vdbg|devel|cont|WARN)(?:_ratelimited|_once|)|
607 WARN(?:_RATELIMIT|_ONCE|)|
610 seq_vprintf|seq_printf|seq_puts
613 # OpenOCD specific: Begin: list log functions
614 our $logFunctions = qr{(?x:
615 LOG_(?:TARGET_|)(?:DEBUG_IO|DEBUG|INFO|WARNING|ERROR|USER|USER_N|OUTPUT)
617 # OpenOCD specific: End
619 our $allocFunctions = qr{(?x:
621 (?:kv|k|v)[czm]alloc(?:_array)?(?:_node)? |
624 (?:\w+)?alloc_skb(?:_ip_align)? |
625 # dev_alloc_skb/netdev_alloc_skb, et al
629 our $signature_tags = qr{(?xi:
641 our $tracing_logging_tags = qr{(?xi:
665 sub edit_distance_min {
667 my $len = scalar @arr;
668 if ((scalar @arr) < 1) {
669 # if underflow, return
673 for my $i (0 .. ($len-1)) {
674 if ($arr[$i] < $min) {
681 sub get_edit_distance {
682 my ($str1, $str2) = @_;
687 my $len1 = length($str1);
688 my $len2 = length($str2);
689 # two dimensional array storing minimum edit distance
691 for my $i (0 .. $len1) {
692 for my $j (0 .. $len2) {
694 $distance[$i][$j] = $j;
696 $distance[$i][$j] = $i;
697 } elsif (substr($str1, $i-1, 1) eq substr($str2, $j-1, 1)) {
698 $distance[$i][$j] = $distance[$i - 1][$j - 1];
700 my $dist1 = $distance[$i][$j - 1]; #insert distance
701 my $dist2 = $distance[$i - 1][$j]; # remove
702 my $dist3 = $distance[$i - 1][$j - 1]; #replace
703 $distance[$i][$j] = 1 + edit_distance_min($dist1, $dist2, $dist3);
707 return $distance[$len1][$len2];
710 sub find_standard_signature {
712 my @standard_signature_tags = (
713 'Signed-off-by:', 'Co-developed-by:', 'Acked-by:', 'Tested-by:',
714 'Reviewed-by:', 'Reported-by:', 'Suggested-by:'
716 foreach my $signature (@standard_signature_tags) {
717 return $signature if (get_edit_distance($sign_off, $signature) <= 2);
723 our @typeListMisordered = (
724 qr{char\s+(?:un)?signed},
725 qr{int\s+(?:(?:un)?signed\s+)?short\s},
726 qr{int\s+short(?:\s+(?:un)?signed)},
727 qr{short\s+int(?:\s+(?:un)?signed)},
728 qr{(?:un)?signed\s+int\s+short},
729 qr{short\s+(?:un)?signed},
730 qr{long\s+int\s+(?:un)?signed},
731 qr{int\s+long\s+(?:un)?signed},
732 qr{long\s+(?:un)?signed\s+int},
733 qr{int\s+(?:un)?signed\s+long},
734 qr{int\s+(?:un)?signed},
735 qr{int\s+long\s+long\s+(?:un)?signed},
736 qr{long\s+long\s+int\s+(?:un)?signed},
737 qr{long\s+long\s+(?:un)?signed\s+int},
738 qr{long\s+long\s+(?:un)?signed},
739 qr{long\s+(?:un)?signed},
744 qr{(?:(?:un)?signed\s+)?char},
745 qr{(?:(?:un)?signed\s+)?short\s+int},
746 qr{(?:(?:un)?signed\s+)?short},
747 qr{(?:(?:un)?signed\s+)?int},
748 qr{(?:(?:un)?signed\s+)?long\s+int},
749 qr{(?:(?:un)?signed\s+)?long\s+long\s+int},
750 qr{(?:(?:un)?signed\s+)?long\s+long},
751 qr{(?:(?:un)?signed\s+)?long},
760 qr{${Ident}_handler},
761 qr{${Ident}_handler_fn},
765 our $C90_int_types = qr{(?x:
766 long\s+long\s+int\s+(?:un)?signed|
767 long\s+long\s+(?:un)?signed\s+int|
768 long\s+long\s+(?:un)?signed|
769 (?:(?:un)?signed\s+)?long\s+long\s+int|
770 (?:(?:un)?signed\s+)?long\s+long|
771 int\s+long\s+long\s+(?:un)?signed|
772 int\s+(?:(?:un)?signed\s+)?long\s+long|
774 long\s+int\s+(?:un)?signed|
775 long\s+(?:un)?signed\s+int|
776 long\s+(?:un)?signed|
777 (?:(?:un)?signed\s+)?long\s+int|
778 (?:(?:un)?signed\s+)?long|
779 int\s+long\s+(?:un)?signed|
780 int\s+(?:(?:un)?signed\s+)?long|
783 (?:(?:un)?signed\s+)?int
786 our @typeListFile = ();
787 our @typeListWithAttr = (
789 qr{struct\s+$InitAttribute\s+$Ident},
790 qr{union\s+$InitAttribute\s+$Ident},
793 our @modifierList = (
796 our @modifierListFile = ();
798 our @mode_permission_funcs = (
800 ["module_param_(?:array|named|string)", 4],
801 ["module_param_array_named", 5],
802 ["debugfs_create_(?:file|u8|u16|u32|u64|x8|x16|x32|x64|size_t|atomic_t|bool|blob|regset32|u32_array)", 2],
803 ["proc_create(?:_data|)", 2],
804 ["(?:CLASS|DEVICE|SENSOR|SENSOR_DEVICE|IIO_DEVICE)_ATTR", 2],
805 ["IIO_DEV_ATTR_[A-Z_]+", 1],
806 ["SENSOR_(?:DEVICE_|)ATTR_2", 2],
807 ["SENSOR_TEMPLATE(?:_2|)", 3],
811 my $word_pattern = '\b[A-Z]?[a-z]{2,}\b';
813 #Create a search pattern for all these functions to speed up a loop below
814 our $mode_perms_search = "";
815 foreach my $entry (@mode_permission_funcs) {
816 $mode_perms_search .= '|' if ($mode_perms_search ne "");
817 $mode_perms_search .= $entry->[0];
819 $mode_perms_search = "(?:${mode_perms_search})";
821 our %deprecated_apis = (
822 "synchronize_rcu_bh" => "synchronize_rcu",
823 "synchronize_rcu_bh_expedited" => "synchronize_rcu_expedited",
824 "call_rcu_bh" => "call_rcu",
825 "rcu_barrier_bh" => "rcu_barrier",
826 "synchronize_sched" => "synchronize_rcu",
827 "synchronize_sched_expedited" => "synchronize_rcu_expedited",
828 "call_rcu_sched" => "call_rcu",
829 "rcu_barrier_sched" => "rcu_barrier",
830 "get_state_synchronize_sched" => "get_state_synchronize_rcu",
831 "cond_synchronize_sched" => "cond_synchronize_rcu",
834 #Create a search pattern for all these strings to speed up a loop below
835 our $deprecated_apis_search = "";
836 foreach my $entry (keys %deprecated_apis) {
837 $deprecated_apis_search .= '|' if ($deprecated_apis_search ne "");
838 $deprecated_apis_search .= $entry;
840 $deprecated_apis_search = "(?:${deprecated_apis_search})";
842 our $mode_perms_world_writable = qr{
850 our %mode_permission_string_types = (
869 #Create a search pattern for all these strings to speed up a loop below
870 our $mode_perms_string_search = "";
871 foreach my $entry (keys %mode_permission_string_types) {
872 $mode_perms_string_search .= '|' if ($mode_perms_string_search ne "");
873 $mode_perms_string_search .= $entry;
875 our $single_mode_perms_string_search = "(?:${mode_perms_string_search})";
876 our $multi_mode_perms_string_search = qr{
877 ${single_mode_perms_string_search}
878 (?:\s*\|\s*${single_mode_perms_string_search})*
884 return trim($string) if ($string =~ /^\s*0[0-7]{3,3}\s*$/);
891 while ($string =~ /\b(($single_mode_perms_string_search)\b(?:\s*\|\s*)?\s*)/g) {
892 $curpos = pos($string);
895 last if ($lastpos > 0 && ($curpos - length($omatch) != $lastpos));
897 $to |= $mode_permission_string_types{$match};
898 $val .= '\s*\|\s*' if ($val ne "");
902 $oval =~ s/^\s*\|\s*//;
903 $oval =~ s/\s*\|\s*$//;
904 return sprintf("%04o", $to);
907 our $allowed_asm_includes = qr{(?x:
913 # memory.h: ARM has a custom one
915 # Load common spelling mistakes and build regular expression list.
919 if (open(my $spelling, '<', $spelling_file)) {
920 while (<$spelling>) {
923 $line =~ s/\s*\n?$//g;
926 next if ($line =~ m/^\s*#/);
927 next if ($line =~ m/^\s*$/);
929 my ($suspect, $fix) = split(/\|\|/, $line);
931 $spelling_fix{$suspect} = $fix;
935 warn "No typos will be found - file '$spelling_file': $!\n";
939 if (open(my $spelling, '<', $codespellfile)) {
940 while (<$spelling>) {
943 $line =~ s/\s*\n?$//g;
946 next if ($line =~ m/^\s*#/);
947 next if ($line =~ m/^\s*$/);
948 next if ($line =~ m/, disabled/i);
952 my ($suspect, $fix) = split(/->/, $line);
954 $spelling_fix{$suspect} = $fix;
958 warn "No codespell typos will be found - file '$codespellfile': $!\n";
962 $misspellings = join("|", sort keys %spelling_fix) if keys %spelling_fix;
965 my ($wordsRef, $file) = @_;
967 if (open(my $words, '<', $file)) {
971 $line =~ s/\s*\n?$//g;
974 next if ($line =~ m/^\s*#/);
975 next if ($line =~ m/^\s*$/);
977 print("$file: '$line' invalid - ignored\n");
981 $$wordsRef .= '|' if (defined $$wordsRef);
992 if (show_type("CONST_STRUCT")) {
993 read_words(\$const_structs, $conststructsfile)
994 or warn "No structs that should be const will be found - file '$conststructsfile': $!\n";
997 if (defined($typedefsfile)) {
998 my $typeOtherTypedefs;
999 read_words(\$typeOtherTypedefs, $typedefsfile)
1000 or warn "No additional types will be considered - file '$typedefsfile': $!\n";
1001 $typeTypedefs .= '|' . $typeOtherTypedefs if (defined $typeOtherTypedefs);
1005 my $mods = "(?x: \n" . join("|\n ", (@modifierList, @modifierListFile)) . "\n)";
1006 my $all = "(?x: \n" . join("|\n ", (@typeList, @typeListFile)) . "\n)";
1007 my $Misordered = "(?x: \n" . join("|\n ", @typeListMisordered) . "\n)";
1008 my $allWithAttr = "(?x: \n" . join("|\n ", @typeListWithAttr) . "\n)";
1009 $Modifier = qr{(?:$Attribute|$Sparse|$mods)};
1011 (?:$typeTypedefs\b)|
1015 (?:$Modifier\s+|const\s+)*
1017 (?:typeof|__typeof__)\s*\([^\)]*\)|
1018 (?:$typeTypedefs\b)|
1021 (?:\s+$Modifier|\s+const)*
1023 $NonptrTypeMisordered = qr{
1024 (?:$Modifier\s+|const\s+)*
1028 (?:\s+$Modifier|\s+const)*
1030 $NonptrTypeWithAttr = qr{
1031 (?:$Modifier\s+|const\s+)*
1033 (?:typeof|__typeof__)\s*\([^\)]*\)|
1034 (?:$typeTypedefs\b)|
1035 (?:${allWithAttr}\b)
1037 (?:\s+$Modifier|\s+const)*
1041 (?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+){0,4}
1042 (?:\s+$Inline|\s+$Modifier)*
1044 $TypeMisordered = qr{
1045 $NonptrTypeMisordered
1046 (?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+){0,4}
1047 (?:\s+$Inline|\s+$Modifier)*
1049 $Declare = qr{(?:$Storage\s+(?:$Inline\s+)?)?$Type};
1050 $DeclareMisordered = qr{(?:$Storage\s+(?:$Inline\s+)?)?$TypeMisordered};
1054 our $Typecast = qr{\s*(\(\s*$NonptrType\s*\)){0,1}\s*};
1056 # Using $balanced_parens, $LvalOrFunc, or $FuncArg
1057 # requires at least perl version v5.10.0
1058 # Any use must be runtime checked with $^V
1060 our $balanced_parens = qr/(\((?:[^\(\)]++|(?-1))*\))/;
1061 our $LvalOrFunc = qr{((?:[\&\*]\s*)?$Lval)\s*($balanced_parens{0,1})\s*};
1062 our $FuncArg = qr{$Typecast{0,1}($LvalOrFunc|$Constant|$String)};
1064 our $declaration_macros = qr{(?x:
1065 (?:$Storage\s+)?(?:[A-Z_][A-Z0-9]*_){0,2}(?:DEFINE|DECLARE)(?:_[A-Z0-9]+){1,6}\s*\(|
1066 (?:$Storage\s+)?[HLP]?LIST_HEAD\s*\(|
1067 (?:SKCIPHER_REQUEST|SHASH_DESC|AHASH_REQUEST)_ON_STACK\s*\(|
1068 (?:$Storage\s+)?(?:XA_STATE|XA_STATE_ORDER)\s*\(
1071 our %allow_repeated_words = (
1078 sub deparenthesize {
1080 return "" if (!defined($string));
1082 while ($string =~ /^\s*\(.*\)\s*$/) {
1083 $string =~ s@^\s*\(\s*@@;
1084 $string =~ s@\s*\)\s*$@@;
1087 $string =~ s@\s+@ @g;
1092 sub seed_camelcase_file {
1095 return if (!(-f $file));
1099 open(my $include_file, '<', "$file")
1100 or warn "$P: Can't read '$file' $!\n";
1101 my $text = <$include_file>;
1102 close($include_file);
1104 my @lines = split('\n', $text);
1106 foreach my $line (@lines) {
1107 next if ($line !~ /(?:[A-Z][a-z]|[a-z][A-Z])/);
1108 if ($line =~ /^[ \t]*(?:#[ \t]*define|typedef\s+$Type)\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)/) {
1110 } elsif ($line =~ /^\s*$Declare\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)\s*[\(\[,;]/) {
1112 } elsif ($line =~ /^\s*(?:union|struct|enum)\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)\s*[;\{]/) {
1118 our %maintained_status = ();
1120 sub is_maintained_obsolete {
1121 my ($filename) = @_;
1123 return 0 if (!$tree || !(-e "$root/scripts/get_maintainer.pl"));
1125 if (!exists($maintained_status{$filename})) {
1126 $maintained_status{$filename} = `perl $root/scripts/get_maintainer.pl --status --nom --nol --nogit --nogit-fallback -f $filename 2>&1`;
1129 return $maintained_status{$filename} =~ /obsolete/i;
1132 sub is_SPDX_License_valid {
1135 # OpenOCD specific: Begin: replace s"scripts"tools/scripts"
1136 return 1 if (!$tree || which("python3") eq "" || !(-x "$root/tools/scripts/spdxcheck.py") || !(-e "$gitroot"));
1138 my $root_path = abs_path($root);
1139 my $status = `cd "$root_path"; echo "$license" | tools/scripts/spdxcheck.py -`;
1140 # OpenOCD specific: End
1141 return 0 if ($status ne "");
1145 my $camelcase_seeded = 0;
1146 sub seed_camelcase_includes {
1147 return if ($camelcase_seeded);
1150 my $camelcase_cache = "";
1151 my @include_files = ();
1153 $camelcase_seeded = 1;
1155 if (-e "$gitroot") {
1156 my $git_last_include_commit = `${git_command} log --no-merges --pretty=format:"%h%n" -1 -- include`;
1157 chomp $git_last_include_commit;
1158 $camelcase_cache = ".checkpatch-camelcase.git.$git_last_include_commit";
1160 my $last_mod_date = 0;
1161 $files = `find $root/include -name "*.h"`;
1162 @include_files = split('\n', $files);
1163 foreach my $file (@include_files) {
1164 my $date = POSIX::strftime("%Y%m%d%H%M",
1165 localtime((stat $file)[9]));
1166 $last_mod_date = $date if ($last_mod_date < $date);
1168 $camelcase_cache = ".checkpatch-camelcase.date.$last_mod_date";
1171 if ($camelcase_cache ne "" && -f $camelcase_cache) {
1172 open(my $camelcase_file, '<', "$camelcase_cache")
1173 or warn "$P: Can't read '$camelcase_cache' $!\n";
1174 while (<$camelcase_file>) {
1178 close($camelcase_file);
1183 if (-e "$gitroot") {
1184 $files = `${git_command} ls-files "include/*.h"`;
1185 @include_files = split('\n', $files);
1188 foreach my $file (@include_files) {
1189 seed_camelcase_file($file);
1192 if ($camelcase_cache ne "") {
1193 unlink glob ".checkpatch-camelcase.*";
1194 open(my $camelcase_file, '>', "$camelcase_cache")
1195 or warn "$P: Can't write '$camelcase_cache' $!\n";
1196 foreach (sort { lc($a) cmp lc($b) } keys(%camelcase)) {
1197 print $camelcase_file ("$_\n");
1199 close($camelcase_file);
1203 sub git_is_single_file {
1204 my ($filename) = @_;
1206 return 0 if ((which("git") eq "") || !(-e "$gitroot"));
1208 my $output = `${git_command} ls-files -- $filename 2>/dev/null`;
1209 my $count = $output =~ tr/\n//;
1210 return $count eq 1 && $output =~ m{^${filename}$};
1213 sub git_commit_info {
1214 my ($commit, $id, $desc) = @_;
1216 return ($id, $desc) if ((which("git") eq "") || !(-e "$gitroot"));
1218 my $output = `${git_command} log --no-color --format='%H %s' -1 $commit 2>&1`;
1219 $output =~ s/^\s*//gm;
1220 my @lines = split("\n", $output);
1222 return ($id, $desc) if ($#lines < 0);
1224 if ($lines[0] =~ /^error: short SHA1 $commit is ambiguous/) {
1225 # Maybe one day convert this block of bash into something that returns
1226 # all matching commit ids, but it's very slow...
1228 # echo "checking commits $1..."
1229 # git rev-list --remotes | grep -i "^$1" |
1230 # while read line ; do
1231 # git log --format='%H %s' -1 $line |
1232 # echo "commit $(cut -c 1-12,41-)"
1234 } elsif ($lines[0] =~ /^fatal: ambiguous argument '$commit': unknown revision or path not in the working tree\./ ||
1235 $lines[0] =~ /^fatal: bad object $commit/) {
1238 $id = substr($lines[0], 0, 12);
1239 $desc = substr($lines[0], 41);
1242 return ($id, $desc);
1245 $chk_signoff = 0 if ($file);
1250 my @fixed_inserted = ();
1251 my @fixed_deleted = ();
1254 # If input is git commits, extract all commits from the commit expressions.
1255 # For example, HEAD-3 means we need check 'HEAD, HEAD~1, HEAD~2'.
1256 die "$P: No git repository found\n" if ($git && !-e "$gitroot");
1260 foreach my $commit_expr (@ARGV) {
1262 if ($commit_expr =~ m/^(.*)-(\d+)$/) {
1263 $git_range = "-$2 $1";
1264 } elsif ($commit_expr =~ m/\.\./) {
1265 $git_range = "$commit_expr";
1267 $git_range = "-1 $commit_expr";
1269 my $lines = `${git_command} log --no-color --no-merges --pretty=format:'%H %s' $git_range`;
1270 foreach my $line (split(/\n/, $lines)) {
1271 $line =~ /^([0-9a-fA-F]{40,40}) (.*)$/;
1272 next if (!defined($1) || !defined($2));
1275 unshift(@commits, $sha1);
1276 $git_commits{$sha1} = $subject;
1279 die "$P: no git commits after extraction!\n" if (@commits == 0);
1284 $allow_c99_comments = !defined $ignore_type{"C99_COMMENT_TOLERANCE"};
1285 for my $filename (@ARGV) {
1287 my $is_git_file = git_is_single_file($filename);
1288 my $oldfile = $file;
1289 $file = 1 if ($is_git_file);
1291 open($FILE, '-|', "git format-patch -M --stdout -1 $filename") ||
1292 die "$P: $filename: git format-patch failed - $!\n";
1294 open($FILE, '-|', "diff -u /dev/null $filename") ||
1295 die "$P: $filename: diff failed - $!\n";
1296 } elsif ($filename eq '-') {
1297 open($FILE, '<&STDIN');
1299 open($FILE, '<', "$filename") ||
1300 die "$P: $filename: open failed - $!\n";
1302 if ($filename eq '-') {
1303 $vname = 'Your patch';
1305 $vname = "Commit " . substr($filename, 0, 12) . ' ("' . $git_commits{$filename} . '")';
1311 push(@rawlines, $_);
1312 $vname = qq("$1") if ($filename eq '-' && $_ =~ m/^Subject:\s+(.+)/i);
1316 if ($#ARGV > 0 && $quiet == 0) {
1317 print '-' x length($vname) . "\n";
1319 print '-' x length($vname) . "\n";
1322 if (!process($filename)) {
1328 @fixed_inserted = ();
1329 @fixed_deleted = ();
1331 @modifierListFile = ();
1334 $file = $oldfile if ($is_git_file);
1338 hash_show_words(\%use_type, "Used");
1339 hash_show_words(\%ignore_type, "Ignored");
1341 if (!$perl_version_ok) {
1344 NOTE: perl $^V is not modern enough to detect all possible issues.
1345 An upgrade to at least perl $minimum_perl_version is suggested.
1352 NOTE: If any of the errors are false positives, please report
1353 them to the maintainer, see CHECKPATCH in MAINTAINERS.
1356 # OpenOCD specific: Begin
1359 NOTE: If any of the errors are false positives, please report
1360 them to the openocd-devel mailing list or prepare a patch
1361 and send it to Gerrit for review.
1363 # OpenOCD specific: End
1369 sub top_of_kernel_tree {
1374 "COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile",
1375 "README", "Documentation", "arch", "include", "drivers",
1376 "fs", "init", "ipc", "kernel", "lib", "scripts",
1379 # OpenOCD specific: Begin
1381 "AUTHORS", "BUGS", "COPYING", "HACKING", "Makefile.am",
1382 "README", "contrib", "doc", "src", "tcl", "testing", "tools",
1384 # OpenOCD specific: End
1386 foreach my $check (@tree_check) {
1387 if (! -e $root . '/' . $check) {
1395 my ($formatted_email) = @_;
1399 my $name_comment = "";
1403 if ($formatted_email =~ /^(.*)<(\S+\@\S+)>(.*)$/) {
1406 $comment = $3 if defined $3;
1407 } elsif ($formatted_email =~ /^\s*<(\S+\@\S+)>(.*)$/) {
1409 $comment = $2 if defined $2;
1410 } elsif ($formatted_email =~ /(\S+\@\S+)(.*)$/) {
1412 $comment = $2 if defined $2;
1413 $formatted_email =~ s/\Q$address\E.*$//;
1414 $name = $formatted_email;
1415 $name = trim($name);
1416 $name =~ s/^\"|\"$//g;
1417 # If there's a name left after stripping spaces and
1418 # leading quotes, and the address doesn't have both
1419 # leading and trailing angle brackets, the address
1421 # "joe smith joe@smith.com" bad
1422 # "joe smith <joe@smith.com" bad
1423 if ($name ne "" && $address !~ /^<[^>]+>$/) {
1428 # OpenOCD specific: Begin: handle jenkins as valid email
1429 } elsif ($formatted_email eq "jenkins") {
1430 $address = "jenkins";
1431 # OpenOCD specific: End
1434 # Extract comments from names excluding quoted parts
1435 # "John D. (Doe)" - Do not extract
1436 if ($name =~ s/\"(.+)\"//) {
1439 while ($name =~ s/\s*($balanced_parens)\s*/ /) {
1440 $name_comment .= trim($1);
1442 $name =~ s/^[ \"]+|[ \"]+$//g;
1443 $name = trim("$quoted $name");
1445 $address = trim($address);
1446 $address =~ s/^\<|\>$//g;
1447 $comment = trim($comment);
1449 if ($name =~ /[^\w \-]/i) { ##has "must quote" chars
1450 $name =~ s/(?<!\\)"/\\"/g; ##escape quotes
1451 $name = "\"$name\"";
1454 return ($name, $name_comment, $address, $comment);
1458 my ($name, $name_comment, $address, $comment) = @_;
1460 my $formatted_email;
1462 $name =~ s/^[ \"]+|[ \"]+$//g;
1463 $address = trim($address);
1464 $address =~ s/(?:\.|\,|\")+$//; ##trailing commas, dots or quotes
1466 if ($name =~ /[^\w \-]/i) { ##has "must quote" chars
1467 $name =~ s/(?<!\\)"/\\"/g; ##escape quotes
1468 $name = "\"$name\"";
1471 $name_comment = trim($name_comment);
1472 $name_comment = " $name_comment" if ($name_comment ne "");
1473 $comment = trim($comment);
1474 $comment = " $comment" if ($comment ne "");
1476 if ("$name" eq "") {
1477 $formatted_email = "$address";
1479 $formatted_email = "$name$name_comment <$address>";
1481 $formatted_email .= "$comment";
1482 return $formatted_email;
1485 sub reformat_email {
1488 my ($email_name, $name_comment, $email_address, $comment) = parse_email($email);
1489 return format_email($email_name, $name_comment, $email_address, $comment);
1492 sub same_email_addresses {
1493 my ($email1, $email2) = @_;
1495 my ($email1_name, $name1_comment, $email1_address, $comment1) = parse_email($email1);
1496 my ($email2_name, $name2_comment, $email2_address, $comment2) = parse_email($email2);
1498 return $email1_name eq $email2_name &&
1499 $email1_address eq $email2_address &&
1500 $name1_comment eq $name2_comment &&
1501 $comment1 eq $comment2;
1507 foreach my $path (split(/:/, $ENV{PATH})) {
1508 if (-e "$path/$bin") {
1509 return "$path/$bin";
1519 foreach my $path (split(/:/, ".:$ENV{HOME}:.scripts")) {
1520 if (-e "$path/$conf") {
1521 return "$path/$conf";
1533 for my $c (split(//, $str)) {
1537 for (; ($n % $tabsize) != 0; $n++) {
1549 (my $res = shift) =~ tr/\t/ /c;
1556 # Drop the diff line leader and expand tabs
1558 $line = expand_tabs($line);
1560 # Pick the indent from the front of the line.
1561 my ($white) = ($line =~ /^(\s*)/);
1563 return (length($line), length($white));
1566 my $sanitise_quote = '';
1568 sub sanitise_line_reset {
1569 my ($in_comment) = @_;
1572 $sanitise_quote = '*/';
1574 $sanitise_quote = '';
1587 # Always copy over the diff marker.
1588 $res = substr($line, 0, 1);
1590 for ($off = 1; $off < length($line); $off++) {
1591 $c = substr($line, $off, 1);
1593 # Comments we are whacking completely including the begin
1594 # and end, all to $;.
1595 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '/*') {
1596 $sanitise_quote = '*/';
1598 substr($res, $off, 2, "$;$;");
1602 if ($sanitise_quote eq '*/' && substr($line, $off, 2) eq '*/') {
1603 $sanitise_quote = '';
1604 substr($res, $off, 2, "$;$;");
1608 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '//') {
1609 $sanitise_quote = '//';
1611 substr($res, $off, 2, $sanitise_quote);
1616 # A \ in a string means ignore the next character.
1617 if (($sanitise_quote eq "'" || $sanitise_quote eq '"') &&
1619 substr($res, $off, 2, 'XX');
1624 if ($c eq "'" || $c eq '"') {
1625 if ($sanitise_quote eq '') {
1626 $sanitise_quote = $c;
1628 substr($res, $off, 1, $c);
1630 } elsif ($sanitise_quote eq $c) {
1631 $sanitise_quote = '';
1635 #print "c<$c> SQ<$sanitise_quote>\n";
1636 if ($off != 0 && $sanitise_quote eq '*/' && $c ne "\t") {
1637 substr($res, $off, 1, $;);
1638 } elsif ($off != 0 && $sanitise_quote eq '//' && $c ne "\t") {
1639 substr($res, $off, 1, $;);
1640 } elsif ($off != 0 && $sanitise_quote && $c ne "\t") {
1641 substr($res, $off, 1, 'X');
1643 substr($res, $off, 1, $c);
1647 if ($sanitise_quote eq '//') {
1648 $sanitise_quote = '';
1651 # The pathname on a #include may be surrounded by '<' and '>'.
1652 if ($res =~ /^.\s*\#\s*include\s+\<(.*)\>/) {
1653 my $clean = 'X' x length($1);
1654 $res =~ s@\<.*\>@<$clean>@;
1656 # The whole of a #error is a string.
1657 } elsif ($res =~ /^.\s*\#\s*(?:error|warning)\s+(.*)\b/) {
1658 my $clean = 'X' x length($1);
1659 $res =~ s@(\#\s*(?:error|warning)\s+).*@$1$clean@;
1662 if ($allow_c99_comments && $res =~ m@(//.*$)@) {
1664 $res =~ s/\Q$match\E/"$;" x length($match)/e;
1670 sub get_quoted_string {
1671 my ($line, $rawline) = @_;
1673 return "" if (!defined($line) || !defined($rawline));
1674 return "" if ($line !~ m/($String)/g);
1675 return substr($rawline, $-[0], $+[0] - $-[0]);
1678 sub ctx_statement_block {
1679 my ($linenr, $remain, $off) = @_;
1680 my $line = $linenr - 1;
1683 my $coff = $off - 1;
1697 @stack = (['', 0]) if ($#stack == -1);
1699 #warn "CSB: blk<$blk> remain<$remain>\n";
1700 # If we are about to drop off the end, pull in more
1703 for (; $remain > 0; $line++) {
1704 last if (!defined $lines[$line]);
1705 next if ($lines[$line] =~ /^-/);
1708 $blk .= $lines[$line] . "\n";
1709 $len = length($blk);
1713 # Bail if there is no further context.
1714 #warn "CSB: blk<$blk> off<$off> len<$len>\n";
1718 if ($level == 0 && substr($blk, $off) =~ /^.\s*#\s*define/) {
1724 $c = substr($blk, $off, 1);
1725 $remainder = substr($blk, $off);
1727 #warn "CSB: c<$c> type<$type> level<$level> remainder<$remainder> coff_set<$coff_set>\n";
1729 # Handle nested #if/#else.
1730 if ($remainder =~ /^#\s*(?:ifndef|ifdef|if)\s/) {
1731 push(@stack, [ $type, $level ]);
1732 } elsif ($remainder =~ /^#\s*(?:else|elif)\b/) {
1733 ($type, $level) = @{$stack[$#stack - 1]};
1734 } elsif ($remainder =~ /^#\s*endif\b/) {
1735 ($type, $level) = @{pop(@stack)};
1738 # Statement ends at the ';' or a close '}' at the
1740 if ($level == 0 && $c eq ';') {
1744 # An else is really a conditional as long as its not else if
1745 if ($level == 0 && $coff_set == 0 &&
1746 (!defined($p) || $p =~ /(?:\s|\}|\+)/) &&
1747 $remainder =~ /^(else)(?:\s|{)/ &&
1748 $remainder !~ /^else\s+if\b/) {
1749 $coff = $off + length($1) - 1;
1751 #warn "CSB: mark coff<$coff> soff<$soff> 1<$1>\n";
1752 #warn "[" . substr($blk, $soff, $coff - $soff + 1) . "]\n";
1755 if (($type eq '' || $type eq '(') && $c eq '(') {
1759 if ($type eq '(' && $c eq ')') {
1761 $type = ($level != 0)? '(' : '';
1763 if ($level == 0 && $coff < $soff) {
1766 #warn "CSB: mark coff<$coff>\n";
1769 if (($type eq '' || $type eq '{') && $c eq '{') {
1773 if ($type eq '{' && $c eq '}') {
1775 $type = ($level != 0)? '{' : '';
1778 if (substr($blk, $off + 1, 1) eq ';') {
1784 # Preprocessor commands end at the newline unless escaped.
1785 if ($type eq '#' && $c eq "\n" && $p ne "\\") {
1793 # We are truly at the end, so shuffle to the next line.
1800 my $statement = substr($blk, $soff, $off - $soff + 1);
1801 my $condition = substr($blk, $soff, $coff - $soff + 1);
1803 #warn "STATEMENT<$statement>\n";
1804 #warn "CONDITION<$condition>\n";
1806 #print "coff<$coff> soff<$off> loff<$loff>\n";
1808 return ($statement, $condition,
1809 $line, $remain + 1, $off - $loff + 1, $level);
1812 sub statement_lines {
1815 # Strip the diff line prefixes and rip blank lines at start and end.
1816 $stmt =~ s/(^|\n)./$1/g;
1820 my @stmt_lines = ($stmt =~ /\n/g);
1822 return $#stmt_lines + 2;
1825 sub statement_rawlines {
1828 my @stmt_lines = ($stmt =~ /\n/g);
1830 return $#stmt_lines + 2;
1833 sub statement_block_size {
1836 $stmt =~ s/(^|\n)./$1/g;
1842 my @stmt_lines = ($stmt =~ /\n/g);
1843 my @stmt_statements = ($stmt =~ /;/g);
1845 my $stmt_lines = $#stmt_lines + 2;
1846 my $stmt_statements = $#stmt_statements + 1;
1848 if ($stmt_lines > $stmt_statements) {
1851 return $stmt_statements;
1855 sub ctx_statement_full {
1856 my ($linenr, $remain, $off) = @_;
1857 my ($statement, $condition, $level);
1861 # Grab the first conditional/block pair.
1862 ($statement, $condition, $linenr, $remain, $off, $level) =
1863 ctx_statement_block($linenr, $remain, $off);
1864 #print "F: c<$condition> s<$statement> remain<$remain>\n";
1865 push(@chunks, [ $condition, $statement ]);
1866 if (!($remain > 0 && $condition =~ /^\s*(?:\n[+-])?\s*(?:if|else|do)\b/s)) {
1867 return ($level, $linenr, @chunks);
1870 # Pull in the following conditional/block pairs and see if they
1871 # could continue the statement.
1873 ($statement, $condition, $linenr, $remain, $off, $level) =
1874 ctx_statement_block($linenr, $remain, $off);
1875 #print "C: c<$condition> s<$statement> remain<$remain>\n";
1876 last if (!($remain > 0 && $condition =~ /^(?:\s*\n[+-])*\s*(?:else|do)\b/s));
1878 push(@chunks, [ $condition, $statement ]);
1881 return ($level, $linenr, @chunks);
1885 my ($linenr, $remain, $outer, $open, $close, $off) = @_;
1887 my $start = $linenr - 1;
1894 my @stack = ($level);
1895 for ($line = $start; $remain > 0; $line++) {
1896 next if ($rawlines[$line] =~ /^-/);
1899 $blk .= $rawlines[$line];
1901 # Handle nested #if/#else.
1902 if ($lines[$line] =~ /^.\s*#\s*(?:ifndef|ifdef|if)\s/) {
1903 push(@stack, $level);
1904 } elsif ($lines[$line] =~ /^.\s*#\s*(?:else|elif)\b/) {
1905 $level = $stack[$#stack - 1];
1906 } elsif ($lines[$line] =~ /^.\s*#\s*endif\b/) {
1907 $level = pop(@stack);
1910 foreach my $c (split(//, $lines[$line])) {
1911 ##print "C<$c>L<$level><$open$close>O<$off>\n";
1917 if ($c eq $close && $level > 0) {
1919 last if ($level == 0);
1920 } elsif ($c eq $open) {
1925 if (!$outer || $level <= 1) {
1926 push(@res, $rawlines[$line]);
1929 last if ($level == 0);
1932 return ($level, @res);
1934 sub ctx_block_outer {
1935 my ($linenr, $remain) = @_;
1937 my ($level, @r) = ctx_block_get($linenr, $remain, 1, '{', '}', 0);
1941 my ($linenr, $remain) = @_;
1943 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0);
1947 my ($linenr, $remain, $off) = @_;
1949 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '(', ')', $off);
1952 sub ctx_block_level {
1953 my ($linenr, $remain) = @_;
1955 return ctx_block_get($linenr, $remain, 0, '{', '}', 0);
1957 sub ctx_statement_level {
1958 my ($linenr, $remain, $off) = @_;
1960 return ctx_block_get($linenr, $remain, 0, '(', ')', $off);
1963 sub ctx_locate_comment {
1964 my ($first_line, $end_line) = @_;
1966 # If c99 comment on the current line, or the line before or after
1967 my ($current_comment) = ($rawlines[$end_line - 1] =~ m@^\+.*(//.*$)@);
1968 return $current_comment if (defined $current_comment);
1969 ($current_comment) = ($rawlines[$end_line - 2] =~ m@^[\+ ].*(//.*$)@);
1970 return $current_comment if (defined $current_comment);
1971 ($current_comment) = ($rawlines[$end_line] =~ m@^[\+ ].*(//.*$)@);
1972 return $current_comment if (defined $current_comment);
1974 # Catch a comment on the end of the line itself.
1975 ($current_comment) = ($rawlines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*(?:\\\s*)?$@);
1976 return $current_comment if (defined $current_comment);
1978 # Look through the context and try and figure out if there is a
1981 $current_comment = '';
1982 for (my $linenr = $first_line; $linenr < $end_line; $linenr++) {
1983 my $line = $rawlines[$linenr - 1];
1985 if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
1988 if ($line =~ m@/\*@) {
1991 if (!$in_comment && $current_comment ne '') {
1992 $current_comment = '';
1994 $current_comment .= $line . "\n" if ($in_comment);
1995 if ($line =~ m@\*/@) {
2000 chomp($current_comment);
2001 return($current_comment);
2003 sub ctx_has_comment {
2004 my ($first_line, $end_line) = @_;
2005 my $cmt = ctx_locate_comment($first_line, $end_line);
2007 ##print "LINE: $rawlines[$end_line - 1 ]\n";
2008 ##print "CMMT: $cmt\n";
2010 return ($cmt ne '');
2014 my ($linenr, $cnt) = @_;
2016 my $offset = $linenr - 1;
2021 $line = $rawlines[$offset++];
2022 next if (defined($line) && $line =~ /^-/);
2030 my ($linenr, $lc) = @_;
2032 my $stat_real = raw_line($linenr, 0);
2033 for (my $count = $linenr + 1; $count <= $lc; $count++) {
2034 $stat_real = $stat_real . "\n" . raw_line($count, 0);
2041 my ($linenr, $cnt, $here) = @_;
2043 my $herectx = $here . "\n";
2044 for (my $n = 0; $n < $cnt; $n++) {
2045 $herectx .= raw_line($linenr, $n) . "\n";
2056 while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]]|$)/g) {
2059 $coded = sprintf("^%c", unpack('C', $2) + 64);
2068 my $av_preprocessor = 0;
2073 sub annotate_reset {
2074 $av_preprocessor = 0;
2076 @av_paren_type = ('E');
2077 $av_pend_colon = 'O';
2080 sub annotate_values {
2081 my ($stream, $type) = @_;
2084 my $var = '_' x length($stream);
2087 print "$stream\n" if ($dbg_values > 1);
2089 while (length($cur)) {
2090 @av_paren_type = ('E') if ($#av_paren_type < 0);
2091 print " <" . join('', @av_paren_type) .
2092 "> <$type> <$av_pending>" if ($dbg_values > 1);
2093 if ($cur =~ /^(\s+)/o) {
2094 print "WS($1)\n" if ($dbg_values > 1);
2095 if ($1 =~ /\n/ && $av_preprocessor) {
2096 $type = pop(@av_paren_type);
2097 $av_preprocessor = 0;
2100 } elsif ($cur =~ /^(\(\s*$Type\s*)\)/ && $av_pending eq '_') {
2101 print "CAST($1)\n" if ($dbg_values > 1);
2102 push(@av_paren_type, $type);
2105 } elsif ($cur =~ /^($Type)\s*(?:$Ident|,|\)|\(|\s*$)/) {
2106 print "DECLARE($1)\n" if ($dbg_values > 1);
2109 } elsif ($cur =~ /^($Modifier)\s*/) {
2110 print "MODIFIER($1)\n" if ($dbg_values > 1);
2113 } elsif ($cur =~ /^(\#\s*define\s*$Ident)(\(?)/o) {
2114 print "DEFINE($1,$2)\n" if ($dbg_values > 1);
2115 $av_preprocessor = 1;
2116 push(@av_paren_type, $type);
2122 } elsif ($cur =~ /^(\#\s*(?:undef\s*$Ident|include\b))/o) {
2123 print "UNDEF($1)\n" if ($dbg_values > 1);
2124 $av_preprocessor = 1;
2125 push(@av_paren_type, $type);
2127 } elsif ($cur =~ /^(\#\s*(?:ifdef|ifndef|if))/o) {
2128 print "PRE_START($1)\n" if ($dbg_values > 1);
2129 $av_preprocessor = 1;
2131 push(@av_paren_type, $type);
2132 push(@av_paren_type, $type);
2135 } elsif ($cur =~ /^(\#\s*(?:else|elif))/o) {
2136 print "PRE_RESTART($1)\n" if ($dbg_values > 1);
2137 $av_preprocessor = 1;
2139 push(@av_paren_type, $av_paren_type[$#av_paren_type]);
2143 } elsif ($cur =~ /^(\#\s*(?:endif))/o) {
2144 print "PRE_END($1)\n" if ($dbg_values > 1);
2146 $av_preprocessor = 1;
2148 # Assume all arms of the conditional end as this
2149 # one does, and continue as if the #endif was not here.
2150 pop(@av_paren_type);
2151 push(@av_paren_type, $type);
2154 } elsif ($cur =~ /^(\\\n)/o) {
2155 print "PRECONT($1)\n" if ($dbg_values > 1);
2157 } elsif ($cur =~ /^(__attribute__)\s*\(?/o) {
2158 print "ATTR($1)\n" if ($dbg_values > 1);
2159 $av_pending = $type;
2162 } elsif ($cur =~ /^(sizeof)\s*(\()?/o) {
2163 print "SIZEOF($1)\n" if ($dbg_values > 1);
2169 } elsif ($cur =~ /^(if|while|for)\b/o) {
2170 print "COND($1)\n" if ($dbg_values > 1);
2174 } elsif ($cur =~/^(case)/o) {
2175 print "CASE($1)\n" if ($dbg_values > 1);
2176 $av_pend_colon = 'C';
2179 } elsif ($cur =~/^(return|else|goto|typeof|__typeof__)\b/o) {
2180 print "KEYWORD($1)\n" if ($dbg_values > 1);
2183 } elsif ($cur =~ /^(\()/o) {
2184 print "PAREN('$1')\n" if ($dbg_values > 1);
2185 push(@av_paren_type, $av_pending);
2189 } elsif ($cur =~ /^(\))/o) {
2190 my $new_type = pop(@av_paren_type);
2191 if ($new_type ne '_') {
2193 print "PAREN('$1') -> $type\n"
2194 if ($dbg_values > 1);
2196 print "PAREN('$1')\n" if ($dbg_values > 1);
2199 } elsif ($cur =~ /^($Ident)\s*\(/o) {
2200 print "FUNC($1)\n" if ($dbg_values > 1);
2204 } elsif ($cur =~ /^($Ident\s*):(?:\s*\d+\s*(,|=|;))?/) {
2205 if (defined $2 && $type eq 'C' || $type eq 'T') {
2206 $av_pend_colon = 'B';
2207 } elsif ($type eq 'E') {
2208 $av_pend_colon = 'L';
2210 print "IDENT_COLON($1,$type>$av_pend_colon)\n" if ($dbg_values > 1);
2213 } elsif ($cur =~ /^($Ident|$Constant)/o) {
2214 print "IDENT($1)\n" if ($dbg_values > 1);
2217 } elsif ($cur =~ /^($Assignment)/o) {
2218 print "ASSIGN($1)\n" if ($dbg_values > 1);
2221 } elsif ($cur =~/^(;|{|})/) {
2222 print "END($1)\n" if ($dbg_values > 1);
2224 $av_pend_colon = 'O';
2226 } elsif ($cur =~/^(,)/) {
2227 print "COMMA($1)\n" if ($dbg_values > 1);
2230 } elsif ($cur =~ /^(\?)/o) {
2231 print "QUESTION($1)\n" if ($dbg_values > 1);
2234 } elsif ($cur =~ /^(:)/o) {
2235 print "COLON($1,$av_pend_colon)\n" if ($dbg_values > 1);
2237 substr($var, length($res), 1, $av_pend_colon);
2238 if ($av_pend_colon eq 'C' || $av_pend_colon eq 'L') {
2243 $av_pend_colon = 'O';
2245 } elsif ($cur =~ /^(\[)/o) {
2246 print "CLOSE($1)\n" if ($dbg_values > 1);
2249 } elsif ($cur =~ /^(-(?![->])|\+(?!\+)|\*|\&\&|\&)/o) {
2252 print "OPV($1)\n" if ($dbg_values > 1);
2259 substr($var, length($res), 1, $variant);
2262 } elsif ($cur =~ /^($Operators)/o) {
2263 print "OP($1)\n" if ($dbg_values > 1);
2264 if ($1 ne '++' && $1 ne '--') {
2268 } elsif ($cur =~ /(^.)/o) {
2269 print "C($1)\n" if ($dbg_values > 1);
2272 $cur = substr($cur, length($1));
2273 $res .= $type x length($1);
2277 return ($res, $var);
2281 my ($possible, $line) = @_;
2282 my $notPermitted = qr{(?:
2299 ^(?:typedef|struct|enum)\b
2301 warn "CHECK<$possible> ($line)\n" if ($dbg_possible > 2);
2302 if ($possible !~ $notPermitted) {
2303 # Check for modifiers.
2304 $possible =~ s/\s*$Storage\s*//g;
2305 $possible =~ s/\s*$Sparse\s*//g;
2306 if ($possible =~ /^\s*$/) {
2308 } elsif ($possible =~ /\s/) {
2309 $possible =~ s/\s*$Type\s*//g;
2310 for my $modifier (split(' ', $possible)) {
2311 if ($modifier !~ $notPermitted) {
2312 warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible);
2313 push(@modifierListFile, $modifier);
2318 warn "POSSIBLE: $possible ($line)\n" if ($dbg_possible);
2319 push(@typeListFile, $possible);
2323 warn "NOTPOSS: $possible ($line)\n" if ($dbg_possible > 1);
2332 $type =~ tr/[a-z]/[A-Z]/;
2334 return defined $use_type{$type} if (scalar keys %use_type > 0);
2336 return !defined $ignore_type{$type};
2340 my ($level, $type, $msg) = @_;
2342 if (!show_type($type) ||
2343 (defined $tst_only && $msg !~ /\Q$tst_only\E/)) {
2348 if ($level eq 'ERROR') {
2350 } elsif ($level eq 'WARNING') {
2356 $output .= $prefix . $level . ':';
2358 $output .= BLUE if ($color);
2359 $output .= "$type:";
2361 $output .= RESET if ($color);
2362 $output .= ' ' . $msg . "\n";
2365 my @lines = split("\n", $output, -1);
2366 splice(@lines, 1, 1);
2367 $output = join("\n", @lines);
2371 $output = (split('\n', $output))[0] . "\n";
2374 if ($verbose && exists($verbose_messages{$type}) &&
2375 !exists($verbose_emitted{$type})) {
2376 $output .= $verbose_messages{$type} . "\n\n";
2377 $verbose_emitted{$type} = 1;
2380 push(our @report, $output);
2389 sub fixup_current_range {
2390 my ($lineRef, $offset, $length) = @_;
2392 if ($$lineRef =~ /^\@\@ -\d+,\d+ \+(\d+),(\d+) \@\@/) {
2395 my $no = $o + $offset;
2396 my $nl = $l + $length;
2397 $$lineRef =~ s/\+$o,$l \@\@/\+$no,$nl \@\@/;
2401 sub fix_inserted_deleted_lines {
2402 my ($linesRef, $insertedRef, $deletedRef) = @_;
2404 my $range_last_linenr = 0;
2405 my $delta_offset = 0;
2410 my $next_insert = 0;
2411 my $next_delete = 0;
2415 my $inserted = @{$insertedRef}[$next_insert++];
2416 my $deleted = @{$deletedRef}[$next_delete++];
2418 foreach my $old_line (@{$linesRef}) {
2420 my $line = $old_line; #don't modify the array
2421 if ($line =~ /^(?:\+\+\+|\-\-\-)\s+\S+/) { #new filename
2423 } elsif ($line =~ /^\@\@ -\d+,\d+ \+\d+,\d+ \@\@/) { #new hunk
2424 $range_last_linenr = $new_linenr;
2425 fixup_current_range(\$line, $delta_offset, 0);
2428 while (defined($deleted) && ${$deleted}{'LINENR'} == $old_linenr) {
2429 $deleted = @{$deletedRef}[$next_delete++];
2431 fixup_current_range(\$lines[$range_last_linenr], $delta_offset--, -1);
2434 while (defined($inserted) && ${$inserted}{'LINENR'} == $old_linenr) {
2435 push(@lines, ${$inserted}{'LINE'});
2436 $inserted = @{$insertedRef}[$next_insert++];
2438 fixup_current_range(\$lines[$range_last_linenr], $delta_offset++, 1);
2442 push(@lines, $line);
2452 sub fix_insert_line {
2453 my ($linenr, $line) = @_;
2459 push(@fixed_inserted, $inserted);
2462 sub fix_delete_line {
2463 my ($linenr, $line) = @_;
2470 push(@fixed_deleted, $deleted);
2474 my ($type, $msg) = @_;
2476 if (report("ERROR", $type, $msg)) {
2484 my ($type, $msg) = @_;
2486 if (report("WARNING", $type, $msg)) {
2494 my ($type, $msg) = @_;
2496 if ($check && report("CHECK", $type, $msg)) {
2504 sub check_absolute_file {
2505 my ($absolute, $herecurr) = @_;
2506 my $file = $absolute;
2508 ##print "absolute<$absolute>\n";
2510 # See if any suffix of this path is a path within the tree.
2511 while ($file =~ s@^[^/]*/@@) {
2512 if (-f "$root/$file") {
2513 ##print "file<$file>\n";
2521 # It is, so see if the prefix is acceptable.
2522 my $prefix = $absolute;
2523 substr($prefix, -length($file)) = '';
2525 ##print "prefix<$prefix>\n";
2526 if ($prefix ne ".../") {
2527 WARN("USE_RELATIVE_PATH",
2528 "use relative pathname instead of absolute in changelog text\n" . $herecurr);
2535 $string =~ s/^\s+|\s+$//g;
2543 $string =~ s/^\s+//;
2551 $string =~ s/\s+$//;
2556 sub string_find_replace {
2557 my ($string, $find, $replace) = @_;
2559 $string =~ s/$find/$replace/g;
2567 my $source_indent = $tabsize;
2568 my $max_spaces_before_tab = $source_indent - 1;
2569 my $spaces_to_tab = " " x $source_indent;
2571 #convert leading spaces to tabs
2572 1 while $leading =~ s@^([\t]*)$spaces_to_tab@$1\t@g;
2573 #Remove spaces before a tab
2574 1 while $leading =~ s@^([\t]*)( {1,$max_spaces_before_tab})\t@$1\t@g;
2579 sub pos_last_openparen {
2584 my $opens = $line =~ tr/\(/\(/;
2585 my $closes = $line =~ tr/\)/\)/;
2587 my $last_openparen = 0;
2589 if (($opens == 0) || ($closes >= $opens)) {
2593 my $len = length($line);
2595 for ($pos = 0; $pos < $len; $pos++) {
2596 my $string = substr($line, $pos);
2597 if ($string =~ /^($FuncArg|$balanced_parens)/) {
2598 $pos += length($1) - 1;
2599 } elsif (substr($line, $pos, 1) eq '(') {
2600 $last_openparen = $pos;
2601 } elsif (index($string, '(') == -1) {
2606 return length(expand_tabs(substr($line, 0, $last_openparen))) + 1;
2609 sub get_raw_comment {
2610 my ($line, $rawline) = @_;
2613 for my $i (0 .. (length($line) - 1)) {
2614 if (substr($line, $i, 1) eq "$;") {
2615 $comment .= substr($rawline, $i, 1);
2622 sub exclude_global_initialisers {
2623 my ($realfile) = @_;
2625 # Do not check for BPF programs (tools/testing/selftests/bpf/progs/*.c, samples/bpf/*_kern.c, *.bpf.c).
2626 return $realfile =~ m@^tools/testing/selftests/bpf/progs/.*\.c$@ ||
2627 $realfile =~ m@^samples/bpf/.*_kern\.c$@ ||
2628 $realfile =~ m@/bpf/.*\.bpf\.c$@;
2632 my $filename = shift;
2638 my $stashrawline="";
2648 my $authorsignoff = 0;
2649 my $author_sob = '';
2651 my $is_binding_patch = -1;
2652 my $in_header_lines = $file ? 0 : 1;
2653 my $in_commit_log = 0; #Scanning lines before patch
2654 my $has_patch_separator = 0; #Found a --- line
2655 my $has_commit_log = 0; #Encountered lines before patch
2656 my $commit_log_lines = 0; #Number of commit log lines
2657 my $commit_log_possible_stack_dump = 0;
2658 my $commit_log_long_line = 0;
2659 my $commit_log_has_diff = 0;
2660 my $reported_maintainer_file = 0;
2661 my $non_utf8_charset = 0;
2663 my $last_git_commit_id_linenr = -1;
2665 my $last_blank_line = 0;
2666 my $last_coalesced_string_linenr = -1;
2674 # Trace the real file/line as we go.
2679 my $context_function; #undef'd unless there's a known function
2681 my $comment_edge = 0;
2685 my $prev_values = 'E';
2688 my %suppress_ifbraces;
2689 my %suppress_whiletrailers;
2690 my %suppress_export;
2691 my $suppress_statement = 0;
2693 my %signatures = ();
2695 # Pre-scan the patch sanitizing the lines.
2696 # Pre-scan the patch looking for any __setup documentation.
2698 my @setup_docs = ();
2701 my $camelcase_file_seeded = 0;
2703 my $checklicenseline = 1;
2705 sanitise_line_reset();
2707 foreach my $rawline (@rawlines) {
2711 push(@fixed, $rawline) if ($fix);
2713 if ($rawline=~/^\+\+\+\s+(\S+)/) {
2715 if ($1 =~ m@Documentation/admin-guide/kernel-parameters.txt$@) {
2720 if ($rawline =~ /^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
2729 # Guestimate if this is a continuing comment. Run
2730 # the context looking for a comment "edge". If this
2731 # edge is a close comment then we must be in a comment
2735 for (my $ln = $linenr + 1; $cnt > 0; $ln++) {
2736 next if (defined $rawlines[$ln - 1] &&
2737 $rawlines[$ln - 1] =~ /^-/);
2739 #print "RAW<$rawlines[$ln - 1]>\n";
2740 last if (!defined $rawlines[$ln - 1]);
2741 if ($rawlines[$ln - 1] =~ m@(/\*|\*/)@ &&
2742 $rawlines[$ln - 1] !~ m@"[^"]*(?:/\*|\*/)[^"]*"@) {
2747 if (defined $edge && $edge eq '*/') {
2751 # Guestimate if this is a continuing comment. If this
2752 # is the start of a diff block and this line starts
2753 # ' *' then it is very likely a comment.
2754 if (!defined $edge &&
2755 $rawlines[$linenr] =~ m@^.\s*(?:\*\*+| \*)(?:\s|$)@)
2760 ##print "COMMENT:$in_comment edge<$edge> $rawline\n";
2761 sanitise_line_reset($in_comment);
2763 } elsif ($realcnt && $rawline =~ /^(?:\+| |$)/) {
2764 # Standardise the strings and chars within the input to
2765 # simplify matching -- only bother with positive lines.
2766 $line = sanitise_line($rawline);
2768 push(@lines, $line);
2771 $realcnt-- if ($line =~ /^(?:\+| |$)/);
2776 #print "==>$rawline\n";
2777 #print "-->$line\n";
2779 if ($setup_docs && $line =~ /^\+/) {
2780 push(@setup_docs, $line);
2789 foreach my $line (@lines) {
2792 my $sline = $line; #copy of $line
2793 $sline =~ s/$;/ /g; #with comments as spaces
2795 my $rawline = $rawlines[$linenr - 1];
2796 my $raw_comment = get_raw_comment($line, $rawline);
2798 # check if it's a mode change, rename or start of a patch
2799 if (!$in_commit_log &&
2800 ($line =~ /^ mode change [0-7]+ => [0-7]+ \S+\s*$/ ||
2801 ($line =~ /^rename (?:from|to) \S+\s*$/ ||
2802 $line =~ /^diff --git a\/[\w\/\.\_\-]+ b\/\S+\s*$/))) {
2806 #extract the line range in the file after the patch is applied
2807 if (!$in_commit_log &&
2808 $line =~ /^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@(.*)/) {
2811 $first_line = $linenr + 1;
2821 %suppress_ifbraces = ();
2822 %suppress_whiletrailers = ();
2823 %suppress_export = ();
2824 $suppress_statement = 0;
2825 if ($context =~ /\b(\w+)\s*\(/) {
2826 $context_function = $1;
2828 undef $context_function;
2832 # track the line number as we move through the hunk, note that
2833 # new versions of GNU diff omit the leading space on completely
2834 # blank context lines so we need to count that too.
2835 } elsif ($line =~ /^( |\+|$)/) {
2837 $realcnt-- if ($realcnt != 0);
2839 # Measure the line length and indent.
2840 ($length, $indent) = line_stats($rawline);
2842 # Track the previous line.
2843 ($prevline, $stashline) = ($stashline, $line);
2844 ($previndent, $stashindent) = ($stashindent, $indent);
2845 ($prevrawline, $stashrawline) = ($stashrawline, $rawline);
2847 #warn "line<$line>\n";
2849 } elsif ($realcnt == 1) {
2853 my $hunk_line = ($realcnt != 0);
2855 $here = "#$linenr: " if (!$file);
2856 $here = "#$realline: " if ($file);
2859 # extract the filename as it passes
2860 if ($line =~ /^diff --git.*?(\S+)$/) {
2862 $realfile =~ s@^([^/]*)/@@ if (!$file);
2865 } elsif ($line =~ /^\+\+\+\s+(\S+)/) {
2867 $realfile =~ s@^([^/]*)/@@ if (!$file);
2871 if (!$file && $tree && $p1_prefix ne '' &&
2872 -e "$root/$p1_prefix") {
2873 WARN("PATCH_PREFIX",
2874 "patch prefix '$p1_prefix' exists, appears to be a -p0 patch\n");
2877 if ($realfile =~ m@^include/asm/@) {
2878 ERROR("MODIFIED_INCLUDE_ASM",
2879 "do not modify files in include/asm, change architecture specific files in include/asm-<architecture>\n" . "$here$rawline\n");
2884 #make up the handle for any error we report on this line
2886 $prefix = "$realfile:$realline: "
2889 $prefix = "$filename:$realline: ";
2891 $prefix = "$filename:$linenr: ";
2896 if (is_maintained_obsolete($realfile)) {
2898 "$realfile is marked as 'obsolete' in the MAINTAINERS hierarchy. No unnecessary modifications please.\n");
2900 if ($realfile =~ m@^(?:drivers/net/|net/|drivers/staging/)@) {
2903 $check = $check_orig;
2905 $checklicenseline = 1;
2907 if ($realfile !~ /^MAINTAINERS/) {
2908 my $last_binding_patch = $is_binding_patch;
2910 $is_binding_patch = () = $realfile =~ m@^(?:Documentation/devicetree/|include/dt-bindings/)@;
2912 if (($last_binding_patch != -1) &&
2913 ($last_binding_patch ^ $is_binding_patch)) {
2914 WARN("DT_SPLIT_BINDING_PATCH",
2915 "DT binding docs and includes should be a separate patch. See: Documentation/devicetree/bindings/submitting-patches.rst\n");
2922 $here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
2924 my $hereline = "$here\n$rawline\n";
2925 my $herecurr = "$here\n$rawline\n";
2926 my $hereprev = "$here\n$prevrawline\n$rawline\n";
2928 $cnt_lines++ if ($realcnt != 0);
2930 # Verify the existence of a commit log if appropriate
2931 # 2 is used because a $signature is counted in $commit_log_lines
2932 if ($in_commit_log) {
2933 if ($line !~ /^\s*$/) {
2934 $commit_log_lines++; #could be a $signature
2936 } elsif ($has_commit_log && $commit_log_lines < 2) {
2937 WARN("COMMIT_MESSAGE",
2938 "Missing commit description - Add an appropriate one\n");
2939 $commit_log_lines = 2; #warn only once
2942 # Check if the commit log has what seems like a diff which can confuse patch
2943 if ($in_commit_log && !$commit_log_has_diff &&
2944 (($line =~ m@^\s+diff\b.*a/([\w/]+)@ &&
2945 $line =~ m@^\s+diff\b.*a/[\w/]+\s+b/$1\b@) ||
2946 $line =~ m@^\s*(?:\-\-\-\s+a/|\+\+\+\s+b/)@ ||
2947 $line =~ m/^\s*\@\@ \-\d+,\d+ \+\d+,\d+ \@\@/)) {
2948 ERROR("DIFF_IN_COMMIT_MSG",
2949 "Avoid using diff content in the commit message - patch(1) might not work\n" . $herecurr);
2950 $commit_log_has_diff = 1;
2953 # Check for incorrect file permissions
2954 if ($line =~ /^new (file )?mode.*[7531]\d{0,2}$/) {
2955 my $permhere = $here . "FILE: $realfile\n";
2956 if ($realfile !~ m@scripts/@ &&
2957 $realfile !~ /\.(py|pl|awk|sh)$/) {
2958 ERROR("EXECUTE_PERMISSIONS",
2959 "do not set execute permissions for source files\n" . $permhere);
2963 # Check the patch for a From:
2964 if (decode("MIME-Header", $line) =~ /^From:\s*(.*)/) {
2966 my $curline = $linenr;
2967 while(defined($rawlines[$curline]) && ($rawlines[$curline++] =~ /^[ \t]\s*(.*)/)) {
2970 $author = encode("utf8", $author) if ($line =~ /=\?utf-8\?/i);
2972 $author = reformat_email($author);
2975 # Check the patch for a signoff:
2976 if ($line =~ /^\s*signed-off-by:\s*(.*)/i) {
2979 if ($author ne '' && $authorsignoff != 1) {
2980 if (same_email_addresses($1, $author)) {
2984 my ($email_name, $email_comment, $email_address, $comment1) = parse_email($ctx);
2985 my ($author_name, $author_comment, $author_address, $comment2) = parse_email($author);
2987 if (lc $email_address eq lc $author_address && $email_name eq $author_name) {
2990 } elsif (lc $email_address eq lc $author_address) {
2993 } elsif ($email_name eq $author_name) {
2997 my $address1 = $email_address;
2998 my $address2 = $author_address;
3000 if ($address1 =~ /(\S+)\+\S+(\@.*)/) {
3003 if ($address2 =~ /(\S+)\+\S+(\@.*)/) {
3006 if ($address1 eq $address2) {
3014 # Check for patch separator
3015 if ($line =~ /^---$/) {
3016 $has_patch_separator = 1;
3020 # Check if MAINTAINERS is being updated. If so, there's probably no need to
3021 # emit the "does MAINTAINERS need updating?" message on file add/move/delete
3022 if ($line =~ /^\s*MAINTAINERS\s*\|/) {
3023 $reported_maintainer_file = 1;
3026 # Check signature styles
3027 if (!$in_header_lines &&
3028 $line =~ /^(\s*)([a-z0-9_-]+by:|$signature_tags)(\s*)(.*)/i) {
3029 my $space_before = $1;
3031 my $space_after = $3;
3033 my $ucfirst_sign_off = ucfirst(lc($sign_off));
3035 if ($sign_off !~ /$signature_tags/) {
3036 my $suggested_signature = find_standard_signature($sign_off);
3037 if ($suggested_signature eq "") {
3038 WARN("BAD_SIGN_OFF",
3039 "Non-standard signature: $sign_off\n" . $herecurr);
3041 if (WARN("BAD_SIGN_OFF",
3042 "Non-standard signature: '$sign_off' - perhaps '$suggested_signature'?\n" . $herecurr) &&
3044 $fixed[$fixlinenr] =~ s/$sign_off/$suggested_signature/;
3048 if (defined $space_before && $space_before ne "") {
3049 if (WARN("BAD_SIGN_OFF",
3050 "Do not use whitespace before $ucfirst_sign_off\n" . $herecurr) &&
3052 $fixed[$fixlinenr] =
3053 "$ucfirst_sign_off $email";
3056 if ($sign_off =~ /-by:$/i && $sign_off ne $ucfirst_sign_off) {
3057 if (WARN("BAD_SIGN_OFF",
3058 "'$ucfirst_sign_off' is the preferred signature form\n" . $herecurr) &&
3060 $fixed[$fixlinenr] =
3061 "$ucfirst_sign_off $email";
3065 if (!defined $space_after || $space_after ne " ") {
3066 if (WARN("BAD_SIGN_OFF",
3067 "Use a single space after $ucfirst_sign_off\n" . $herecurr) &&
3069 $fixed[$fixlinenr] =
3070 "$ucfirst_sign_off $email";
3074 my ($email_name, $name_comment, $email_address, $comment) = parse_email($email);
3075 my $suggested_email = format_email(($email_name, $name_comment, $email_address, $comment));
3076 if ($suggested_email eq "") {
3077 ERROR("BAD_SIGN_OFF",
3078 "Unrecognized email address: '$email'\n" . $herecurr);
3080 my $dequoted = $suggested_email;
3081 $dequoted =~ s/^"//;
3082 $dequoted =~ s/" </ </;
3083 # Don't force email to have quotes
3084 # Allow just an angle bracketed address
3085 if (!same_email_addresses($email, $suggested_email)) {
3086 if (WARN("BAD_SIGN_OFF",
3087 "email address '$email' might be better as '$suggested_email'\n" . $herecurr) &&
3089 $fixed[$fixlinenr] =~ s/\Q$email\E/$suggested_email/;
3093 # Address part shouldn't have comments
3094 my $stripped_address = $email_address;
3095 $stripped_address =~ s/\([^\(\)]*\)//g;
3096 if ($email_address ne $stripped_address) {
3097 if (WARN("BAD_SIGN_OFF",
3098 "address part of email should not have comments: '$email_address'\n" . $herecurr) &&
3100 $fixed[$fixlinenr] =~ s/\Q$email_address\E/$stripped_address/;
3104 # Only one name comment should be allowed
3105 my $comment_count = () = $name_comment =~ /\([^\)]+\)/g;
3106 if ($comment_count > 1) {
3107 WARN("BAD_SIGN_OFF",
3108 "Use a single name comment in email: '$email'\n" . $herecurr);
3112 # stable@vger.kernel.org or stable@kernel.org shouldn't
3113 # have an email name. In addition comments should strictly
3115 if ($email =~ /^.*stable\@(?:vger\.)?kernel\.org/i) {
3116 if (($comment ne "" && $comment !~ /^#.+/) ||
3117 ($email_name ne "")) {
3118 my $cur_name = $email_name;
3119 my $new_comment = $comment;
3120 $cur_name =~ s/[a-zA-Z\s\-\"]+//g;
3122 # Remove brackets enclosing comment text
3123 # and # from start of comments to get comment text
3124 $new_comment =~ s/^\((.*)\)$/$1/;
3125 $new_comment =~ s/^\[(.*)\]$/$1/;
3126 $new_comment =~ s/^[\s\#]+|\s+$//g;
3128 $new_comment = trim("$new_comment $cur_name") if ($cur_name ne $new_comment);
3129 $new_comment = " # $new_comment" if ($new_comment ne "");
3130 my $new_email = "$email_address$new_comment";
3132 if (WARN("BAD_STABLE_ADDRESS_STYLE",
3133 "Invalid email format for stable: '$email', prefer '$new_email'\n" . $herecurr) &&
3135 $fixed[$fixlinenr] =~ s/\Q$email\E/$new_email/;
3138 } elsif ($comment ne "" && $comment !~ /^(?:#.+|\(.+\))$/) {
3139 my $new_comment = $comment;
3141 # Extract comment text from within brackets or
3142 # c89 style /*...*/ comments
3143 $new_comment =~ s/^\[(.*)\]$/$1/;
3144 $new_comment =~ s/^\/\*(.*)\*\/$/$1/;
3146 $new_comment = trim($new_comment);
3147 $new_comment =~ s/^[^\w]$//; # Single lettered comment with non word character is usually a typo
3148 $new_comment = "($new_comment)" if ($new_comment ne "");
3149 my $new_email = format_email($email_name, $name_comment, $email_address, $new_comment);
3151 if (WARN("BAD_SIGN_OFF",
3152 "Unexpected content after email: '$email', should be: '$new_email'\n" . $herecurr) &&
3154 $fixed[$fixlinenr] =~ s/\Q$email\E/$new_email/;
3159 # Check for duplicate signatures
3160 my $sig_nospace = $line;
3161 $sig_nospace =~ s/\s//g;
3162 $sig_nospace = lc($sig_nospace);
3163 if (defined $signatures{$sig_nospace}) {
3164 WARN("BAD_SIGN_OFF",
3165 "Duplicate signature\n" . $herecurr);
3167 $signatures{$sig_nospace} = 1;
3170 # Check Co-developed-by: immediately followed by Signed-off-by: with same name and email
3171 if ($sign_off =~ /^co-developed-by:$/i) {
3172 if ($email eq $author) {
3173 WARN("BAD_SIGN_OFF",
3174 "Co-developed-by: should not be used to attribute nominal patch author '$author'\n" . "$here\n" . $rawline);
3176 if (!defined $lines[$linenr]) {
3177 WARN("BAD_SIGN_OFF",
3178 "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline);
3179 } elsif ($rawlines[$linenr] !~ /^\s*signed-off-by:\s*(.*)/i) {
3180 WARN("BAD_SIGN_OFF",
3181 "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]);
3182 } elsif ($1 ne $email) {
3183 WARN("BAD_SIGN_OFF",
3184 "Co-developed-by and Signed-off-by: name/email do not match \n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]);
3189 # Check email subject for common tools that don't need to be mentioned
3190 if ($in_header_lines &&
3191 $line =~ /^Subject:.*\b(?:checkpatch|sparse|smatch)\b[^:]/i) {
3192 WARN("EMAIL_SUBJECT",
3193 "A patch subject line should describe the change not the tool that found it\n" . $herecurr);
3196 # Check for Gerrit Change-Ids not in any patch context
3197 if ($realfile eq '' && !$has_patch_separator && $line =~ /^\s*change-id:/i) {
3198 if (ERROR("GERRIT_CHANGE_ID",
3199 "Remove Gerrit Change-Id's before submitting upstream\n" . $herecurr) &&
3201 fix_delete_line($fixlinenr, $rawline);
3205 # Check if the commit log is in a possible stack dump
3206 if ($in_commit_log && !$commit_log_possible_stack_dump &&
3207 ($line =~ /^\s*(?:WARNING:|BUG:)/ ||
3208 $line =~ /^\s*\[\s*\d+\.\d{6,6}\s*\]/ ||
3210 $line =~ /^\s*\[\<[0-9a-fA-F]{8,}\>\]/) ||
3211 $line =~ /^(?:\s+\w+:\s+[0-9a-fA-F]+){3,3}/ ||
3212 $line =~ /^\s*\#\d+\s*\[[0-9a-fA-F]+\]\s*\w+ at [0-9a-fA-F]+/) {
3213 # stack dump address styles
3214 $commit_log_possible_stack_dump = 1;
3217 # Check for line lengths > 75 in commit log, warn once
3218 if ($in_commit_log && !$commit_log_long_line &&
3219 length($line) > 75 &&
3220 !($line =~ /^\s*[a-zA-Z0-9_\/\.]+\s+\|\s+\d+/ ||
3221 # file delta changes
3222 $line =~ /^\s*(?:[\w\.\-\+]*\/)++[\w\.\-\+]+:/ ||
3224 $line =~ /^\s*(?:Fixes:|Link:|$signature_tags)/i ||
3225 # A Fixes: or Link: line or signature tag line
3226 $commit_log_possible_stack_dump)) {
3227 WARN("COMMIT_LOG_LONG_LINE",
3228 "Possible unwrapped commit description (prefer a maximum 75 chars per line)\n" . $herecurr);
3229 $commit_log_long_line = 1;
3232 # Reset possible stack dump if a blank line is found
3233 if ($in_commit_log && $commit_log_possible_stack_dump &&
3235 $commit_log_possible_stack_dump = 0;
3238 # Check for lines starting with a #
3239 if ($in_commit_log && $line =~ /^#/) {
3240 if (WARN("COMMIT_COMMENT_SYMBOL",
3241 "Commit log lines starting with '#' are dropped by git as comments\n" . $herecurr) &&
3243 $fixed[$fixlinenr] =~ s/^/ /;
3247 # Check for git id commit length and improperly formed commit descriptions
3248 # A correctly formed commit description is:
3249 # commit <SHA-1 hash length 12+ chars> ("Complete commit subject")
3250 # with the commit subject '("' prefix and '")' suffix
3251 # This is a fairly compilicated block as it tests for what appears to be
3252 # bare SHA-1 hash with minimum length of 5. It also avoids several types of
3253 # possible SHA-1 matches.
3254 # A commit match can span multiple lines so this block attempts to find a
3255 # complete typical commit on a maximum of 3 lines
3256 if ($perl_version_ok &&
3257 $in_commit_log && !$commit_log_possible_stack_dump &&
3258 $line !~ /^\s*(?:Link|Patchwork|http|https|BugLink|base-commit):/i &&
3259 $line !~ /^This reverts commit [0-9a-f]{7,40}/ &&
3260 (($line =~ /\bcommit\s+[0-9a-f]{5,}\b/i ||
3261 ($line =~ /\bcommit\s*$/i && defined($rawlines[$linenr]) && $rawlines[$linenr] =~ /^\s*[0-9a-f]{5,}\b/i)) ||
3262 ($line =~ /(?:\s|^)[0-9a-f]{12,40}(?:[\s"'\(\[]|$)/i &&
3263 $line !~ /[\<\[][0-9a-f]{12,40}[\>\]]/i &&
3264 $line !~ /\bfixes:\s*[0-9a-f]{12,40}/i))) {
3265 my $init_char = "c";
3266 my $orig_commit = "";
3271 my $id = '0123456789ab';
3272 my $orig_desc = "commit description";
3273 my $description = "";
3274 my $herectx = $herecurr;
3279 if ($line =~ /(?:\bcommit\s+[0-9a-f]{5,}|\bcommit\s*$)/i) {
3280 for (my $n = 0; $n < 2; $n++) {
3281 if ($input =~ /\bcommit\s+[0-9a-f]{5,}\s*($balanced_parens)/i) {
3284 # Always strip leading/trailing parens then double quotes if existing
3285 $orig_desc = substr($orig_desc, 1, -1);
3286 if ($orig_desc =~ /^".*"$/) {
3287 $orig_desc = substr($orig_desc, 1, -1);
3292 last if ($#lines < $linenr + $n);
3293 $input .= " " . trim($rawlines[$linenr + $n]);
3294 $herectx .= "$rawlines[$linenr + $n]\n";
3296 $herectx = $herecurr if (!$has_parens);
3299 if ($input =~ /\b(c)ommit\s+([0-9a-f]{5,})\b/i) {
3301 $orig_commit = lc($2);
3302 $short = 0 if ($input =~ /\bcommit\s+[0-9a-f]{12,40}/i);
3303 $long = 1 if ($input =~ /\bcommit\s+[0-9a-f]{41,}/i);
3304 $space = 0 if ($input =~ /\bcommit [0-9a-f]/i);
3305 $case = 0 if ($input =~ /\b[Cc]ommit\s+[0-9a-f]{5,40}[^A-F]/);
3306 } elsif ($input =~ /\b([0-9a-f]{12,40})\b/i) {
3307 $orig_commit = lc($1);
3310 ($id, $description) = git_commit_info($orig_commit,
3314 ($short || $long || $space || $case || ($orig_desc ne $description) || !$has_quotes) &&
3315 $last_git_commit_id_linenr != $linenr - 1) {
3316 ERROR("GIT_COMMIT_ID",
3317 "Please use git commit description style 'commit <12+ chars of sha1> (\"<title line>\")' - ie: '${init_char}ommit $id (\"$description\")'\n" . $herectx);
3319 #don't report the next line if this line ends in commit and the sha1 hash is the next line
3320 $last_git_commit_id_linenr = $linenr if ($line =~ /\bcommit\s*$/i);
3323 # Check for added, moved or deleted files
3324 if (!$reported_maintainer_file && !$in_commit_log &&
3325 ($line =~ /^(?:new|deleted) file mode\s*\d+\s*$/ ||
3326 $line =~ /^rename (?:from|to) [\w\/\.\-]+\s*$/ ||
3327 ($line =~ /\{\s*([\w\/\.\-]*)\s*\=\>\s*([\w\/\.\-]*)\s*\}/ &&
3328 (defined($1) || defined($2))))) {
3330 $reported_maintainer_file = 1;
3331 WARN("FILE_PATH_CHANGES",
3332 "added, moved or deleted file(s), does MAINTAINERS need updating?\n" . $herecurr);
3335 # Check for adding new DT bindings not in schema format
3336 if (!$in_commit_log &&
3337 ($line =~ /^new file mode\s*\d+\s*$/) &&
3338 ($realfile =~ m@^Documentation/devicetree/bindings/.*\.txt$@)) {
3339 WARN("DT_SCHEMA_BINDING_PATCH",
3340 "DT bindings should be in DT schema format. See: Documentation/devicetree/bindings/writing-schema.rst\n");
3343 # Check for wrappage within a valid hunk of the file
3344 if ($realcnt != 0 && $line !~ m{^(?:\+|-| |\\ No newline|$)}) {
3345 ERROR("CORRUPTED_PATCH",
3346 "patch seems to be corrupt (line wrapped?)\n" .
3347 $herecurr) if (!$emitted_corrupt++);
3350 # UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
3351 if (($realfile =~ /^$/ || $line =~ /^\+/) &&
3352 $rawline !~ m/^$UTF8*$/) {
3353 my ($utf8_prefix) = ($rawline =~ /^($UTF8*)/);
3355 my $blank = copy_spacing($rawline);
3356 my $ptr = substr($blank, 0, length($utf8_prefix)) . "^";
3357 my $hereptr = "$hereline$ptr\n";
3360 "Invalid UTF-8, patch and commit message should be encoded in UTF-8\n" . $hereptr);
3363 # Check if it's the start of a commit log
3364 # (not a header line and we haven't seen the patch filename)
3365 if ($in_header_lines && $realfile =~ /^$/ &&
3366 !($rawline =~ /^\s+(?:\S|$)/ ||
3367 $rawline =~ /^(?:commit\b|from\b|[\w-]+:)/i)) {
3368 $in_header_lines = 0;
3370 $has_commit_log = 1;
3373 # Check if there is UTF-8 in a commit log when a mail header has explicitly
3374 # declined it, i.e defined some charset where it is missing.
3375 if ($in_header_lines &&
3376 $rawline =~ /^Content-Type:.+charset="(.+)".*$/ &&
3378 $non_utf8_charset = 1;
3381 if ($in_commit_log && $non_utf8_charset && $realfile =~ /^$/ &&
3382 $rawline =~ /$NON_ASCII_UTF8/) {
3383 WARN("UTF8_BEFORE_PATCH",
3384 "8-bit UTF-8 used in possible commit log\n" . $herecurr);
3387 # Check for absolute kernel paths in commit message
3388 if ($tree && $in_commit_log) {
3389 while ($line =~ m{(?:^|\s)(/\S*)}g) {
3392 if ($file =~ m{^(.*?)(?::\d+)+:?$} &&
3393 check_absolute_file($1, $herecurr)) {
3396 check_absolute_file($file, $herecurr);
3401 # Check for various typo / spelling mistakes
3402 if (defined($misspellings) &&
3403 # OpenOCD specific: Begin: don't check spelling on spelling_file
3404 index($spelling_file, $realfile) + length($realfile) != length($spelling_file) &&
3405 # OpenOCD specific: End
3406 ($in_commit_log || $line =~ /^(?:\+|Subject:)/i)) {
3407 while ($rawline =~ /(?:^|[^\w\-'`])($misspellings)(?:[^\w\-'`]|$)/gi) {
3409 my $blank = copy_spacing($rawline);
3410 my $ptr = substr($blank, 0, $-[1]) . "^" x length($typo);
3411 my $hereptr = "$hereline$ptr\n";
3412 my $typo_fix = $spelling_fix{lc($typo)};
3413 $typo_fix = ucfirst($typo_fix) if ($typo =~ /^[A-Z]/);
3414 $typo_fix = uc($typo_fix) if ($typo =~ /^[A-Z]+$/);
3415 my $msg_level = \&WARN;
3416 $msg_level = \&CHK if ($file);
3417 if (&{$msg_level}("TYPO_SPELLING",
3418 "'$typo' may be misspelled - perhaps '$typo_fix'?\n" . $hereptr) &&
3420 $fixed[$fixlinenr] =~ s/(^|[^A-Za-z@])($typo)($|[^A-Za-z@])/$1$typo_fix$3/;
3425 # check for invalid commit id
3426 if ($in_commit_log && $line =~ /(^fixes:|\bcommit)\s+([0-9a-f]{6,40})\b/i) {
3429 ($id, $description) = git_commit_info($2, undef, undef);
3430 if (!defined($id)) {
3431 WARN("UNKNOWN_COMMIT_ID",
3432 "Unknown commit id '$2', maybe rebased or not pulled?\n" . $herecurr);
3436 # check for repeated words separated by a single space
3437 # avoid false positive from list command eg, '-rw-r--r-- 1 root root'
3438 if (($rawline =~ /^\+/ || $in_commit_log) &&
3439 $rawline !~ /[bcCdDlMnpPs\?-][rwxsStT-]{9}/) {
3440 pos($rawline) = 1 if (!$in_commit_log);
3441 while ($rawline =~ /\b($word_pattern) (?=($word_pattern))/g) {
3445 my $start_pos = $-[1];
3446 my $end_pos = $+[2];
3447 if ($first =~ /(?:struct|union|enum)/) {
3448 pos($rawline) += length($first) + length($second) + 1;
3452 next if (lc($first) ne lc($second));
3453 next if ($first eq 'long');
3455 # check for character before and after the word matches
3456 my $start_char = '';
3458 $start_char = substr($rawline, $start_pos - 1, 1) if ($start_pos > ($in_commit_log ? 0 : 1));
3459 $end_char = substr($rawline, $end_pos, 1) if ($end_pos < length($rawline));
3461 next if ($start_char =~ /^\S$/);
3462 next if (index(" \t.,;?!", $end_char) == -1);
3464 # avoid repeating hex occurrences like 'ff ff fe 09 ...'
3465 if ($first =~ /\b[0-9a-f]{2,}\b/i) {
3466 next if (!exists($allow_repeated_words{lc($first)}));
3469 if (WARN("REPEATED_WORD",
3470 "Possible repeated word: '$first'\n" . $herecurr) &&
3472 $fixed[$fixlinenr] =~ s/\b$first $second\b/$first/;
3476 # if it's a repeated word on consecutive lines in a comment block
3477 if ($prevline =~ /$;+\s*$/ &&
3478 $prevrawline =~ /($word_pattern)\s*$/) {
3480 if ($rawline =~ /^\+\s*\*\s*$last_word /) {
3481 if (WARN("REPEATED_WORD",
3482 "Possible repeated word: '$last_word'\n" . $hereprev) &&
3484 $fixed[$fixlinenr] =~ s/(\+\s*\*\s*)$last_word /$1/;
3490 # ignore non-hunk lines and lines being removed
3491 next if (!$hunk_line || $line =~ /^-/);
3493 #trailing whitespace
3494 if ($line =~ /^\+.*\015/) {
3495 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3496 if (ERROR("DOS_LINE_ENDINGS",
3497 "DOS line endings\n" . $herevet) &&
3499 $fixed[$fixlinenr] =~ s/[\s\015]+$//;
3501 } elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) {
3502 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3503 if (ERROR("TRAILING_WHITESPACE",
3504 "trailing whitespace\n" . $herevet) &&
3506 $fixed[$fixlinenr] =~ s/\s+$//;
3512 # Check for FSF mailing addresses.
3513 if ($rawline =~ /\bwrite to the Free/i ||
3514 $rawline =~ /\b675\s+Mass\s+Ave/i ||
3515 $rawline =~ /\b59\s+Temple\s+Pl/i ||
3516 $rawline =~ /\b51\s+Franklin\s+St/i) {
3517 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3518 my $msg_level = \&ERROR;
3519 $msg_level = \&CHK if ($file);
3520 &{$msg_level}("FSF_MAILING_ADDRESS",
3521 "Do not include the paragraph about writing to the Free Software Foundation's mailing address from the sample GPL notice. The FSF has changed addresses in the past, and may do so again. OpenOCD already includes a copy of the GPL.\n" . $herevet)
3524 # check for Kconfig help text having a real description
3525 # Only applies when adding the entry originally, after that we do not have
3526 # sufficient context to determine whether it is indeed long enough.
3527 if ($realfile =~ /Kconfig/ &&
3528 # 'choice' is usually the last thing on the line (though
3529 # Kconfig supports named choices), so use a word boundary
3530 # (\b) rather than a whitespace character (\s)
3531 $line =~ /^\+\s*(?:config|menuconfig|choice)\b/) {
3535 my $help_length = 0;
3536 while (defined $lines[$ln]) {
3537 my $f = $lines[$ln++];
3539 next if ($f =~ /^-/);
3540 last if ($f !~ /^[\+ ]/); # !patch context
3542 if ($f =~ /^\+\s*(?:bool|tristate|prompt)\s*["']/) {
3546 if ($f =~ /^\+\s*help\s*$/) {
3551 $f =~ s/^.//; # strip patch context [+ ]
3552 $f =~ s/#.*//; # strip # directives
3553 $f =~ s/^\s+//; # strip leading blanks
3554 next if ($f =~ /^$/); # skip blank lines
3556 # At the end of this Kconfig block:
3557 # This only checks context lines in the patch
3558 # and so hopefully shouldn't trigger false
3559 # positives, even though some of these are
3560 # common words in help texts
3561 if ($f =~ /^(?:config|menuconfig|choice|endchoice|
3562 if|endif|menu|endmenu|source)\b/x) {
3565 $help_length++ if ($has_help);
3568 $help_length < $min_conf_desc_length) {
3569 my $stat_real = get_stat_real($linenr, $ln - 1);
3570 WARN("CONFIG_DESCRIPTION",
3571 "please write a help paragraph that fully describes the config symbol\n" . "$here\n$stat_real\n");
3575 # check MAINTAINERS entries
3576 if ($realfile =~ /^MAINTAINERS$/) {
3577 # check MAINTAINERS entries for the right form
3578 if ($rawline =~ /^\+[A-Z]:/ &&
3579 $rawline !~ /^\+[A-Z]:\t\S/) {
3580 if (WARN("MAINTAINERS_STYLE",
3581 "MAINTAINERS entries use one tab after TYPE:\n" . $herecurr) &&
3583 $fixed[$fixlinenr] =~ s/^(\+[A-Z]):\s*/$1:\t/;
3586 # check MAINTAINERS entries for the right ordering too
3587 my $preferred_order = 'MRLSWQBCPTFXNK';
3588 if ($rawline =~ /^\+[A-Z]:/ &&
3589 $prevrawline =~ /^[\+ ][A-Z]:/) {
3590 $rawline =~ /^\+([A-Z]):\s*(.*)/;
3593 $prevrawline =~ /^[\+ ]([A-Z]):\s*(.*)/;
3596 my $curindex = index($preferred_order, $cur);
3597 my $previndex = index($preferred_order, $prev);
3598 if ($curindex < 0) {
3599 WARN("MAINTAINERS_STYLE",
3600 "Unknown MAINTAINERS entry type: '$cur'\n" . $herecurr);
3602 if ($previndex >= 0 && $curindex < $previndex) {
3603 WARN("MAINTAINERS_STYLE",
3604 "Misordered MAINTAINERS entry - list '$cur:' before '$prev:'\n" . $hereprev);
3605 } elsif ((($prev eq 'F' && $cur eq 'F') ||
3606 ($prev eq 'X' && $cur eq 'X')) &&
3607 ($prevval cmp $curval) > 0) {
3608 WARN("MAINTAINERS_STYLE",
3609 "Misordered MAINTAINERS entry - list file patterns in alphabetic order\n" . $hereprev);
3615 if (($realfile =~ /Makefile.*/ || $realfile =~ /Kbuild.*/) &&
3616 ($line =~ /\+(EXTRA_[A-Z]+FLAGS).*/)) {
3619 'EXTRA_AFLAGS' => 'asflags-y',
3620 'EXTRA_CFLAGS' => 'ccflags-y',
3621 'EXTRA_CPPFLAGS' => 'cppflags-y',
3622 'EXTRA_LDFLAGS' => 'ldflags-y',
3625 WARN("DEPRECATED_VARIABLE",
3626 "Use of $flag is deprecated, please use \`$replacement->{$flag} instead.\n" . $herecurr) if ($replacement->{$flag});
3629 # check for DT compatible documentation
3630 if (defined $root &&
3631 (($realfile =~ /\.dtsi?$/ && $line =~ /^\+\s*compatible\s*=\s*\"/) ||
3632 ($realfile =~ /\.[ch]$/ && $line =~ /^\+.*\.compatible\s*=\s*\"/))) {
3634 my @compats = $rawline =~ /\"([a-zA-Z0-9\-\,\.\+_]+)\"/g;
3636 my $dt_path = $root . "/Documentation/devicetree/bindings/";
3637 my $vp_file = $dt_path . "vendor-prefixes.yaml";
3639 foreach my $compat (@compats) {
3640 my $compat2 = $compat;
3641 $compat2 =~ s/\,[a-zA-Z0-9]*\-/\,<\.\*>\-/;
3642 my $compat3 = $compat;
3643 $compat3 =~ s/\,([a-z]*)[0-9]*\-/\,$1<\.\*>\-/;
3644 `grep -Erq "$compat|$compat2|$compat3" $dt_path`;
3646 WARN("UNDOCUMENTED_DT_STRING",
3647 "DT compatible string \"$compat\" appears un-documented -- check $dt_path\n" . $herecurr);
3650 next if $compat !~ /^([a-zA-Z0-9\-]+)\,/;
3652 `grep -Eq "\\"\\^\Q$vendor\E,\\.\\*\\":" $vp_file`;
3654 WARN("UNDOCUMENTED_DT_STRING",
3655 "DT compatible string vendor \"$vendor\" appears un-documented -- check $vp_file\n" . $herecurr);
3660 # check for using SPDX license tag at beginning of files
3661 if ($realline == $checklicenseline) {
3662 if ($rawline =~ /^[ \+]\s*\#\!\s*\//) {
3663 $checklicenseline = 2;
3664 } elsif ($rawline =~ /^\+/) {
3666 if ($realfile =~ /\.(h|s|S)$/) {
3668 } elsif ($realfile =~ /\.(c|dts|dtsi)$/) {
3670 } elsif (($checklicenseline == 2) || $realfile =~ /\.(sh|pl|py|awk|tc|yaml)$/) {
3672 } elsif ($realfile =~ /\.rst$/) {
3674 # OpenOCD specific: Begin
3675 } elsif ($realfile =~ /\.(am|cfg|tcl)$/) {
3677 # OpenOCD specific: End
3680 # check SPDX comment style for .[chsS] files
3681 if ($realfile =~ /\.[chsS]$/ &&
3682 $rawline =~ /SPDX-License-Identifier:/ &&
3683 $rawline !~ m@^\+\s*\Q$comment\E\s*@) {
3684 WARN("SPDX_LICENSE_TAG",
3685 "Improper SPDX comment style for '$realfile', please use '$comment' instead\n" . $herecurr);
3688 if ($comment !~ /^$/ &&
3689 $rawline !~ m@^\+\Q$comment\E SPDX-License-Identifier: @) {
3690 WARN("SPDX_LICENSE_TAG",
3691 "Missing or malformed SPDX-License-Identifier tag in line $checklicenseline\n" . $herecurr);
3692 } elsif ($rawline =~ /(SPDX-License-Identifier: .*)/) {
3693 my $spdx_license = $1;
3694 if (!is_SPDX_License_valid($spdx_license)) {
3695 WARN("SPDX_LICENSE_TAG",
3696 "'$spdx_license' is not supported in LICENSES/...\n" . $herecurr);
3698 if ($realfile =~ m@^Documentation/devicetree/bindings/@ &&
3699 not $spdx_license =~ /GPL-2\.0.*BSD-2-Clause/) {
3700 my $msg_level = \&WARN;
3701 $msg_level = \&CHK if ($file);
3702 if (&{$msg_level}("SPDX_LICENSE_TAG",
3704 "DT binding documents should be licensed (GPL-2.0-only OR BSD-2-Clause)\n" . $herecurr) &&
3706 $fixed[$fixlinenr] =~ s/SPDX-License-Identifier: .*/SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)/;
3713 # check for embedded filenames
3714 if ($rawline =~ /^\+.*\Q$realfile\E/) {
3715 WARN("EMBEDDED_FILENAME",
3716 "It's generally not useful to have the filename in the file\n" . $herecurr);
3719 # check we are in a valid source file if not then ignore this hunk
3720 next if ($realfile !~ /\.(h|c|s|S|sh|dtsi|dts)$/);
3722 # check for using SPDX-License-Identifier on the wrong line number
3723 if ($realline != $checklicenseline &&
3724 $rawline =~ /\bSPDX-License-Identifier:/ &&
3725 substr($line, @-, @+ - @-) eq "$;" x (@+ - @-)) {
3726 WARN("SPDX_LICENSE_TAG",
3727 "Misplaced SPDX-License-Identifier tag - use line $checklicenseline instead\n" . $herecurr);
3730 # line length limit (with some exclusions)
3732 # There are a few types of lines that may extend beyond $max_line_length:
3733 # logging functions like pr_info that end in a string
3734 # lines with a single string
3735 # #defines that are a single string
3736 # lines with an RFC3986 like URL
3738 # There are 3 different line length message types:
3739 # LONG_LINE_COMMENT a comment starts before but extends beyond $max_line_length
3740 # LONG_LINE_STRING a string starts before but extends beyond $max_line_length
3741 # LONG_LINE all other lines longer than $max_line_length
3743 # if LONG_LINE is ignored, the other 2 types are also ignored
3746 if ($line =~ /^\+/ && $length > $max_line_length) {
3747 my $msg_type = "LONG_LINE";
3749 # Check the allowed long line types first
3751 # logging functions that end in a string that starts
3752 # before $max_line_length
3753 if ($line =~ /^\+\s*$logFunctions\s*\(\s*(?:(?:KERN_\S+\s*|[^"]*))?($String\s*(?:|,|\)\s*;)\s*)$/ &&
3754 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) {
3757 # lines with only strings (w/ possible termination)
3758 # #defines with only strings
3759 } elsif ($line =~ /^\+\s*$String\s*(?:\s*|,|\)\s*;)\s*$/ ||
3760 $line =~ /^\+\s*#\s*define\s+\w+\s+$String$/) {
3763 # More special cases
3764 } elsif ($line =~ /^\+.*\bEFI_GUID\s*\(/ ||
3765 $line =~ /^\+\s*(?:\w+)?\s*DEFINE_PER_CPU/) {
3768 # URL ($rawline is used in case the URL is in a comment)
3769 } elsif ($rawline =~ /^\+.*\b[a-z][\w\.\+\-]*:\/\/\S+/i) {
3772 # Otherwise set the alternate message types
3774 # a comment starts before $max_line_length
3775 } elsif ($line =~ /($;[\s$;]*)$/ &&
3776 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) {
3777 $msg_type = "LONG_LINE_COMMENT"
3779 # a quoted string starts before $max_line_length
3780 } elsif ($sline =~ /\s*($String(?:\s*(?:\\|,\s*|\)\s*;\s*))?)$/ &&
3781 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) {
3782 $msg_type = "LONG_LINE_STRING"
3785 if ($msg_type ne "" &&
3786 (show_type("LONG_LINE") || show_type($msg_type))) {
3787 my $msg_level = \&WARN;
3788 $msg_level = \&CHK if ($file);
3789 &{$msg_level}($msg_type,
3790 "line length of $length exceeds $max_line_length columns\n" . $herecurr);
3794 # check for adding lines without a newline.
3795 if ($line =~ /^\+/ && defined $lines[$linenr] && $lines[$linenr] =~ /^\\ No newline at end of file/) {
3796 if (WARN("MISSING_EOF_NEWLINE",
3797 "adding a line without newline at end of file\n" . $herecurr) &&
3799 fix_delete_line($fixlinenr+1, "No newline at end of file");
3803 # check for .L prefix local symbols in .S files
3804 if ($realfile =~ /\.S$/ &&
3805 $line =~ /^\+\s*(?:[A-Z]+_)?SYM_[A-Z]+_(?:START|END)(?:_[A-Z_]+)?\s*\(\s*\.L/) {
3806 WARN("AVOID_L_PREFIX",
3807 "Avoid using '.L' prefixed local symbol names for denoting a range of code via 'SYM_*_START/END' annotations; see Documentation/asm-annotations.rst\n" . $herecurr);
3810 # check we are in a valid source file C or perl if not then ignore this hunk
3811 next if ($realfile !~ /\.(h|c|pl|dtsi|dts)$/);
3813 # at the beginning of a line any tabs must come first and anything
3814 # more than $tabsize must use tabs.
3815 if ($rawline =~ /^\+\s* \t\s*\S/ ||
3816 $rawline =~ /^\+\s* \s*/) {
3817 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3819 if (ERROR("CODE_INDENT",
3820 "code indent should use tabs where possible\n" . $herevet) &&
3822 $fixed[$fixlinenr] =~ s/^\+([ \t]+)/"\+" . tabify($1)/e;
3826 # check for space before tabs.
3827 if ($rawline =~ /^\+/ && $rawline =~ / \t/) {
3828 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3829 if (WARN("SPACE_BEFORE_TAB",
3830 "please, no space before tabs\n" . $herevet) &&
3832 while ($fixed[$fixlinenr] =~
3833 s/(^\+.*) {$tabsize,$tabsize}\t/$1\t\t/) {}
3834 while ($fixed[$fixlinenr] =~
3835 s/(^\+.*) +\t/$1\t/) {}
3839 # check for assignments on the start of a line
3840 if ($sline =~ /^\+\s+($Assignment)[^=]/) {
3842 if (CHK("ASSIGNMENT_CONTINUATIONS",
3843 "Assignment operator '$1' should be on the previous line\n" . $hereprev) &&
3844 $fix && $prevrawline =~ /^\+/) {
3845 # add assignment operator to the previous line, remove from current line
3846 $fixed[$fixlinenr - 1] .= " $operator";
3847 $fixed[$fixlinenr] =~ s/\Q$operator\E\s*//;
3851 # check for && or || at the start of a line
3852 if ($rawline =~ /^\+\s*(&&|\|\|)/) {
3854 if (CHK("LOGICAL_CONTINUATIONS",
3855 "Logical continuations should be on the previous line\n" . $hereprev) &&
3856 $fix && $prevrawline =~ /^\+/) {
3857 # insert logical operator at last non-comment, non-whitepsace char on previous line
3858 $prevline =~ /[\s$;]*$/;
3859 my $line_end = substr($prevrawline, $-[0]);
3860 $fixed[$fixlinenr - 1] =~ s/\Q$line_end\E$/ $operator$line_end/;
3861 $fixed[$fixlinenr] =~ s/\Q$operator\E\s*//;
3865 # check indentation starts on a tab stop
3866 if ($perl_version_ok &&
3867 $sline =~ /^\+\t+( +)(?:$c90_Keywords\b|\{\s*$|\}\s*(?:else\b|while\b|\s*$)|$Declare\s*$Ident\s*[;=])/) {
3868 my $indent = length($1);
3869 if ($indent % $tabsize) {
3871 "Statements should start on a tabstop\n" . $herecurr) &&
3873 $fixed[$fixlinenr] =~ s@(^\+\t+) +@$1 . "\t" x ($indent/$tabsize)@e;
3878 # check multi-line statement indentation matches previous line
3879 if ($perl_version_ok &&
3880 $prevline =~ /^\+([ \t]*)((?:$c90_Keywords(?:\s+if)\s*)|(?:$Declare\s*)?(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*|(?:\*\s*)*$Lval\s*=\s*$Ident\s*)\(.*(\&\&|\|\||,)\s*$/) {
3881 $prevline =~ /^\+(\t*)(.*)$/;
3885 my $pos = pos_last_openparen($rest);
3887 $line =~ /^(\+| )([ \t]*)/;
3890 my $goodtabindent = $oldindent .
3891 "\t" x ($pos / $tabsize) .
3892 " " x ($pos % $tabsize);
3893 my $goodspaceindent = $oldindent . " " x $pos;
3895 if ($newindent ne $goodtabindent &&
3896 $newindent ne $goodspaceindent) {
3898 if (CHK("PARENTHESIS_ALIGNMENT",
3899 "Alignment should match open parenthesis\n" . $hereprev) &&
3900 $fix && $line =~ /^\+/) {
3901 $fixed[$fixlinenr] =~
3902 s/^\+[ \t]*/\+$goodtabindent/;
3908 # check for space after cast like "(int) foo" or "(struct foo) bar"
3909 # avoid checking a few false positives:
3910 # "sizeof(<type>)" or "__alignof__(<type>)"
3911 # function pointer declarations like "(*foo)(int) = bar;"
3912 # structure definitions like "(struct foo) { 0 };"
3913 # multiline macros that define functions
3914 # known attributes or the __attribute__ keyword
3915 if ($line =~ /^\+(.*)\(\s*$Type\s*\)([ \t]++)((?![={]|\\$|$Attribute|__attribute__))/ &&
3916 (!defined($1) || $1 !~ /\b(?:sizeof|__alignof__)\s*$/)) {
3918 "No space is necessary after a cast\n" . $herecurr) &&
3920 $fixed[$fixlinenr] =~
3921 s/(\(\s*$Type\s*\))[ \t]+/$1/;
3925 # Block comment styles
3926 # Networking with an initial /*
3927 if ($realfile =~ m@^(drivers/net/|net/)@ &&
3928 $prevrawline =~ /^\+[ \t]*\/\*[ \t]*$/ &&
3929 $rawline =~ /^\+[ \t]*\*/ &&
3930 $realline > 3) { # Do not warn about the initial copyright comment block after SPDX-License-Identifier
3931 WARN("NETWORKING_BLOCK_COMMENT_STYLE",
3932 "networking block comments don't use an empty /* line, use /* Comment...\n" . $hereprev);
3935 # Block comments use * on subsequent lines
3936 if ($prevline =~ /$;[ \t]*$/ && #ends in comment
3937 $prevrawline =~ /^\+.*?\/\*/ && #starting /*
3938 $prevrawline !~ /\*\/[ \t]*$/ && #no trailing */
3939 $rawline =~ /^\+/ && #line is new
3940 $rawline !~ /^\+[ \t]*\*/) { #no leading *
3941 WARN("BLOCK_COMMENT_STYLE",
3942 "Block comments use * on subsequent lines\n" . $hereprev);
3945 # Block comments use */ on trailing lines
3946 if ($rawline !~ m@^\+[ \t]*\*/[ \t]*$@ && #trailing */
3947 $rawline !~ m@^\+.*/\*.*\*/[ \t]*$@ && #inline /*...*/
3948 $rawline !~ m@^\+.*\*{2,}/[ \t]*$@ && #trailing **/
3949 $rawline =~ m@^\+[ \t]*.+\*\/[ \t]*$@) { #non blank */
3950 WARN("BLOCK_COMMENT_STYLE",
3951 "Block comments use a trailing */ on a separate line\n" . $herecurr);
3954 # Block comment * alignment
3955 if ($prevline =~ /$;[ \t]*$/ && #ends in comment
3956 $line =~ /^\+[ \t]*$;/ && #leading comment
3957 $rawline =~ /^\+[ \t]*\*/ && #leading *
3958 (($prevrawline =~ /^\+.*?\/\*/ && #leading /*
3959 $prevrawline !~ /\*\/[ \t]*$/) || #no trailing */
3960 $prevrawline =~ /^\+[ \t]*\*/)) { #leading *
3962 $prevrawline =~ m@^\+([ \t]*/?)\*@;
3964 $oldindent = expand_tabs($1);
3966 $prevrawline =~ m@^\+(.*/?)\*@;
3967 $oldindent = expand_tabs($1);
3969 $rawline =~ m@^\+([ \t]*)\*@;
3971 $newindent = expand_tabs($newindent);
3972 if (length($oldindent) ne length($newindent)) {
3973 WARN("BLOCK_COMMENT_STYLE",
3974 "Block comments should align the * on each line\n" . $hereprev);
3978 # check for missing blank lines after struct/union declarations
3979 # with exceptions for various attributes and macros
3980 if ($prevline =~ /^[\+ ]};?\s*$/ &&
3982 !($line =~ /^\+\s*$/ ||
3983 $line =~ /^\+\s*(?:EXPORT_SYMBOL|early_param)/ ||
3984 $line =~ /^\+\s*MODULE_/i ||
3985 $line =~ /^\+\s*\#\s*(?:end|elif|else)/ ||
3986 $line =~ /^\+[a-z_]*init/ ||
3987 $line =~ /^\+\s*(?:static\s+)?[A-Z_]*ATTR/ ||
3988 $line =~ /^\+\s*DECLARE/ ||
3989 $line =~ /^\+\s*builtin_[\w_]*driver/ ||
3990 $line =~ /^\+\s*__setup/)) {
3991 if (CHK("LINE_SPACING",
3992 "Please use a blank line after function/struct/union/enum declarations\n" . $hereprev) &&
3994 fix_insert_line($fixlinenr, "\+");
3998 # check for multiple consecutive blank lines
3999 if ($prevline =~ /^[\+ ]\s*$/ &&
4000 $line =~ /^\+\s*$/ &&
4001 $last_blank_line != ($linenr - 1)) {
4002 if (CHK("LINE_SPACING",
4003 "Please don't use multiple blank lines\n" . $hereprev) &&
4005 fix_delete_line($fixlinenr, $rawline);
4008 $last_blank_line = $linenr;
4011 # check for missing blank lines after declarations
4012 # (declarations must have the same indentation and not be at the start of line)
4013 if (($prevline =~ /\+(\s+)\S/) && $sline =~ /^\+$1\S/) {
4017 # remove $Attribute/$Sparse uses to simplify comparisons
4018 $sl =~ s/\b(?:$Attribute|$Sparse)\b//g;
4019 $pl =~ s/\b(?:$Attribute|$Sparse)\b//g;
4020 if (($pl =~ /^\+\s+$Declare\s*$Ident\s*[=,;:\[]/ ||
4021 # function pointer declarations
4022 $pl =~ /^\+\s+$Declare\s*\(\s*\*\s*$Ident\s*\)\s*[=,;:\[\(]/ ||
4023 # foo bar; where foo is some local typedef or #define
4024 $pl =~ /^\+\s+$Ident(?:\s+|\s*\*\s*)$Ident\s*[=,;\[]/ ||
4025 # known declaration macros
4026 $pl =~ /^\+\s+$declaration_macros/) &&
4027 # for "else if" which can look like "$Ident $Ident"
4028 !($pl =~ /^\+\s+$c90_Keywords\b/ ||
4029 # other possible extensions of declaration lines
4030 $pl =~ /(?:$Compare|$Assignment|$Operators)\s*$/ ||
4031 # not starting a section or a macro "\" extended line
4032 $pl =~ /(?:\{\s*|\\)$/) &&
4033 # looks like a declaration
4034 !($sl =~ /^\+\s+$Declare\s*$Ident\s*[=,;:\[]/ ||
4035 # function pointer declarations
4036 $sl =~ /^\+\s+$Declare\s*\(\s*\*\s*$Ident\s*\)\s*[=,;:\[\(]/ ||
4037 # foo bar; where foo is some local typedef or #define
4038 $sl =~ /^\+\s+$Ident(?:\s+|\s*\*\s*)$Ident\s*[=,;\[]/ ||
4039 # known declaration macros
4040 $sl =~ /^\+\s+$declaration_macros/ ||
4041 # start of struct or union or enum
4042 $sl =~ /^\+\s+(?:static\s+)?(?:const\s+)?(?:union|struct|enum|typedef)\b/ ||
4043 # start or end of block or continuation of declaration
4044 $sl =~ /^\+\s+(?:$|[\{\}\.\#\"\?\:\(\[])/ ||
4045 # bitfield continuation
4046 $sl =~ /^\+\s+$Ident\s*:\s*\d+\s*[,;]/ ||
4047 # other possible extensions of declaration lines
4048 $sl =~ /^\+\s+\(?\s*(?:$Compare|$Assignment|$Operators)/)) {
4049 if (WARN("LINE_SPACING",
4050 "Missing a blank line after declarations\n" . $hereprev) &&
4052 fix_insert_line($fixlinenr, "\+");
4057 # check for spaces at the beginning of a line.
4059 # 1) within comments
4060 # 2) indented preprocessor commands
4062 if ($rawline =~ /^\+ / && $line !~ /^\+ *(?:$;|#|$Ident:)/) {
4063 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
4064 if (WARN("LEADING_SPACE",
4065 "please, no spaces at the start of a line\n" . $herevet) &&
4067 $fixed[$fixlinenr] =~ s/^\+([ \t]+)/"\+" . tabify($1)/e;
4071 # check we are in a valid C source file if not then ignore this hunk
4072 next if ($realfile !~ /\.(h|c)$/);
4074 # check for unusual line ending [ or (
4075 if ($line =~ /^\+.*([\[\(])\s*$/) {
4076 CHK("OPEN_ENDED_LINE",
4077 "Lines should not end with a '$1'\n" . $herecurr);
4080 # check if this appears to be the start function declaration, save the name
4081 if ($sline =~ /^\+\{\s*$/ &&
4082 $prevline =~ /^\+(?:(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*)?($Ident)\(/) {
4083 $context_function = $1;
4086 # check if this appears to be the end of function declaration
4087 if ($sline =~ /^\+\}\s*$/) {
4088 undef $context_function;
4091 # check indentation of any line with a bare else
4092 # (but not if it is a multiple line "if (foo) return bar; else return baz;")
4093 # if the previous line is a break or return and is indented 1 tab more...
4094 if ($sline =~ /^\+([\t]+)(?:}[ \t]*)?else(?:[ \t]*{)?\s*$/) {
4095 my $tabs = length($1) + 1;
4096 if ($prevline =~ /^\+\t{$tabs,$tabs}break\b/ ||
4097 ($prevline =~ /^\+\t{$tabs,$tabs}return\b/ &&
4098 defined $lines[$linenr] &&
4099 $lines[$linenr] !~ /^[ \+]\t{$tabs,$tabs}return/)) {
4100 WARN("UNNECESSARY_ELSE",
4101 "else is not generally useful after a break or return\n" . $hereprev);
4105 # check indentation of a line with a break;
4106 # if the previous line is a goto, return or break
4107 # and is indented the same # of tabs
4108 if ($sline =~ /^\+([\t]+)break\s*;\s*$/) {
4110 if ($prevline =~ /^\+$tabs(goto|return|break)\b/) {
4111 if (WARN("UNNECESSARY_BREAK",
4112 "break is not useful after a $1\n" . $hereprev) &&
4114 fix_delete_line($fixlinenr, $rawline);
4119 # check for RCS/CVS revision markers
4120 if ($rawline =~ /^\+.*\$(Revision|Log|Id)(?:\$|)/) {
4122 "CVS style keyword markers, these will _not_ be updated\n". $herecurr);
4125 # check for old HOTPLUG __dev<foo> section markings
4126 if ($line =~ /\b(__dev(init|exit)(data|const|))\b/) {
4127 WARN("HOTPLUG_SECTION",
4128 "Using $1 is unnecessary\n" . $herecurr);
4131 # Check for potential 'bare' types
4132 my ($stat, $cond, $line_nr_next, $remain_next, $off_next,
4134 #print "LINE<$line>\n";
4135 if ($linenr > $suppress_statement &&
4136 $realcnt && $sline =~ /.\s*\S/) {
4137 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
4138 ctx_statement_block($linenr, $realcnt, 0);
4139 $stat =~ s/\n./\n /g;
4140 $cond =~ s/\n./\n /g;
4142 #print "linenr<$linenr> <$stat>\n";
4143 # If this statement has no statement boundaries within
4144 # it there is no point in retrying a statement scan
4145 # until we hit end of it.
4146 my $frag = $stat; $frag =~ s/;+\s*$//;
4147 if ($frag !~ /(?:{|;)/) {
4148 #print "skip<$line_nr_next>\n";
4149 $suppress_statement = $line_nr_next;
4152 # Find the real next line.
4153 $realline_next = $line_nr_next;
4154 if (defined $realline_next &&
4155 (!defined $lines[$realline_next - 1] ||
4156 substr($lines[$realline_next - 1], $off_next) =~ /^\s*$/)) {
4163 # Ignore goto labels.
4164 if ($s =~ /$Ident:\*$/s) {
4166 # Ignore functions being called
4167 } elsif ($s =~ /^.\s*$Ident\s*\(/s) {
4169 } elsif ($s =~ /^.\s*else\b/s) {
4171 # declarations always start with types
4172 } elsif ($prev_values eq 'E' && $s =~ /^.\s*(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?((?:\s*$Ident)+?)\b(?:\s+$Sparse)?\s*\**\s*(?:$Ident|\(\*[^\)]*\))(?:\s*$Modifier)?\s*(?:;|=|,|\()/s) {
4175 possible($type, "A:" . $s);
4177 # definitions in global scope can only start with types
4178 } elsif ($s =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b\s*(?!:)/s) {
4179 possible($1, "B:" . $s);
4182 # any (foo ... *) is a pointer cast, and foo is a type
4183 while ($s =~ /\(($Ident)(?:\s+$Sparse)*[\s\*]+\s*\)/sg) {
4184 possible($1, "C:" . $s);
4187 # Check for any sort of function declaration.
4188 # int foo(something bar, other baz);
4189 # void (*store_gdt)(x86_descr_ptr *);
4190 if ($prev_values eq 'E' && $s =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/s) {
4191 my ($name_len) = length($1);
4194 substr($ctx, 0, $name_len + 1, '');
4195 $ctx =~ s/\)[^\)]*$//;
4197 for my $arg (split(/\s*,\s*/, $ctx)) {
4198 if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/s || $arg =~ /^($Ident)$/s) {
4200 possible($1, "D:" . $s);
4208 # Checks which may be anchored in the context.
4211 # Check for switch () and associated case and default
4212 # statements should be at the same indent.
4213 if ($line=~/\bswitch\s*\(.*\)/) {
4216 my @ctx = ctx_block_outer($linenr, $realcnt);
4218 for my $ctx (@ctx) {
4219 my ($clen, $cindent) = line_stats($ctx);
4220 if ($ctx =~ /^\+\s*(case\s+|default:)/ &&
4221 $indent != $cindent) {
4222 $err .= "$sep$ctx\n";
4229 ERROR("SWITCH_CASE_INDENT_LEVEL",
4230 "switch and case should be at the same indent\n$hereline$err");
4234 # if/while/etc brace do not go on next line, unless defining a do while loop,
4235 # or if that brace on the next line is for something else
4236 if ($line =~ /(.*)\b((?:if|while|for|switch|(?:[a-z_]+|)for_each[a-z_]+)\s*\(|do\b|else\b)/ && $line !~ /^.\s*\#/) {
4237 my $pre_ctx = "$1$2";
4239 my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0);
4241 if ($line =~ /^\+\t{6,}/) {
4242 WARN("DEEP_INDENTATION",
4243 "Too many leading tabs - consider code refactoring\n" . $herecurr);
4246 my $ctx_cnt = $realcnt - $#ctx - 1;
4247 my $ctx = join("\n", @ctx);
4249 my $ctx_ln = $linenr;
4250 my $ctx_skip = $realcnt;
4252 while ($ctx_skip > $ctx_cnt || ($ctx_skip == $ctx_cnt &&
4253 defined $lines[$ctx_ln - 1] &&
4254 $lines[$ctx_ln - 1] =~ /^-/)) {
4255 ##print "SKIP<$ctx_skip> CNT<$ctx_cnt>\n";
4256 $ctx_skip-- if (!defined $lines[$ctx_ln - 1] || $lines[$ctx_ln - 1] !~ /^-/);
4260 #print "realcnt<$realcnt> ctx_cnt<$ctx_cnt>\n";
4261 #print "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n";
4263 if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln - 1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
4265 "that open brace { should be on the previous line\n" .
4266 "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
4268 if ($level == 0 && $pre_ctx !~ /}\s*while\s*\($/ &&
4269 $ctx =~ /\)\s*\;\s*$/ &&
4270 defined $lines[$ctx_ln - 1])
4272 my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]);
4273 if ($nindent > $indent) {
4274 WARN("TRAILING_SEMICOLON",
4275 "trailing semicolon indicates no statements, indent implies otherwise\n" .
4276 "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
4281 # Check relative indent for conditionals and blocks.
4282 if ($line =~ /\b(?:(?:if|while|for|(?:[a-z_]+|)for_each[a-z_]+)\s*\(|(?:do|else)\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) {
4283 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
4284 ctx_statement_block($linenr, $realcnt, 0)
4285 if (!defined $stat);
4286 my ($s, $c) = ($stat, $cond);
4288 substr($s, 0, length($c), '');
4290 # remove inline comments
4294 # Find out how long the conditional actually is.
4295 my @newlines = ($c =~ /\n/gs);
4296 my $cond_lines = 1 + $#newlines;
4298 # Make sure we remove the line prefixes as we have
4299 # none on the first line, and are going to readd them
4302 while ($s =~ /\n\s+\\\n/) {
4303 $cond_lines += $s =~ s/\n\s+\\\n/\n/g;
4306 # We want to check the first line inside the block
4307 # starting at the end of the conditional, so remove:
4308 # 1) any blank line termination
4309 # 2) any opening brace { on end of the line
4311 my $continuation = 0;
4313 $s =~ s/^.*\bdo\b//;
4315 if ($s =~ s/^\s*\\//) {
4318 if ($s =~ s/^\s*?\n//) {
4323 # Also ignore a loop construct at the end of a
4324 # preprocessor statement.
4325 if (($prevline =~ /^.\s*#\s*define\s/ ||
4326 $prevline =~ /\\\s*$/) && $continuation == 0) {
4332 while ($cond_ptr != $cond_lines) {
4333 $cond_ptr = $cond_lines;
4335 # If we see an #else/#elif then the code
4337 if ($s =~ /^\s*\#\s*(?:else|elif)/) {
4342 # 1) blank lines, they should be at 0,
4343 # 2) preprocessor lines, and
4345 if ($continuation ||
4347 $s =~ /^\s*#\s*?/ ||
4348 $s =~ /^\s*$Ident\s*:/) {
4349 $continuation = ($s =~ /^.*?\\\n/) ? 1 : 0;
4350 if ($s =~ s/^.*?\n//) {
4356 my (undef, $sindent) = line_stats("+" . $s);
4357 my $stat_real = raw_line($linenr, $cond_lines);
4359 # Check if either of these lines are modified, else
4360 # this is not this patch's fault.
4361 if (!defined($stat_real) ||
4362 $stat !~ /^\+/ && $stat_real !~ /^\+/) {
4365 if (defined($stat_real) && $cond_lines > 1) {
4366 $stat_real = "[...]\n$stat_real";
4369 #print "line<$line> prevline<$prevline> indent<$indent> sindent<$sindent> check<$check> continuation<$continuation> s<$s> cond_lines<$cond_lines> stat_real<$stat_real> stat<$stat>\n";
4371 if ($check && $s ne '' &&
4372 (($sindent % $tabsize) != 0 ||
4373 ($sindent < $indent) ||
4374 ($sindent == $indent &&
4375 ($s !~ /^\s*(?:\}|\{|else\b)/)) ||
4376 ($sindent > $indent + $tabsize))) {
4377 WARN("SUSPECT_CODE_INDENT",
4378 "suspect code indent for conditional statements ($indent, $sindent)\n" . $herecurr . "$stat_real\n");
4382 # Track the 'values' across context and added lines.
4383 my $opline = $line; $opline =~ s/^./ /;
4384 my ($curr_values, $curr_vars) =
4385 annotate_values($opline . "\n", $prev_values);
4386 $curr_values = $prev_values . $curr_values;
4388 my $outline = $opline; $outline =~ s/\t/ /g;
4389 print "$linenr > .$outline\n";
4390 print "$linenr > $curr_values\n";
4391 print "$linenr > $curr_vars\n";
4393 $prev_values = substr($curr_values, -1);
4395 #ignore lines not being added
4396 next if ($line =~ /^[^\+]/);
4398 # check for self assignments used to avoid compiler warnings
4399 # e.g.: int foo = foo, *bar = NULL;
4400 # struct foo bar = *(&(bar));
4401 if ($line =~ /^\+\s*(?:$Declare)?([A-Za-z_][A-Za-z\d_]*)\s*=/) {
4403 if ($line =~ /^\+\s*(?:$Declare)?$var\s*=\s*(?:$var|\*\s*\(?\s*&\s*\(?\s*$var\s*\)?\s*\)?)\s*[;,]/) {
4404 WARN("SELF_ASSIGNMENT",
4405 "Do not use self-assignments to avoid compiler warnings\n" . $herecurr);
4409 # check for dereferences that span multiple lines
4410 if ($prevline =~ /^\+.*$Lval\s*(?:\.|->)\s*$/ &&
4411 $line =~ /^\+\s*(?!\#\s*(?!define\s+|if))\s*$Lval/) {
4412 $prevline =~ /($Lval\s*(?:\.|->))\s*$/;
4414 $line =~ /^.\s*($Lval)/;
4417 WARN("MULTILINE_DEREFERENCE",
4418 "Avoid multiple line dereference - prefer '$ref'\n" . $hereprev);
4421 # check for declarations of signed or unsigned without int
4422 while ($line =~ m{\b($Declare)\s*(?!char\b|short\b|int\b|long\b)\s*($Ident)?\s*[=,;\[\)\(]}g) {
4425 $var = "" if (!defined $var);
4426 if ($type =~ /^(?:(?:$Storage|$Inline|$Attribute)\s+)*((?:un)?signed)((?:\s*\*)*)\s*$/) {
4430 $pointer = "" if (!defined $pointer);
4432 if (WARN("UNSPECIFIED_INT",
4433 "Prefer '" . trim($sign) . " int" . rtrim($pointer) . "' to bare use of '$sign" . rtrim($pointer) . "'\n" . $herecurr) &&
4435 my $decl = trim($sign) . " int ";
4436 my $comp_pointer = $pointer;
4437 $comp_pointer =~ s/\s//g;
4438 $decl .= $comp_pointer;
4439 $decl = rtrim($decl) if ($var eq "");
4440 $fixed[$fixlinenr] =~ s@\b$sign\s*\Q$pointer\E\s*$var\b@$decl$var@;
4445 # TEST: allow direct testing of the type matcher.
4447 if ($line =~ /^.\s*$Declare\s*$/) {
4449 "TEST: is type\n" . $herecurr);
4450 } elsif ($dbg_type > 1 && $line =~ /^.+($Declare)/) {
4451 ERROR("TEST_NOT_TYPE",
4452 "TEST: is not type ($1 is)\n". $herecurr);
4456 # TEST: allow direct testing of the attribute matcher.
4458 if ($line =~ /^.\s*$Modifier\s*$/) {
4460 "TEST: is attr\n" . $herecurr);
4461 } elsif ($dbg_attr > 1 && $line =~ /^.+($Modifier)/) {
4462 ERROR("TEST_NOT_ATTR",
4463 "TEST: is not attr ($1 is)\n". $herecurr);
4468 # check for initialisation to aggregates open brace on the next line
4469 if ($line =~ /^.\s*{/ &&
4470 $prevline =~ /(?:^|[^=])=\s*$/) {
4471 if (ERROR("OPEN_BRACE",
4472 "that open brace { should be on the previous line\n" . $hereprev) &&
4473 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
4474 fix_delete_line($fixlinenr - 1, $prevrawline);
4475 fix_delete_line($fixlinenr, $rawline);
4476 my $fixedline = $prevrawline;
4477 $fixedline =~ s/\s*=\s*$/ = {/;
4478 fix_insert_line($fixlinenr, $fixedline);
4480 $fixedline =~ s/^(.\s*)\{\s*/$1/;
4481 fix_insert_line($fixlinenr, $fixedline);
4486 # Checks which are anchored on the added line.
4489 # check for malformed paths in #include statements (uses RAW line)
4490 if ($rawline =~ m{^.\s*\#\s*include\s+[<"](.*)[">]}) {
4492 if ($path =~ m{//}) {
4493 ERROR("MALFORMED_INCLUDE",
4494 "malformed #include filename\n" . $herecurr);
4496 if ($path =~ "^uapi/" && $realfile =~ m@\binclude/uapi/@) {
4497 ERROR("UAPI_INCLUDE",
4498 "No #include in ...include/uapi/... should use a uapi/ path prefix\n" . $herecurr);
4502 # no C99 // comments
4503 if ($line =~ m{//}) {
4504 if (ERROR("C99_COMMENTS",
4505 "do not use C99 // comments\n" . $herecurr) &&
4507 my $line = $fixed[$fixlinenr];
4508 if ($line =~ /\/\/(.*)$/) {
4509 my $comment = trim($1);
4510 $fixed[$fixlinenr] =~ s@\/\/(.*)$@/\* $comment \*/@;
4514 # Remove C99 comments.
4516 $opline =~ s@//.*@@;
4518 # EXPORT_SYMBOL should immediately follow the thing it is exporting, consider
4519 # the whole statement.
4520 #print "APW <$lines[$realline_next - 1]>\n";
4521 if (defined $realline_next &&
4522 exists $lines[$realline_next - 1] &&
4523 !defined $suppress_export{$realline_next} &&
4524 ($lines[$realline_next - 1] =~ /EXPORT_SYMBOL.*\((.*)\)/)) {
4525 # Handle definitions which produce identifiers with
4528 # EXPORT_SYMBOL(something_foo);
4530 $name =~ s/^\s*($Ident).*/$1/;
4531 if ($stat =~ /^(?:.\s*}\s*\n)?.([A-Z_]+)\s*\(\s*($Ident)/ &&
4532 $name =~ /^${Ident}_$2/) {
4533 #print "FOO C name<$name>\n";
4534 $suppress_export{$realline_next} = 1;
4536 } elsif ($stat !~ /(?:
4538 ^.DEFINE_$Ident\(\Q$name\E\)|
4539 ^.DECLARE_$Ident\(\Q$name\E\)|
4540 ^.LIST_HEAD\(\Q$name\E\)|
4541 ^.(?:$Storage\s+)?$Type\s*\(\s*\*\s*\Q$name\E\s*\)\s*\(|
4542 \b\Q$name\E(?:\s+$Attribute)*\s*(?:;|=|\[|\()
4544 #print "FOO A<$lines[$realline_next - 1]> stat<$stat> name<$name>\n";
4545 $suppress_export{$realline_next} = 2;
4547 $suppress_export{$realline_next} = 1;
4550 if (!defined $suppress_export{$linenr} &&
4551 $prevline =~ /^.\s*$/ &&
4552 ($line =~ /EXPORT_SYMBOL.*\((.*)\)/)) {
4553 #print "FOO B <$lines[$linenr - 1]>\n";
4554 $suppress_export{$linenr} = 2;
4556 if (defined $suppress_export{$linenr} &&
4557 $suppress_export{$linenr} == 2) {
4558 WARN("EXPORT_SYMBOL",
4559 "EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
4562 # check for global initialisers.
4563 if ($line =~ /^\+$Type\s*$Ident(?:\s+$Modifier)*\s*=\s*($zero_initializer)\s*;/ &&
4564 !exclude_global_initialisers($realfile)) {
4565 if (ERROR("GLOBAL_INITIALISERS",
4566 "do not initialise globals to $1\n" . $herecurr) &&
4568 $fixed[$fixlinenr] =~ s/(^.$Type\s*$Ident(?:\s+$Modifier)*)\s*=\s*$zero_initializer\s*;/$1;/;
4571 # check for static initialisers.
4572 if ($line =~ /^\+.*\bstatic\s.*=\s*($zero_initializer)\s*;/) {
4573 if (ERROR("INITIALISED_STATIC",
4574 "do not initialise statics to $1\n" .
4577 $fixed[$fixlinenr] =~ s/(\bstatic\s.*?)\s*=\s*$zero_initializer\s*;/$1;/;
4581 # check for misordered declarations of char/short/int/long with signed/unsigned
4582 while ($sline =~ m{(\b$TypeMisordered\b)}g) {
4584 WARN("MISORDERED_TYPE",
4585 "type '$tmp' should be specified in [[un]signed] [short|int|long|long long] order\n" . $herecurr);
4588 # check for unnecessary <signed> int declarations of short/long/long long
4589 while ($sline =~ m{\b($TypeMisordered(\s*\*)*|$C90_int_types)\b}g) {
4590 my $type = trim($1);
4591 next if ($type !~ /\bint\b/);
4592 next if ($type !~ /\b(?:short|long\s+long|long)\b/);
4593 my $new_type = $type;
4594 $new_type =~ s/\b\s*int\s*\b/ /;
4595 $new_type =~ s/\b\s*(?:un)?signed\b\s*/ /;
4596 $new_type =~ s/^const\s+//;
4597 $new_type = "unsigned $new_type" if ($type =~ /\bunsigned\b/);
4598 $new_type = "const $new_type" if ($type =~ /^const\b/);
4599 $new_type =~ s/\s+/ /g;
4600 $new_type = trim($new_type);
4601 if (WARN("UNNECESSARY_INT",
4602 "Prefer '$new_type' over '$type' as the int is unnecessary\n" . $herecurr) &&
4604 $fixed[$fixlinenr] =~ s/\b\Q$type\E\b/$new_type/;
4608 # check for static const char * arrays.
4609 if ($line =~ /\bstatic\s+const\s+char\s*\*\s*(\w+)\s*\[\s*\]\s*=\s*/) {
4610 WARN("STATIC_CONST_CHAR_ARRAY",
4611 "static const char * array should probably be static const char * const\n" .
4615 # check for initialized const char arrays that should be static const
4616 if ($line =~ /^\+\s*const\s+(char|unsigned\s+char|_*u8|(?:[us]_)?int8_t)\s+\w+\s*\[\s*(?:\w+\s*)?\]\s*=\s*"/) {
4617 if (WARN("STATIC_CONST_CHAR_ARRAY",
4618 "const array should probably be static const\n" . $herecurr) &&
4620 $fixed[$fixlinenr] =~ s/(^.\s*)const\b/${1}static const/;
4624 # check for static char foo[] = "bar" declarations.
4625 if ($line =~ /\bstatic\s+char\s+(\w+)\s*\[\s*\]\s*=\s*"/) {
4626 WARN("STATIC_CONST_CHAR_ARRAY",
4627 "static char array declaration should probably be static const char\n" .
4631 # check for const <foo> const where <foo> is not a pointer or array type
4632 if ($sline =~ /\bconst\s+($BasicType)\s+const\b/) {
4634 if ($sline =~ /\bconst\s+\Q$found\E\s+const\b\s*\*/) {
4636 "'const $found const *' should probably be 'const $found * const'\n" . $herecurr);
4637 } elsif ($sline !~ /\bconst\s+\Q$found\E\s+const\s+\w+\s*\[/) {
4639 "'const $found const' should probably be 'const $found'\n" . $herecurr);
4643 # check for const static or static <non ptr type> const declarations
4644 # prefer 'static const <foo>' over 'const static <foo>' and 'static <foo> const'
4645 if ($sline =~ /^\+\s*const\s+static\s+($Type)\b/ ||
4646 $sline =~ /^\+\s*static\s+($BasicType)\s+const\b/) {
4647 if (WARN("STATIC_CONST",
4648 "Move const after static - use 'static const $1'\n" . $herecurr) &&
4650 $fixed[$fixlinenr] =~ s/\bconst\s+static\b/static const/;
4651 $fixed[$fixlinenr] =~ s/\bstatic\s+($BasicType)\s+const\b/static const $1/;
4655 # check for non-global char *foo[] = {"bar", ...} declarations.
4656 if ($line =~ /^.\s+(?:static\s+|const\s+)?char\s+\*\s*\w+\s*\[\s*\]\s*=\s*\{/) {
4657 WARN("STATIC_CONST_CHAR_ARRAY",
4658 "char * array declaration might be better as static const\n" .
4662 # check for sizeof(foo)/sizeof(foo[0]) that could be ARRAY_SIZE(foo)
4663 if ($line =~ m@\bsizeof\s*\(\s*($Lval)\s*\)@) {
4665 if ($line =~ m@\b(sizeof\s*\(\s*\Q$array\E\s*\)\s*/\s*sizeof\s*\(\s*\Q$array\E\s*\[\s*0\s*\]\s*\))@) {
4667 if (WARN("ARRAY_SIZE",
4668 "Prefer ARRAY_SIZE($array)\n" . $herecurr) &&
4670 $fixed[$fixlinenr] =~ s/\Q$array_div\E/ARRAY_SIZE($array)/;
4675 # check for function declarations without arguments like "int foo()"
4676 if ($line =~ /(\b$Type\s*$Ident)\s*\(\s*\)/) {
4677 if (ERROR("FUNCTION_WITHOUT_ARGS",
4678 "Bad function definition - $1() should probably be $1(void)\n" . $herecurr) &&
4680 $fixed[$fixlinenr] =~ s/(\b($Type)\s+($Ident))\s*\(\s*\)/$2 $3(void)/;
4684 # check for new typedefs, only function parameters and sparse annotations
4686 if ($line =~ /\btypedef\s/ &&
4687 $line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ &&
4688 $line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ &&
4689 $line !~ /\b$typeTypedefs\b/ &&
4690 $line !~ /\b__bitwise\b/) {
4691 WARN("NEW_TYPEDEFS",
4692 "do not add new typedefs\n" . $herecurr);
4695 # * goes on variable not on type
4697 while ($line =~ m{(\($NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)\))}g) {
4699 my ($ident, $from, $to) = ($1, $2, $2);
4701 # Should start with a space.
4702 $to =~ s/^(\S)/ $1/;
4703 # Should not end with a space.
4705 # '*'s should not have spaces between.
4706 while ($to =~ s/\*\s+\*/\*\*/) {
4709 ## print "1: from<$from> to<$to> ident<$ident>\n";
4711 if (ERROR("POINTER_LOCATION",
4712 "\"(foo$from)\" should be \"(foo$to)\"\n" . $herecurr) &&
4714 my $sub_from = $ident;
4715 my $sub_to = $ident;
4716 $sub_to =~ s/\Q$from\E/$to/;
4717 $fixed[$fixlinenr] =~
4718 s@\Q$sub_from\E@$sub_to@;
4722 while ($line =~ m{(\b$NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)($Ident))}g) {
4724 my ($match, $from, $to, $ident) = ($1, $2, $2, $3);
4726 # Should start with a space.
4727 $to =~ s/^(\S)/ $1/;
4728 # Should not end with a space.
4730 # '*'s should not have spaces between.
4731 while ($to =~ s/\*\s+\*/\*\*/) {
4733 # Modifiers should have spaces.
4734 $to =~ s/(\b$Modifier$)/$1 /;
4736 ## print "2: from<$from> to<$to> ident<$ident>\n";
4737 if ($from ne $to && $ident !~ /^$Modifier$/) {
4738 if (ERROR("POINTER_LOCATION",
4739 "\"foo${from}bar\" should be \"foo${to}bar\"\n" . $herecurr) &&
4742 my $sub_from = $match;
4743 my $sub_to = $match;
4744 $sub_to =~ s/\Q$from\E/$to/;
4745 $fixed[$fixlinenr] =~
4746 s@\Q$sub_from\E@$sub_to@;
4751 # avoid BUG() or BUG_ON()
4752 if ($line =~ /\b(?:BUG|BUG_ON)\b/) {
4753 my $msg_level = \&WARN;
4754 $msg_level = \&CHK if ($file);
4755 &{$msg_level}("AVOID_BUG",
4756 "Avoid crashing the kernel - try using WARN_ON & recovery code rather than BUG() or BUG_ON()\n" . $herecurr);
4759 # avoid LINUX_VERSION_CODE
4760 if ($line =~ /\bLINUX_VERSION_CODE\b/) {
4761 WARN("LINUX_VERSION_CODE",
4762 "LINUX_VERSION_CODE should be avoided, code should be for the version to which it is merged\n" . $herecurr);
4765 # check for uses of printk_ratelimit
4766 if ($line =~ /\bprintk_ratelimit\s*\(/) {
4767 WARN("PRINTK_RATELIMITED",
4768 "Prefer printk_ratelimited or pr_<level>_ratelimited to printk_ratelimit\n" . $herecurr);
4771 # printk should use KERN_* levels
4772 if ($line =~ /\bprintk\s*\(\s*(?!KERN_[A-Z]+\b)/) {
4773 WARN("PRINTK_WITHOUT_KERN_LEVEL",
4774 "printk() should include KERN_<LEVEL> facility level\n" . $herecurr);
4777 # prefer variants of (subsystem|netdev|dev|pr)_<level> to printk(KERN_<LEVEL>
4778 if ($line =~ /\b(printk(_once|_ratelimited)?)\s*\(\s*KERN_([A-Z]+)/) {
4782 $modifier = "" if (!defined($modifier));
4783 my $level = lc($orig);
4784 $level = "warn" if ($level eq "warning");
4785 my $level2 = $level;
4786 $level2 = "dbg" if ($level eq "debug");
4787 $level .= $modifier;
4788 $level2 .= $modifier;
4789 WARN("PREFER_PR_LEVEL",
4790 "Prefer [subsystem eg: netdev]_$level2([subsystem]dev, ... then dev_$level2(dev, ... then pr_$level(... to $printk(KERN_$orig ...\n" . $herecurr);
4793 # prefer dev_<level> to dev_printk(KERN_<LEVEL>
4794 if ($line =~ /\bdev_printk\s*\(\s*KERN_([A-Z]+)/) {
4796 my $level = lc($orig);
4797 $level = "warn" if ($level eq "warning");
4798 $level = "dbg" if ($level eq "debug");
4799 WARN("PREFER_DEV_LEVEL",
4800 "Prefer dev_$level(... to dev_printk(KERN_$orig, ...\n" . $herecurr);
4803 # trace_printk should not be used in production code.
4804 if ($line =~ /\b(trace_printk|trace_puts|ftrace_vprintk)\s*\(/) {
4805 WARN("TRACE_PRINTK",
4806 "Do not use $1() in production code (this can be ignored if built only with a debug config option)\n" . $herecurr);
4809 # ENOSYS means "bad syscall nr" and nothing else. This will have a small
4810 # number of false positives, but assembly files are not checked, so at
4811 # least the arch entry code will not trigger this warning.
4812 if ($line =~ /\bENOSYS\b/) {
4814 "ENOSYS means 'invalid syscall nr' and nothing else\n" . $herecurr);
4817 # ENOTSUPP is not a standard error code and should be avoided in new patches.
4818 # Folks usually mean EOPNOTSUPP (also called ENOTSUP), when they type ENOTSUPP.
4819 # Similarly to ENOSYS warning a small number of false positives is expected.
4820 if (!$file && $line =~ /\bENOTSUPP\b/) {
4821 if (WARN("ENOTSUPP",
4822 "ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP\n" . $herecurr) &&
4824 $fixed[$fixlinenr] =~ s/\bENOTSUPP\b/EOPNOTSUPP/;
4828 # function brace can't be on same line, except for #defines of do while,
4829 # or if closed on same line
4830 if ($perl_version_ok &&
4831 $sline =~ /$Type\s*$Ident\s*$balanced_parens\s*\{/ &&
4832 $sline !~ /\#\s*define\b.*do\s*\{/ &&
4834 if (ERROR("OPEN_BRACE",
4835 "open brace '{' following function definitions go on the next line\n" . $herecurr) &&
4837 fix_delete_line($fixlinenr, $rawline);
4838 my $fixed_line = $rawline;
4839 $fixed_line =~ /(^..*$Type\s*$Ident\(.*\)\s*)\{(.*)$/;
4842 fix_insert_line($fixlinenr, ltrim($line1));
4843 fix_insert_line($fixlinenr, "\+{");
4844 if ($line2 !~ /^\s*$/) {
4845 fix_insert_line($fixlinenr, "\+\t" . trim($line2));
4850 # open braces for enum, union and struct go on the same line.
4851 if ($line =~ /^.\s*{/ &&
4852 $prevline =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?\s*$/) {
4853 if (ERROR("OPEN_BRACE",
4854 "open brace '{' following $1 go on the same line\n" . $hereprev) &&
4855 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
4856 fix_delete_line($fixlinenr - 1, $prevrawline);
4857 fix_delete_line($fixlinenr, $rawline);
4858 my $fixedline = rtrim($prevrawline) . " {";
4859 fix_insert_line($fixlinenr, $fixedline);
4860 $fixedline = $rawline;
4861 $fixedline =~ s/^(.\s*)\{\s*/$1\t/;
4862 if ($fixedline !~ /^\+\s*$/) {
4863 fix_insert_line($fixlinenr, $fixedline);
4868 # missing space after union, struct or enum definition
4869 if ($line =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident){1,2}[=\{]/) {
4871 "missing space after $1 definition\n" . $herecurr) &&
4873 $fixed[$fixlinenr] =~
4874 s/^(.\s*(?:typedef\s+)?(?:enum|union|struct)(?:\s+$Ident){1,2})([=\{])/$1 $2/;
4878 # Function pointer declarations
4879 # check spacing between type, funcptr, and args
4880 # canonical declaration is "type (*funcptr)(args...)"
4881 if ($line =~ /^.\s*($Declare)\((\s*)\*(\s*)($Ident)(\s*)\)(\s*)\(/) {
4883 my $pre_pointer_space = $2;
4884 my $post_pointer_space = $3;
4886 my $post_funcname_space = $5;
4887 my $pre_args_space = $6;
4889 # the $Declare variable will capture all spaces after the type
4890 # so check it for a missing trailing missing space but pointer return types
4891 # don't need a space so don't warn for those.
4892 my $post_declare_space = "";
4893 if ($declare =~ /(\s+)$/) {
4894 $post_declare_space = $1;
4895 $declare = rtrim($declare);
4897 if ($declare !~ /\*$/ && $post_declare_space =~ /^$/) {
4899 "missing space after return type\n" . $herecurr);
4900 $post_declare_space = " ";
4903 # unnecessary space "type (*funcptr)(args...)"
4904 # This test is not currently implemented because these declarations are
4906 # int foo(int bar, ...)
4907 # and this is form shouldn't/doesn't generate a checkpatch warning.
4909 # elsif ($declare =~ /\s{2,}$/) {
4911 # "Multiple spaces after return type\n" . $herecurr);
4914 # unnecessary space "type ( *funcptr)(args...)"
4915 if (defined $pre_pointer_space &&
4916 $pre_pointer_space =~ /^\s/) {
4918 "Unnecessary space after function pointer open parenthesis\n" . $herecurr);
4921 # unnecessary space "type (* funcptr)(args...)"
4922 if (defined $post_pointer_space &&
4923 $post_pointer_space =~ /^\s/) {
4925 "Unnecessary space before function pointer name\n" . $herecurr);
4928 # unnecessary space "type (*funcptr )(args...)"
4929 if (defined $post_funcname_space &&
4930 $post_funcname_space =~ /^\s/) {
4932 "Unnecessary space after function pointer name\n" . $herecurr);
4935 # unnecessary space "type (*funcptr) (args...)"
4936 if (defined $pre_args_space &&
4937 $pre_args_space =~ /^\s/) {
4939 "Unnecessary space before function pointer arguments\n" . $herecurr);
4942 if (show_type("SPACING") && $fix) {
4943 $fixed[$fixlinenr] =~
4944 s/^(.\s*)$Declare\s*\(\s*\*\s*$Ident\s*\)\s*\(/$1 . $declare . $post_declare_space . '(*' . $funcname . ')('/ex;
4948 # check for spacing round square brackets; allowed:
4949 # 1. with a type on the left -- int [] a;
4950 # 2. at the beginning of a line for slice initialisers -- [0...10] = 5,
4951 # 3. inside a curly brace -- = { [0...10] = 5 }
4952 while ($line =~ /(.*?\s)\[/g) {
4953 my ($where, $prefix) = ($-[1], $1);
4954 if ($prefix !~ /$Type\s+$/ &&
4955 ($where != 0 || $prefix !~ /^.\s+$/) &&
4956 $prefix !~ /[{,:]\s+$/) {
4957 if (ERROR("BRACKET_SPACE",
4958 "space prohibited before open square bracket '['\n" . $herecurr) &&
4960 $fixed[$fixlinenr] =~
4961 s/^(\+.*?)\s+\[/$1\[/;
4966 # check for spaces between functions and their parentheses.
4967 while ($line =~ /($Ident)\s+\(/g) {
4969 my $ctx_before = substr($line, 0, $-[1]);
4970 my $ctx = "$ctx_before$name";
4972 # Ignore those directives where spaces _are_ permitted.
4974 if|for|while|switch|return|case|
4975 volatile|__volatile__|
4976 __attribute__|format|__extension__|
4979 # cpp #define statements have non-optional spaces, ie
4980 # if there is a space between the name and the open
4981 # parenthesis it is simply not a parameter group.
4982 } elsif ($ctx_before =~ /^.\s*\#\s*define\s*$/) {
4984 # cpp #elif statement condition may start with a (
4985 } elsif ($ctx =~ /^.\s*\#\s*elif\s*$/) {
4987 # If this whole things ends with a type its most
4988 # likely a typedef for a function.
4989 } elsif ($ctx =~ /$Type$/) {
4993 "space prohibited between function name and open parenthesis '('\n" . $herecurr) &&
4995 $fixed[$fixlinenr] =~
4996 s/\b$name\s+\(/$name\(/;
5001 # Check operator spacing.
5002 if (!($line=~/\#\s*include/)) {
5003 my $fixed_line = "";
5007 <<=|>>=|<=|>=|==|!=|
5008 \+=|-=|\*=|\/=|%=|\^=|\|=|&=|
5009 =>|->|<<|>>|<|>|=|!|~|
5010 &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%|
5013 my @elements = split(/($ops|;)/, $opline);
5015 ## print("element count: <" . $#elements . ">\n");
5016 ## foreach my $el (@elements) {
5017 ## print("el: <$el>\n");
5020 my @fix_elements = ();
5023 foreach my $el (@elements) {
5024 push(@fix_elements, substr($rawline, $off, length($el)));
5025 $off += length($el);
5030 my $blank = copy_spacing($opline);
5031 my $last_after = -1;
5033 for (my $n = 0; $n < $#elements; $n += 2) {
5035 my $good = $fix_elements[$n] . $fix_elements[$n + 1];
5037 ## print("n: <$n> good: <$good>\n");
5039 $off += length($elements[$n]);
5041 # Pick up the preceding and succeeding characters.
5042 my $ca = substr($opline, 0, $off);
5044 if (length($opline) >= ($off + length($elements[$n + 1]))) {
5045 $cc = substr($opline, $off + length($elements[$n + 1]));
5047 my $cb = "$ca$;$cc";
5050 $a = 'V' if ($elements[$n] ne '');
5051 $a = 'W' if ($elements[$n] =~ /\s$/);
5052 $a = 'C' if ($elements[$n] =~ /$;$/);
5053 $a = 'B' if ($elements[$n] =~ /(\[|\()$/);
5054 $a = 'O' if ($elements[$n] eq '');
5055 $a = 'E' if ($ca =~ /^\s*$/);
5057 my $op = $elements[$n + 1];
5060 if (defined $elements[$n + 2]) {
5061 $c = 'V' if ($elements[$n + 2] ne '');
5062 $c = 'W' if ($elements[$n + 2] =~ /^\s/);
5063 $c = 'C' if ($elements[$n + 2] =~ /^$;/);
5064 $c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
5065 $c = 'O' if ($elements[$n + 2] eq '');
5066 $c = 'E' if ($elements[$n + 2] =~ /^\s*\\$/);
5071 my $ctx = "${a}x${c}";
5073 my $at = "(ctx:$ctx)";
5075 my $ptr = substr($blank, 0, $off) . "^";
5076 my $hereptr = "$hereline$ptr\n";
5078 # Pull out the value of this operator.
5079 my $op_type = substr($curr_values, $off + 1, 1);
5081 # Get the full operator variant.
5082 my $opv = $op . substr($curr_vars, $off, 1);
5084 # Ignore operators passed as parameters.
5085 if ($op_type ne 'V' &&
5086 $ca =~ /\s$/ && $cc =~ /^\s*[,\)]/) {
5089 # } elsif ($op =~ /^$;+$/) {
5091 # ; should have either the end of line or a space or \ after it
5092 } elsif ($op eq ';') {
5093 if ($ctx !~ /.x[WEBC]/ &&
5094 $cc !~ /^\\/ && $cc !~ /^;/) {
5095 if (ERROR("SPACING",
5096 "space required after that '$op' $at\n" . $hereptr)) {
5097 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]) . " ";
5103 } elsif ($op eq '//') {
5105 # : when part of a bitfield
5106 } elsif ($opv eq ':B') {
5107 # skip the bitfield test for now
5111 } elsif ($op eq '->') {
5112 if ($ctx =~ /Wx.|.xW/) {
5113 if (ERROR("SPACING",
5114 "spaces prohibited around that '$op' $at\n" . $hereptr)) {
5115 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
5116 if (defined $fix_elements[$n + 2]) {
5117 $fix_elements[$n + 2] =~ s/^\s+//;
5123 # , must not have a space before and must have a space on the right.
5124 } elsif ($op eq ',') {
5125 my $rtrim_before = 0;
5126 my $space_after = 0;
5127 if ($ctx =~ /Wx./) {
5128 if (ERROR("SPACING",
5129 "space prohibited before that '$op' $at\n" . $hereptr)) {
5134 if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) {
5135 if (ERROR("SPACING",
5136 "space required after that '$op' $at\n" . $hereptr)) {
5142 if ($rtrim_before || $space_after) {
5143 if ($rtrim_before) {
5144 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
5146 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]);
5153 # '*' as part of a type definition -- reported already.
5154 } elsif ($opv eq '*_') {
5155 #warn "'*' is part of type\n";
5157 # unary operators should have a space before and
5158 # none after. May be left adjacent to another
5159 # unary operator, or a cast
5160 } elsif ($op eq '!' || $op eq '~' ||
5161 $opv eq '*U' || $opv eq '-U' ||
5162 $opv eq '&U' || $opv eq '&&U') {
5163 if ($ctx !~ /[WEBC]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
5164 if (ERROR("SPACING",
5165 "space required before that '$op' $at\n" . $hereptr)) {
5166 if ($n != $last_after + 2) {
5167 $good = $fix_elements[$n] . " " . ltrim($fix_elements[$n + 1]);
5172 if ($op eq '*' && $cc =~/\s*$Modifier\b/) {
5173 # A unary '*' may be const
5175 } elsif ($ctx =~ /.xW/) {
5176 if (ERROR("SPACING",
5177 "space prohibited after that '$op' $at\n" . $hereptr)) {
5178 $good = $fix_elements[$n] . rtrim($fix_elements[$n + 1]);
5179 if (defined $fix_elements[$n + 2]) {
5180 $fix_elements[$n + 2] =~ s/^\s+//;
5186 # unary ++ and unary -- are allowed no space on one side.
5187 } elsif ($op eq '++' or $op eq '--') {
5188 if ($ctx !~ /[WEOBC]x[^W]/ && $ctx !~ /[^W]x[WOBEC]/) {
5189 if (ERROR("SPACING",
5190 "space required one side of that '$op' $at\n" . $hereptr)) {
5191 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]) . " ";
5195 if ($ctx =~ /Wx[BE]/ ||
5196 ($ctx =~ /Wx./ && $cc =~ /^;/)) {
5197 if (ERROR("SPACING",
5198 "space prohibited before that '$op' $at\n" . $hereptr)) {
5199 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
5203 if ($ctx =~ /ExW/) {
5204 if (ERROR("SPACING",
5205 "space prohibited after that '$op' $at\n" . $hereptr)) {
5206 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]);
5207 if (defined $fix_elements[$n + 2]) {
5208 $fix_elements[$n + 2] =~ s/^\s+//;
5214 # << and >> may either have or not have spaces both sides
5215 } elsif ($op eq '<<' or $op eq '>>' or
5216 $op eq '&' or $op eq '^' or $op eq '|' or
5217 $op eq '+' or $op eq '-' or
5218 $op eq '*' or $op eq '/' or
5222 if (defined $fix_elements[$n + 2] && $ctx !~ /[EW]x[EW]/) {
5224 "spaces preferred around that '$op' $at\n" . $hereptr)) {
5225 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
5226 $fix_elements[$n + 2] =~ s/^\s+//;
5229 } elsif (!defined $fix_elements[$n + 2] && $ctx !~ /Wx[OE]/) {
5231 "space preferred before that '$op' $at\n" . $hereptr)) {
5232 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]);
5236 } elsif ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
5237 if (ERROR("SPACING",
5238 "need consistent spacing around '$op' $at\n" . $hereptr)) {
5239 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
5240 if (defined $fix_elements[$n + 2]) {
5241 $fix_elements[$n + 2] =~ s/^\s+//;
5247 # A colon needs no spaces before when it is
5248 # terminating a case value or a label.
5249 } elsif ($opv eq ':C' || $opv eq ':L') {
5250 if ($ctx =~ /Wx./ and $realfile !~ m@.*\.lds\.h$@) {
5251 if (ERROR("SPACING",
5252 "space prohibited before that '$op' $at\n" . $hereptr)) {
5253 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
5258 # All the others need spaces both sides.
5259 } elsif ($ctx !~ /[EWC]x[CWE]/) {
5262 # Ignore email addresses <foo@bar>
5264 $cc =~ /^\S+\@\S+>/) ||
5266 $ca =~ /<\S+\@\S+$/))
5271 # for asm volatile statements
5272 # ignore a colon with another
5273 # colon immediately before or after
5275 ($ca =~ /:$/ || $cc =~ /^:/)) {
5279 # messages are ERROR, but ?: are CHK
5281 my $msg_level = \&ERROR;
5282 $msg_level = \&CHK if (($op eq '?:' || $op eq '?' || $op eq ':') && $ctx =~ /VxV/);
5284 if (&{$msg_level}("SPACING",
5285 "spaces required around that '$op' $at\n" . $hereptr)) {
5286 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
5287 if (defined $fix_elements[$n + 2]) {
5288 $fix_elements[$n + 2] =~ s/^\s+//;
5294 $off += length($elements[$n + 1]);
5296 ## print("n: <$n> GOOD: <$good>\n");
5298 $fixed_line = $fixed_line . $good;
5301 if (($#elements % 2) == 0) {
5302 $fixed_line = $fixed_line . $fix_elements[$#elements];
5305 if ($fix && $line_fixed && $fixed_line ne $fixed[$fixlinenr]) {
5306 $fixed[$fixlinenr] = $fixed_line;
5312 # check for whitespace before a non-naked semicolon
5313 if ($line =~ /^\+.*\S\s+;\s*$/) {
5315 "space prohibited before semicolon\n" . $herecurr) &&
5317 1 while $fixed[$fixlinenr] =~
5318 s/^(\+.*\S)\s+;/$1;/;
5322 # check for multiple assignments
5323 if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
5324 CHK("MULTIPLE_ASSIGNMENTS",
5325 "multiple assignments should be avoided\n" . $herecurr);
5328 ## # check for multiple declarations, allowing for a function declaration
5330 ## if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ &&
5331 ## $line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) {
5333 ## # Remove any bracketed sections to ensure we do not
5334 ## # falsely report the parameters of functions.
5336 ## while ($ln =~ s/\([^\(\)]*\)//g) {
5338 ## if ($ln =~ /,/) {
5339 ## WARN("MULTIPLE_DECLARATION",
5340 ## "declaring multiple variables together should be avoided\n" . $herecurr);
5344 #need space before brace following if, while, etc
5345 if (($line =~ /\(.*\)\{/ && $line !~ /\($Type\)\{/) ||
5346 $line =~ /\b(?:else|do)\{/) {
5347 if (ERROR("SPACING",
5348 "space required before the open brace '{'\n" . $herecurr) &&
5350 $fixed[$fixlinenr] =~ s/^(\+.*(?:do|else|\)))\{/$1 {/;
5354 ## # check for blank lines before declarations
5355 ## if ($line =~ /^.\t+$Type\s+$Ident(?:\s*=.*)?;/ &&
5356 ## $prevrawline =~ /^.\s*$/) {
5358 ## "No blank lines before declarations\n" . $hereprev);
5362 # closing brace should have a space following it when it has anything
5364 if ($line =~ /}(?!(?:,|;|\)|\}))\S/) {
5365 if (ERROR("SPACING",
5366 "space required after that close brace '}'\n" . $herecurr) &&
5368 $fixed[$fixlinenr] =~
5369 s/}((?!(?:,|;|\)))\S)/} $1/;
5373 # check spacing on square brackets
5374 if ($line =~ /\[\s/ && $line !~ /\[\s*$/) {
5375 if (ERROR("SPACING",
5376 "space prohibited after that open square bracket '['\n" . $herecurr) &&
5378 $fixed[$fixlinenr] =~
5382 if ($line =~ /\s\]/) {
5383 if (ERROR("SPACING",
5384 "space prohibited before that close square bracket ']'\n" . $herecurr) &&
5386 $fixed[$fixlinenr] =~
5391 # check spacing on parentheses
5392 if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
5393 $line !~ /for\s*\(\s+;/) {
5394 if (ERROR("SPACING",
5395 "space prohibited after that open parenthesis '('\n" . $herecurr) &&
5397 $fixed[$fixlinenr] =~
5401 if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ &&
5402 $line !~ /for\s*\(.*;\s+\)/ &&
5403 $line !~ /:\s+\)/) {
5404 if (ERROR("SPACING",
5405 "space prohibited before that close parenthesis ')'\n" . $herecurr) &&
5407 $fixed[$fixlinenr] =~
5412 # check unnecessary parentheses around addressof/dereference single $Lvals
5413 # ie: &(foo->bar) should be &foo->bar and *(foo->bar) should be *foo->bar
5415 while ($line =~ /(?:[^&]&\s*|\*)\(\s*($Ident\s*(?:$Member\s*)+)\s*\)/g) {
5417 if (CHK("UNNECESSARY_PARENTHESES",
5418 "Unnecessary parentheses around $var\n" . $herecurr) &&
5420 $fixed[$fixlinenr] =~ s/\(\s*\Q$var\E\s*\)/$var/;
5424 # check for unnecessary parentheses around function pointer uses
5425 # ie: (foo->bar)(); should be foo->bar();
5426 # but not "if (foo->bar) (" to avoid some false positives
5427 if ($line =~ /(\bif\s*|)(\(\s*$Ident\s*(?:$Member\s*)+\))[ \t]*\(/ && $1 !~ /^if/) {
5429 if (CHK("UNNECESSARY_PARENTHESES",
5430 "Unnecessary parentheses around function pointer $var\n" . $herecurr) &&
5432 my $var2 = deparenthesize($var);
5434 $fixed[$fixlinenr] =~ s/\Q$var\E/$var2/;
5438 # check for unnecessary parentheses around comparisons in if uses
5439 # when !drivers/staging or command-line uses --strict
5440 if (($realfile !~ m@^(?:drivers/staging/)@ || $check_orig) &&
5441 $perl_version_ok && defined($stat) &&
5442 $stat =~ /(^.\s*if\s*($balanced_parens))/) {
5444 my $test = substr($2, 1, -1);
5446 while ($test =~ /(?:^|[^\w\&\!\~])+\s*\(\s*([\&\!\~]?\s*$Lval\s*(?:$Compare\s*$FuncArg)?)\s*\)/g) {
5448 # avoid parentheses around potential macro args
5449 next if ($match =~ /^\s*\w+\s*$/);
5450 if (!defined($herectx)) {
5451 $herectx = $here . "\n";
5452 my $cnt = statement_rawlines($if_stat);
5453 for (my $n = 0; $n < $cnt; $n++) {
5454 my $rl = raw_line($linenr, $n);
5455 $herectx .= $rl . "\n";
5456 last if $rl =~ /^[ \+].*\{/;
5459 CHK("UNNECESSARY_PARENTHESES",
5460 "Unnecessary parentheses around '$match'\n" . $herectx);
5464 # check that goto labels aren't indented (allow a single space indentation)
5465 # and ignore bitfield definitions like foo:1
5466 # Strictly, labels can have whitespace after the identifier and before the :
5467 # but this is not allowed here as many ?: uses would appear to be labels
5468 if ($sline =~ /^.\s+[A-Za-z_][A-Za-z\d_]*:(?!\s*\d+)/ &&
5469 $sline !~ /^. [A-Za-z\d_][A-Za-z\d_]*:/ &&
5470 $sline !~ /^.\s+default:/) {
5471 if (WARN("INDENTED_LABEL",
5472 "labels should not be indented\n" . $herecurr) &&
5474 $fixed[$fixlinenr] =~
5479 # check if a statement with a comma should be two statements like:
5480 # foo = bar(), /* comma should be semicolon */
5482 if (defined($stat) &&
5483 $stat =~ /^\+\s*(?:$Lval\s*$Assignment\s*)?$FuncArg\s*,\s*(?:$Lval\s*$Assignment\s*)?$FuncArg\s*;\s*$/) {
5484 my $cnt = statement_rawlines($stat);
5485 my $herectx = get_stat_here($linenr, $cnt, $here);
5486 WARN("SUSPECT_COMMA_SEMICOLON",
5487 "Possible comma where semicolon could be used\n" . $herectx);
5490 # return is not a function
5491 if (defined($stat) && $stat =~ /^.\s*return(\s*)\(/s) {
5493 if ($perl_version_ok &&
5494 $stat =~ /^.\s*return\s*($balanced_parens)\s*;\s*$/) {
5496 $value = deparenthesize($value);
5497 if ($value =~ m/^\s*$FuncArg\s*(?:\?|$)/) {
5498 ERROR("RETURN_PARENTHESES",
5499 "return is not a function, parentheses are not required\n" . $herecurr);
5501 } elsif ($spacing !~ /\s+/) {
5503 "space required before the open parenthesis '('\n" . $herecurr);
5507 # unnecessary return in a void function
5508 # at end-of-function, with the previous line a single leading tab, then return;
5509 # and the line before that not a goto label target like "out:"
5510 if ($sline =~ /^[ \+]}\s*$/ &&
5511 $prevline =~ /^\+\treturn\s*;\s*$/ &&
5513 $lines[$linenr - 3] =~ /^[ +]/ &&
5514 $lines[$linenr - 3] !~ /^[ +]\s*$Ident\s*:/) {
5516 "void function return statements are not generally useful\n" . $hereprev);
5519 # if statements using unnecessary parentheses - ie: if ((foo == bar))
5520 if ($perl_version_ok &&
5521 $line =~ /\bif\s*((?:\(\s*){2,})/) {
5522 my $openparens = $1;
5523 my $count = $openparens =~ tr@\(@\(@;
5525 if ($line =~ /\bif\s*(?:\(\s*){$count,$count}$LvalOrFunc\s*($Compare)\s*$LvalOrFunc(?:\s*\)){$count,$count}/) {
5526 my $comp = $4; #Not $1 because of $LvalOrFunc
5527 $msg = " - maybe == should be = ?" if ($comp eq "==");
5528 WARN("UNNECESSARY_PARENTHESES",
5529 "Unnecessary parentheses$msg\n" . $herecurr);
5533 # comparisons with a constant or upper case identifier on the left
5534 # avoid cases like "foo + BAR < baz"
5535 # only fix matches surrounded by parentheses to avoid incorrect
5536 # conversions like "FOO < baz() + 5" being "misfixed" to "baz() > FOO + 5"
5537 if ($perl_version_ok &&
5538 $line =~ /^\+(.*)\b($Constant|[A-Z_][A-Z0-9_]*)\s*($Compare)\s*($LvalOrFunc)/) {
5543 my $newcomp = $comp;
5544 if ($lead !~ /(?:$Operators|\.)\s*$/ &&
5545 $to !~ /^(?:Constant|[A-Z_][A-Z0-9_]*)$/ &&
5546 WARN("CONSTANT_COMPARISON",
5547 "Comparisons should place the constant on the right side of the test\n" . $herecurr) &&
5551 } elsif ($comp eq "<=") {
5553 } elsif ($comp eq ">") {
5555 } elsif ($comp eq ">=") {
5558 $fixed[$fixlinenr] =~ s/\(\s*\Q$const\E\s*$Compare\s*\Q$to\E\s*\)/($to $newcomp $const)/;
5562 # Return of what appears to be an errno should normally be negative
5563 if ($sline =~ /\breturn(?:\s*\(+\s*|\s+)(E[A-Z]+)(?:\s*\)+\s*|\s*)[;:,]/) {
5565 if ($name ne 'EOF' && $name ne 'ERROR' && $name !~ /^EPOLL/) {
5566 WARN("USE_NEGATIVE_ERRNO",
5567 "return of an errno should typically be negative (ie: return -$1)\n" . $herecurr);
5571 # Need a space before open parenthesis after if, while etc
5572 if ($line =~ /\b(if|while|for|switch)\(/) {
5573 if (ERROR("SPACING",
5574 "space required before the open parenthesis '('\n" . $herecurr) &&
5576 $fixed[$fixlinenr] =~
5577 s/\b(if|while|for|switch)\(/$1 \(/;
5581 # Check for illegal assignment in if conditional -- and check for trailing
5582 # statements after the conditional.
5583 if ($line =~ /do\s*(?!{)/) {
5584 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
5585 ctx_statement_block($linenr, $realcnt, 0)
5586 if (!defined $stat);
5587 my ($stat_next) = ctx_statement_block($line_nr_next,
5588 $remain_next, $off_next);
5589 $stat_next =~ s/\n./\n /g;
5590 ##print "stat<$stat> stat_next<$stat_next>\n";
5592 if ($stat_next =~ /^\s*while\b/) {
5593 # If the statement carries leading newlines,
5594 # then count those as offsets.
5596 ($stat_next =~ /^((?:\s*\n[+-])*\s*)/s);
5598 statement_rawlines($whitespace) - 1;
5600 $suppress_whiletrailers{$line_nr_next +
5604 if (!defined $suppress_whiletrailers{$linenr} &&
5605 defined($stat) && defined($cond) &&
5606 $line =~ /\b(?:if|while|for)\s*\(/ && $line !~ /^.\s*#/) {
5607 my ($s, $c) = ($stat, $cond);
5608 my $fixed_assign_in_if = 0;
5610 if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/s) {
5611 if (ERROR("ASSIGN_IN_IF",
5612 "do not use assignment in if condition\n" . $herecurr) &&
5613 $fix && $perl_version_ok) {
5614 if ($rawline =~ /^\+(\s+)if\s*\(\s*(\!)?\s*\(\s*(($Lval)\s*=\s*$LvalOrFunc)\s*\)\s*(?:($Compare)\s*($FuncArg))?\s*\)\s*(\{)?\s*$/) {
5622 fix_delete_line($fixlinenr, $rawline);
5623 fix_insert_line($fixlinenr, "$space$statement;");
5624 my $newline = "${space}if (";
5625 $newline .= '!' if defined($not);
5626 $newline .= '(' if (defined $not && defined($test) && defined($against));
5627 $newline .= "$assigned";
5628 $newline .= " $test $against" if (defined($test) && defined($against));
5629 $newline .= ')' if (defined $not && defined($test) && defined($against));
5631 $newline .= " {" if (defined($brace));
5632 fix_insert_line($fixlinenr + 1, $newline);
5633 $fixed_assign_in_if = 1;
5638 # Find out what is on the end of the line after the
5640 substr($s, 0, length($c), '');
5642 $s =~ s/$;//g; # Remove any comments
5643 if (length($c) && $s !~ /^\s*{?\s*\\*\s*$/ &&
5644 $c !~ /}\s*while\s*/)
5646 # Find out how long the conditional actually is.
5647 my @newlines = ($c =~ /\n/gs);
5648 my $cond_lines = 1 + $#newlines;
5651 $stat_real = raw_line($linenr, $cond_lines)
5652 . "\n" if ($cond_lines);
5653 if (defined($stat_real) && $cond_lines > 1) {
5654 $stat_real = "[...]\n$stat_real";
5657 if (ERROR("TRAILING_STATEMENTS",
5658 "trailing statements should be on next line\n" . $herecurr . $stat_real) &&
5659 !$fixed_assign_in_if &&
5661 $fix && $perl_version_ok &&
5662 $fixed[$fixlinenr] =~ /^\+(\s*)((?:if|while|for)\s*$balanced_parens)\s*(.*)$/) {
5665 my $rest = rtrim($4);
5666 if ($rest =~ /;$/) {
5667 $fixed[$fixlinenr] = "\+$indent$test";
5668 fix_insert_line($fixlinenr + 1, "$indent\t$rest");
5674 # Check for bitwise tests written as boolean
5686 WARN("HEXADECIMAL_BOOLEAN_TEST",
5687 "boolean test with hexadecimal, perhaps just 1 \& or \|?\n" . $herecurr);
5690 # if and else should not have general statements after it
5691 if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/) {
5693 $s =~ s/$;//g; # Remove any comments
5694 if ($s !~ /^\s*(?:\sif|(?:{|)\s*\\?\s*$)/) {
5695 ERROR("TRAILING_STATEMENTS",
5696 "trailing statements should be on next line\n" . $herecurr);
5699 # if should not continue a brace
5700 if ($line =~ /}\s*if\b/) {
5701 ERROR("TRAILING_STATEMENTS",
5702 "trailing statements should be on next line (or did you mean 'else if'?)\n" .
5705 # case and default should not have general statements after them
5706 if ($line =~ /^.\s*(?:case\s*.*|default\s*):/g &&
5708 (?:\s*$;*)(?:\s*{)?(?:\s*$;*)(?:\s*\\)?\s*$|
5712 ERROR("TRAILING_STATEMENTS",
5713 "trailing statements should be on next line\n" . $herecurr);
5716 # Check for }<nl>else {, these must be at the same
5717 # indent level to be relevant to each other.
5718 if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ &&
5719 $previndent == $indent) {
5720 if (ERROR("ELSE_AFTER_BRACE",
5721 "else should follow close brace '}'\n" . $hereprev) &&
5722 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
5723 fix_delete_line($fixlinenr - 1, $prevrawline);
5724 fix_delete_line($fixlinenr, $rawline);
5725 my $fixedline = $prevrawline;
5726 $fixedline =~ s/}\s*$//;
5727 if ($fixedline !~ /^\+\s*$/) {
5728 fix_insert_line($fixlinenr, $fixedline);
5730 $fixedline = $rawline;
5731 $fixedline =~ s/^(.\s*)else/$1} else/;
5732 fix_insert_line($fixlinenr, $fixedline);
5736 if ($prevline=~/}\s*$/ and $line=~/^.\s*while\s*/ &&
5737 $previndent == $indent) {
5738 my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
5740 # Find out what is on the end of the line after the
5742 substr($s, 0, length($c), '');
5745 if ($s =~ /^\s*;/) {
5746 if (ERROR("WHILE_AFTER_BRACE",
5747 "while should follow close brace '}'\n" . $hereprev) &&
5748 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
5749 fix_delete_line($fixlinenr - 1, $prevrawline);
5750 fix_delete_line($fixlinenr, $rawline);
5751 my $fixedline = $prevrawline;
5752 my $trailing = $rawline;
5753 $trailing =~ s/^\+//;
5754 $trailing = trim($trailing);
5755 $fixedline =~ s/}\s*$/} $trailing/;
5756 fix_insert_line($fixlinenr, $fixedline);
5761 #Specific variable tests
5762 while ($line =~ m{($Constant|$Lval)}g) {
5766 if ($var !~ /^$Constant$/ &&
5767 $var =~ /[A-Z][a-z]|[a-z][A-Z]/ &&
5768 #Ignore some autogenerated defines and enum values
5769 $var !~ /^(?:[A-Z]+_){1,5}[A-Z]{1,3}[a-z]/ &&
5770 #Ignore Page<foo> variants
5771 $var !~ /^(?:Clear|Set|TestClear|TestSet|)Page[A-Z]/ &&
5772 #Ignore SI style variants like nS, mV and dB
5773 #(ie: max_uV, regulator_min_uA_show, RANGE_mA_VALUE)
5774 $var !~ /^(?:[a-z0-9_]*|[A-Z0-9_]*)?_?[a-z][A-Z](?:_[a-z0-9_]+|_[A-Z0-9_]+)?$/ &&
5775 #Ignore some three character SI units explicitly, like MiB and KHz
5776 $var !~ /^(?:[a-z_]*?)_?(?:[KMGT]iB|[KMGT]?Hz)(?:_[a-z_]+)?$/) {
5777 while ($var =~ m{\b($Ident)}g) {
5779 next if ($word !~ /[A-Z][a-z]|[a-z][A-Z]/);
5781 seed_camelcase_includes();
5782 if (!$file && !$camelcase_file_seeded) {
5783 seed_camelcase_file($realfile);
5784 $camelcase_file_seeded = 1;
5787 if (!defined $camelcase{$word}) {
5788 $camelcase{$word} = 1;
5790 "Avoid CamelCase: <$word>\n" . $herecurr);
5796 #no spaces allowed after \ in define
5797 if ($line =~ /\#\s*define.*\\\s+$/) {
5798 if (WARN("WHITESPACE_AFTER_LINE_CONTINUATION",
5799 "Whitespace after \\ makes next lines useless\n" . $herecurr) &&
5801 $fixed[$fixlinenr] =~ s/\s+$//;
5805 # warn if <asm/foo.h> is #included and <linux/foo.h> is available and includes
5806 # itself <asm/foo.h> (uses RAW line)
5807 if ($tree && $rawline =~ m{^.\s*\#\s*include\s*\<asm\/(.*)\.h\>}) {
5809 my $checkfile = "include/linux/$file";
5810 if (-f "$root/$checkfile" &&
5811 $realfile ne $checkfile &&
5812 $1 !~ /$allowed_asm_includes/)
5814 my $asminclude = `grep -Ec "#include\\s+<asm/$file>" $root/$checkfile`;
5815 if ($asminclude > 0) {
5816 if ($realfile =~ m{^arch/}) {
5817 CHK("ARCH_INCLUDE_LINUX",
5818 "Consider using #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
5820 WARN("INCLUDE_LINUX",
5821 "Use #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
5827 # multi-statement macros should be enclosed in a do while loop, grab the
5828 # first statement and ensure its the whole macro if its not enclosed
5829 # in a known good container
5830 if ($realfile !~ m@/vmlinux.lds.h$@ &&
5831 $line =~ /^.\s*\#\s*define\s*$Ident(\()?/) {
5834 my ($off, $dstat, $dcond, $rest);
5836 my $has_flow_statement = 0;
5837 my $has_arg_concat = 0;
5838 ($dstat, $dcond, $ln, $cnt, $off) =
5839 ctx_statement_block($linenr, $realcnt, 0);
5841 #print "dstat<$dstat> dcond<$dcond> cnt<$cnt> off<$off>\n";
5842 #print "LINE<$lines[$ln-1]> len<" . length($lines[$ln-1]) . "\n";
5844 $has_flow_statement = 1 if ($ctx =~ /\b(goto|return)\b/);
5845 $has_arg_concat = 1 if ($ctx =~ /\#\#/ && $ctx !~ /\#\#\s*(?:__VA_ARGS__|args)\b/);
5847 $dstat =~ s/^.\s*\#\s*define\s+$Ident(\([^\)]*\))?\s*//;
5848 my $define_args = $1;
5849 my $define_stmt = $dstat;
5852 if (defined $define_args && $define_args ne "") {
5853 $define_args = substr($define_args, 1, length($define_args) - 2);
5854 $define_args =~ s/\s*//g;
5855 $define_args =~ s/\\\+?//g;
5856 @def_args = split(",", $define_args);
5860 $dstat =~ s/\\\n.//g;
5861 $dstat =~ s/^\s*//s;
5862 $dstat =~ s/\s*$//s;
5864 # Flatten any parentheses and braces
5865 while ($dstat =~ s/\([^\(\)]*\)/1u/ ||
5866 $dstat =~ s/\{[^\{\}]*\}/1u/ ||
5867 $dstat =~ s/.\[[^\[\]]*\]/1u/)
5871 # Flatten any obvious string concatenation.
5872 while ($dstat =~ s/($String)\s*$Ident/$1/ ||
5873 $dstat =~ s/$Ident\s*($String)/$1/)
5877 # Make asm volatile uses seem like a generic function
5878 $dstat =~ s/\b_*asm_*\s+_*volatile_*\b/asm_volatile/g;
5880 my $exceptions = qr{
5893 #print "REST<$rest> dstat<$dstat> ctx<$ctx>\n";
5896 my $stmt_cnt = statement_rawlines($ctx);
5897 my $herectx = get_stat_here($linenr, $stmt_cnt, $here);
5900 $dstat !~ /^(?:$Ident|-?$Constant),$/ && # 10, // foo(),
5901 $dstat !~ /^(?:$Ident|-?$Constant);$/ && # foo();
5902 $dstat !~ /^[!~-]?(?:$Lval|$Constant)$/ && # 10 // foo() // !foo // ~foo // -foo // foo->bar // foo.bar->baz
5903 $dstat !~ /^'X'$/ && $dstat !~ /^'XX'$/ && # character constants
5904 $dstat !~ /$exceptions/ &&
5905 $dstat !~ /^\.$Ident\s*=/ && # .foo =
5906 $dstat !~ /^(?:\#\s*$Ident|\#\s*$Constant)\s*$/ && # stringification #foo
5907 $dstat !~ /^do\s*$Constant\s*while\s*$Constant;?$/ && # do {...} while (...); // do {...} while (...)
5908 $dstat !~ /^while\s*$Constant\s*$Constant\s*$/ && # while (...) {...}
5909 $dstat !~ /^for\s*$Constant$/ && # for (...)
5910 $dstat !~ /^for\s*$Constant\s+(?:$Ident|-?$Constant)$/ && # for (...) bar()
5911 $dstat !~ /^do\s*{/ && # do {...
5912 $dstat !~ /^\(\{/ && # ({...
5913 $ctx !~ /^.\s*#\s*define\s+TRACE_(?:SYSTEM|INCLUDE_FILE|INCLUDE_PATH)\b/)
5915 if ($dstat =~ /^\s*if\b/) {
5916 ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
5917 "Macros starting with if should be enclosed by a do - while loop to avoid possible if/else logic defects\n" . "$herectx");
5918 } elsif ($dstat =~ /;/) {
5919 ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
5920 "Macros with multiple statements should be enclosed in a do - while loop\n" . "$herectx");
5922 ERROR("COMPLEX_MACRO",
5923 "Macros with complex values should be enclosed in parentheses\n" . "$herectx");
5928 # Make $define_stmt single line, comment-free, etc
5929 my @stmt_array = split('\n', $define_stmt);
5932 foreach my $l (@stmt_array) {
5937 } elsif ($l =~ /^[\+ ]/) {
5938 $define_stmt .= substr($l, 1);
5941 $define_stmt =~ s/$;//g;
5942 $define_stmt =~ s/\s+/ /g;
5943 $define_stmt = trim($define_stmt);
5945 # check if any macro arguments are reused (ignore '...' and 'type')
5946 foreach my $arg (@def_args) {
5947 next if ($arg =~ /\.\.\./);
5948 next if ($arg =~ /^type$/i);
5949 my $tmp_stmt = $define_stmt;
5950 $tmp_stmt =~ s/\b(__must_be_array|offsetof|sizeof|sizeof_field|__stringify|typeof|__typeof__|__builtin\w+|typecheck\s*\(\s*$Type\s*,|\#+)\s*\(*\s*$arg\s*\)*\b//g;
5951 $tmp_stmt =~ s/\#+\s*$arg\b//g;
5952 $tmp_stmt =~ s/\b$arg\s*\#\#//g;
5953 my $use_cnt = () = $tmp_stmt =~ /\b$arg\b/g;
5955 CHK("MACRO_ARG_REUSE",
5956 "Macro argument reuse '$arg' - possible side-effects?\n" . "$herectx");
5958 # check if any macro arguments may have other precedence issues
5959 if ($tmp_stmt =~ m/($Operators)?\s*\b$arg\b\s*($Operators)?/m &&
5960 ((defined($1) && $1 ne ',') ||
5961 (defined($2) && $2 ne ','))) {
5962 CHK("MACRO_ARG_PRECEDENCE",
5963 "Macro argument '$arg' may be better as '($arg)' to avoid precedence issues\n" . "$herectx");
5967 # check for macros with flow control, but without ## concatenation
5968 # ## concatenation is commonly a macro that defines a function so ignore those
5969 if ($has_flow_statement && !$has_arg_concat) {
5970 my $cnt = statement_rawlines($ctx);
5971 my $herectx = get_stat_here($linenr, $cnt, $here);
5973 WARN("MACRO_WITH_FLOW_CONTROL",
5974 "Macros with flow control statements should be avoided\n" . "$herectx");
5977 # check for line continuations outside of #defines, preprocessor #, and asm
5980 if ($prevline !~ /^..*\\$/ &&
5981 $line !~ /^\+\s*\#.*\\$/ && # preprocessor
5982 $line !~ /^\+.*\b(__asm__|asm)\b.*\\$/ && # asm
5983 $line =~ /^\+.*\\$/) {
5984 WARN("LINE_CONTINUATIONS",
5985 "Avoid unnecessary line continuations\n" . $herecurr);
5989 # do {} while (0) macro tests:
5990 # single-statement macros do not need to be enclosed in do while (0) loop,
5991 # macro should not end with a semicolon
5992 if ($perl_version_ok &&
5993 $realfile !~ m@/vmlinux.lds.h$@ &&
5994 $line =~ /^.\s*\#\s*define\s+$Ident(\()?/) {
5997 my ($off, $dstat, $dcond, $rest);
5999 ($dstat, $dcond, $ln, $cnt, $off) =
6000 ctx_statement_block($linenr, $realcnt, 0);
6003 $dstat =~ s/\\\n.//g;
6006 if ($dstat =~ /^\+\s*#\s*define\s+$Ident\s*${balanced_parens}\s*do\s*{(.*)\s*}\s*while\s*\(\s*0\s*\)\s*([;\s]*)\s*$/) {
6011 my $cnt = statement_rawlines($ctx);
6012 my $herectx = get_stat_here($linenr, $cnt, $here);
6014 if (($stmts =~ tr/;/;/) == 1 &&
6015 $stmts !~ /^\s*(if|while|for|switch)\b/) {
6016 WARN("SINGLE_STATEMENT_DO_WHILE_MACRO",
6017 "Single statement macros should not use a do {} while (0) loop\n" . "$herectx");
6019 if (defined $semis && $semis ne "") {
6020 WARN("DO_WHILE_MACRO_WITH_TRAILING_SEMICOLON",
6021 "do {} while (0) macros should not be semicolon terminated\n" . "$herectx");
6023 } elsif ($dstat =~ /^\+\s*#\s*define\s+$Ident.*;\s*$/) {
6025 my $cnt = statement_rawlines($ctx);
6026 my $herectx = get_stat_here($linenr, $cnt, $here);
6028 WARN("TRAILING_SEMICOLON",
6029 "macros should not use a trailing semicolon\n" . "$herectx");
6033 # check for redundant bracing round if etc
6034 if ($line =~ /(^.*)\bif\b/ && $1 !~ /else\s*$/) {
6035 my ($level, $endln, @chunks) =
6036 ctx_statement_full($linenr, $realcnt, 1);
6037 #print "chunks<$#chunks> linenr<$linenr> endln<$endln> level<$level>\n";
6038 #print "APW: <<$chunks[1][0]>><<$chunks[1][1]>>\n";
6039 if ($#chunks > 0 && $level == 0) {
6043 my $herectx = $here . "\n";
6044 my $ln = $linenr - 1;
6045 for my $chunk (@chunks) {
6046 my ($cond, $block) = @{$chunk};
6048 # If the condition carries leading newlines, then count those as offsets.
6049 my ($whitespace) = ($cond =~ /^((?:\s*\n[+-])*\s*)/s);
6050 my $offset = statement_rawlines($whitespace) - 1;
6052 $allowed[$allow] = 0;
6053 #print "COND<$cond> whitespace<$whitespace> offset<$offset>\n";
6055 # We have looked at and allowed this specific line.
6056 $suppress_ifbraces{$ln + $offset} = 1;
6058 $herectx .= "$rawlines[$ln + $offset]\n[...]\n";
6059 $ln += statement_rawlines($block) - 1;
6061 substr($block, 0, length($cond), '');
6063 $seen++ if ($block =~ /^\s*{/);
6065 #print "cond<$cond> block<$block> allowed<$allowed[$allow]>\n";
6066 if (statement_lines($cond) > 1) {
6067 #print "APW: ALLOWED: cond<$cond>\n";
6068 $allowed[$allow] = 1;
6070 if ($block =~/\b(?:if|for|while)\b/) {
6071 #print "APW: ALLOWED: block<$block>\n";
6072 $allowed[$allow] = 1;
6074 if (statement_block_size($block) > 1) {
6075 #print "APW: ALLOWED: lines block<$block>\n";
6076 $allowed[$allow] = 1;
6081 my $sum_allowed = 0;
6082 foreach (@allowed) {
6085 if ($sum_allowed == 0) {
6087 "braces {} are not necessary for any arm of this statement\n" . $herectx);
6088 } elsif ($sum_allowed != $allow &&
6091 "braces {} should be used on all arms of this statement\n" . $herectx);
6096 if (!defined $suppress_ifbraces{$linenr - 1} &&
6097 $line =~ /\b(if|while|for|else)\b/) {
6100 # Check the pre-context.
6101 if (substr($line, 0, $-[0]) =~ /(\}\s*)$/) {
6102 #print "APW: ALLOWED: pre<$1>\n";
6106 my ($level, $endln, @chunks) =
6107 ctx_statement_full($linenr, $realcnt, $-[0]);
6109 # Check the condition.
6110 my ($cond, $block) = @{$chunks[0]};
6111 #print "CHECKING<$linenr> cond<$cond> block<$block>\n";
6112 if (defined $cond) {
6113 substr($block, 0, length($cond), '');
6115 if (statement_lines($cond) > 1) {
6116 #print "APW: ALLOWED: cond<$cond>\n";
6119 if ($block =~/\b(?:if|for|while)\b/) {
6120 #print "APW: ALLOWED: block<$block>\n";
6123 if (statement_block_size($block) > 1) {
6124 #print "APW: ALLOWED: lines block<$block>\n";
6127 # Check the post-context.
6128 if (defined $chunks[1]) {
6129 my ($cond, $block) = @{$chunks[1]};
6130 if (defined $cond) {
6131 substr($block, 0, length($cond), '');
6133 if ($block =~ /^\s*\{/) {
6134 #print "APW: ALLOWED: chunk-1 block<$block>\n";
6138 if ($level == 0 && $block =~ /^\s*\{/ && !$allowed) {
6139 my $cnt = statement_rawlines($block);
6140 my $herectx = get_stat_here($linenr, $cnt, $here);
6143 "braces {} are not necessary for single statement blocks\n" . $herectx);
6147 # check for single line unbalanced braces
6148 if ($sline =~ /^.\s*\}\s*else\s*$/ ||
6149 $sline =~ /^.\s*else\s*\{\s*$/) {
6150 CHK("BRACES", "Unbalanced braces around else statement\n" . $herecurr);
6153 # check for unnecessary blank lines around braces
6154 if (($line =~ /^.\s*}\s*$/ && $prevrawline =~ /^.\s*$/)) {
6156 "Blank lines aren't necessary before a close brace '}'\n" . $hereprev) &&
6157 $fix && $prevrawline =~ /^\+/) {
6158 fix_delete_line($fixlinenr - 1, $prevrawline);
6161 if (($rawline =~ /^.\s*$/ && $prevline =~ /^..*{\s*$/)) {
6163 "Blank lines aren't necessary after an open brace '{'\n" . $hereprev) &&
6165 fix_delete_line($fixlinenr, $rawline);
6169 # no volatiles please
6170 my $asm_volatile = qr{\b(__asm__|asm)\s+(__volatile__|volatile)\b};
6171 if ($line =~ /\bvolatile\b/ && $line !~ /$asm_volatile/) {
6173 "Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst\n" . $herecurr);
6176 # Check for user-visible strings broken across lines, which breaks the ability
6177 # to grep for the string. Make exceptions when the previous string ends in a
6178 # newline (multiple lines in one string constant) or '\t', '\r', ';', or '{'
6179 # (common in inline assembly) or is a octal \123 or hexadecimal \xaf value
6180 if ($line =~ /^\+\s*$String/ &&
6181 $prevline =~ /"\s*$/ &&
6182 $prevrawline !~ /(?:\\(?:[ntr]|[0-7]{1,3}|x[0-9a-fA-F]{1,2})|;\s*|\{\s*)"\s*$/) {
6183 if (WARN("SPLIT_STRING",
6184 "quoted string split across lines\n" . $hereprev) &&
6186 $prevrawline =~ /^\+.*"\s*$/ &&
6187 $last_coalesced_string_linenr != $linenr - 1) {
6188 my $extracted_string = get_quoted_string($line, $rawline);
6189 my $comma_close = "";
6190 if ($rawline =~ /\Q$extracted_string\E(\s*\)\s*;\s*$|\s*,\s*)/) {
6194 fix_delete_line($fixlinenr - 1, $prevrawline);
6195 fix_delete_line($fixlinenr, $rawline);
6196 my $fixedline = $prevrawline;
6197 $fixedline =~ s/"\s*$//;
6198 $fixedline .= substr($extracted_string, 1) . trim($comma_close);
6199 fix_insert_line($fixlinenr - 1, $fixedline);
6200 $fixedline = $rawline;
6201 $fixedline =~ s/\Q$extracted_string\E\Q$comma_close\E//;
6202 if ($fixedline !~ /\+\s*$/) {
6203 fix_insert_line($fixlinenr, $fixedline);
6205 $last_coalesced_string_linenr = $linenr;
6209 # check for missing a space in a string concatenation
6210 if ($prevrawline =~ /[^\\]\w"$/ && $rawline =~ /^\+[\t ]+"\w/) {
6211 WARN('MISSING_SPACE',
6212 "break quoted strings at a space character\n" . $hereprev);
6215 # check for an embedded function name in a string when the function is known
6216 # This does not work very well for -f --file checking as it depends on patch
6217 # context providing the function name or a single line form for in-file
6218 # function declarations
6219 if ($line =~ /^\+.*$String/ &&
6220 defined($context_function) &&
6221 get_quoted_string($line, $rawline) =~ /\b$context_function\b/ &&
6222 length(get_quoted_string($line, $rawline)) != (length($context_function) + 2)) {
6223 WARN("EMBEDDED_FUNCTION_NAME",
6224 "Prefer using '\"%s...\", __func__' to using '$context_function', this function's name, in a string\n" . $herecurr);
6227 # check for unnecessary function tracing like uses
6228 # This does not use $logFunctions because there are many instances like
6229 # 'dprintk(FOO, "%s()\n", __func__);' which do not match $logFunctions
6230 if ($rawline =~ /^\+.*\([^"]*"$tracing_logging_tags{0,3}%s(?:\s*\(\s*\)\s*)?$tracing_logging_tags{0,3}(?:\\n)?"\s*,\s*__func__\s*\)\s*;/) {
6231 if (WARN("TRACING_LOGGING",
6232 "Unnecessary ftrace-like logging - prefer using ftrace\n" . $herecurr) &&
6234 fix_delete_line($fixlinenr, $rawline);
6238 # check for spaces before a quoted newline
6239 if ($rawline =~ /^.*\".*\s\\n/) {
6240 if (WARN("QUOTED_WHITESPACE_BEFORE_NEWLINE",
6241 "unnecessary whitespace before a quoted newline\n" . $herecurr) &&
6243 $fixed[$fixlinenr] =~ s/^(\+.*\".*)\s+\\n/$1\\n/;
6248 # concatenated string without spaces between elements
6249 if ($line =~ /$String[A-Z_]/ ||
6250 ($line =~ /([A-Za-z0-9_]+)$String/ && $1 !~ /^[Lu]$/)) {
6251 if (CHK("CONCATENATED_STRING",
6252 "Concatenated strings should use spaces between elements\n" . $herecurr) &&
6254 while ($line =~ /($String)/g) {
6255 my $extracted_string = substr($rawline, $-[0], $+[0] - $-[0]);
6256 $fixed[$fixlinenr] =~ s/\Q$extracted_string\E([A-Za-z0-9_])/$extracted_string $1/;
6257 $fixed[$fixlinenr] =~ s/([A-Za-z0-9_])\Q$extracted_string\E/$1 $extracted_string/;
6262 # uncoalesced string fragments
6263 if ($line =~ /$String\s*[Lu]?"/) {
6264 if (WARN("STRING_FRAGMENTS",
6265 "Consecutive strings are generally better as a single string\n" . $herecurr) &&
6267 while ($line =~ /($String)(?=\s*")/g) {
6268 my $extracted_string = substr($rawline, $-[0], $+[0] - $-[0]);
6269 $fixed[$fixlinenr] =~ s/\Q$extracted_string\E\s*"/substr($extracted_string, 0, -1)/e;
6274 # check for non-standard and hex prefixed decimal printf formats
6275 my $show_L = 1; #don't show the same defect twice
6277 while ($line =~ /(?:^|")([X\t]*)(?:"|$)/g) {
6278 my $string = substr($rawline, $-[1], $+[1] - $-[1]);
6279 $string =~ s/%%/__/g;
6281 if ($show_L && $string =~ /%[\*\d\.\$]*L([diouxX])/) {
6283 "\%L$1 is non-standard C, use %ll$1\n" . $herecurr);
6287 if ($show_Z && $string =~ /%[\*\d\.\$]*Z([diouxX])/) {
6289 "%Z$1 is non-standard C, use %z$1\n" . $herecurr);
6292 # check for 0x<decimal>
6293 if ($string =~ /0x%[\*\d\.\$\Llzth]*[diou]/) {
6294 ERROR("PRINTF_0XDECIMAL",
6295 "Prefixing 0x with decimal output is defective\n" . $herecurr);
6299 # check for line continuations in quoted strings with odd counts of "
6300 if ($rawline =~ /\\$/ && $sline =~ tr/"/"/ % 2) {
6301 WARN("LINE_CONTINUATIONS",
6302 "Avoid line continuations in quoted strings\n" . $herecurr);
6306 if ($line =~ /^.\s*\#\s*if\s+0\b/) {
6308 "Consider removing the code enclosed by this #if 0 and its #endif\n" . $herecurr);
6312 if ($line =~ /^.\s*\#\s*if\s+1\b/) {
6314 "Consider removing the #if 1 and its #endif\n" . $herecurr);
6317 # check for needless "if (<foo>) fn(<foo>)" uses
6318 if ($prevline =~ /\bif\s*\(\s*($Lval)\s*\)/) {
6319 my $tested = quotemeta($1);
6320 my $expr = '\s*\(\s*' . $tested . '\s*\)\s*;';
6321 if ($line =~ /\b(kfree|usb_free_urb|debugfs_remove(?:_recursive)?|(?:kmem_cache|mempool|dma_pool)_destroy)$expr/) {
6323 if (WARN('NEEDLESS_IF',
6324 "$func(NULL) is safe and this check is probably not required\n" . $hereprev) &&
6327 my $leading_tabs = "";
6328 my $new_leading_tabs = "";
6329 if ($lines[$linenr - 2] =~ /^\+(\t*)if\s*\(\s*$tested\s*\)\s*$/) {
6334 if ($lines[$linenr - 1] =~ /^\+(\t+)$func\s*\(\s*$tested\s*\)\s*;\s*$/) {
6335 $new_leading_tabs = $1;
6336 if (length($leading_tabs) + 1 ne length($new_leading_tabs)) {
6343 fix_delete_line($fixlinenr - 1, $prevrawline);
6344 $fixed[$fixlinenr] =~ s/^\+$new_leading_tabs/\+$leading_tabs/;
6350 # check for unnecessary "Out of Memory" messages
6351 if ($line =~ /^\+.*\b$logFunctions\s*\(/ &&
6352 $prevline =~ /^[ \+]\s*if\s*\(\s*(\!\s*|NULL\s*==\s*)?($Lval)(\s*==\s*NULL\s*)?\s*\)/ &&
6353 (defined $1 || defined $3) &&
6356 my $testline = $lines[$linenr - 3];
6358 my ($s, $c) = ctx_statement_block($linenr - 3, $realcnt, 0);
6359 # print("line: <$line>\nprevline: <$prevline>\ns: <$s>\nc: <$c>\n\n\n");
6361 if ($s =~ /(?:^|\n)[ \+]\s*(?:$Type\s*)?\Q$testval\E\s*=\s*(?:\([^\)]*\)\s*)?\s*$allocFunctions\s*\(/ &&
6362 $s !~ /\b__GFP_NOWARN\b/ ) {
6364 "Possible unnecessary 'out of memory' message\n" . $hereprev);
6368 # check for logging functions with KERN_<LEVEL>
6369 if ($line !~ /printk(?:_ratelimited|_once)?\s*\(/ &&
6370 $line =~ /\b$logFunctions\s*\(.*\b(KERN_[A-Z]+)\b/) {
6372 if (WARN("UNNECESSARY_KERN_LEVEL",
6373 "Possible unnecessary $level\n" . $herecurr) &&
6375 $fixed[$fixlinenr] =~ s/\s*$level\s*//;
6379 # check for logging continuations
6380 if ($line =~ /\bprintk\s*\(\s*KERN_CONT\b|\bpr_cont\s*\(/) {
6381 WARN("LOGGING_CONTINUATION",
6382 "Avoid logging continuation uses where feasible\n" . $herecurr);
6385 # check for unnecessary use of %h[xudi] and %hh[xudi] in logging functions
6386 if (defined $stat &&
6387 $line =~ /\b$logFunctions\s*\(/ &&
6388 index($stat, '"') >= 0) {
6389 my $lc = $stat =~ tr@\n@@;
6390 $lc = $lc + $linenr;
6391 my $stat_real = get_stat_real($linenr, $lc);
6392 pos($stat_real) = index($stat_real, '"');
6393 while ($stat_real =~ /[^\"%]*(%[\#\d\.\*\-]*(h+)[idux])/g) {
6396 my $lineoff = substr($stat_real, 0, $-[1]) =~ tr@\n@@;
6397 if (WARN("UNNECESSARY_MODIFIER",
6398 "Integer promotion: Using '$h' in '$pspec' is unnecessary\n" . "$here\n$stat_real\n") &&
6399 $fix && $fixed[$fixlinenr + $lineoff] =~ /^\+/) {
6402 $fixed[$fixlinenr + $lineoff] =~ s/\Q$pspec\E/$nspec/;
6407 # check for mask then right shift without a parentheses
6408 if ($perl_version_ok &&
6409 $line =~ /$LvalOrFunc\s*\&\s*($LvalOrFunc)\s*>>/ &&
6410 $4 !~ /^\&/) { # $LvalOrFunc may be &foo, ignore if so
6411 WARN("MASK_THEN_SHIFT",
6412 "Possible precedence defect with mask then right shift - may need parentheses\n" . $herecurr);
6415 # check for pointer comparisons to NULL
6416 if ($perl_version_ok) {
6417 while ($line =~ /\b$LvalOrFunc\s*(==|\!=)\s*NULL\b/g) {
6420 $equal = "" if ($4 eq "!=");
6421 if (CHK("COMPARISON_TO_NULL",
6422 "Comparison to NULL could be written \"${equal}${val}\"\n" . $herecurr) &&
6424 $fixed[$fixlinenr] =~ s/\b\Q$val\E\s*(?:==|\!=)\s*NULL\b/$equal$val/;
6429 # check for bad placement of section $InitAttribute (e.g.: __initdata)
6430 if ($line =~ /(\b$InitAttribute\b)/) {
6432 if ($line =~ /^\+\s*static\s+(?:const\s+)?(?:$attr\s+)?($NonptrTypeWithAttr)\s+(?:$attr\s+)?($Ident(?:\[[^]]*\])?)\s*[=;]/) {
6435 if ((($ptr =~ /\b(union|struct)\s+$attr\b/ &&
6436 ERROR("MISPLACED_INIT",
6437 "$attr should be placed after $var\n" . $herecurr)) ||
6438 ($ptr !~ /\b(union|struct)\s+$attr\b/ &&
6439 WARN("MISPLACED_INIT",
6440 "$attr should be placed after $var\n" . $herecurr))) &&
6442 $fixed[$fixlinenr] =~ s/(\bstatic\s+(?:const\s+)?)(?:$attr\s+)?($NonptrTypeWithAttr)\s+(?:$attr\s+)?($Ident(?:\[[^]]*\])?)\s*([=;])\s*/"$1" . trim(string_find_replace($2, "\\s*$attr\\s*", " ")) . " " . trim(string_find_replace($3, "\\s*$attr\\s*", "")) . " $attr" . ("$4" eq ";" ? ";" : " = ")/e;
6447 # check for $InitAttributeData (ie: __initdata) with const
6448 if ($line =~ /\bconst\b/ && $line =~ /($InitAttributeData)/) {
6450 $attr =~ /($InitAttributePrefix)(.*)/;
6451 my $attr_prefix = $1;
6453 if (ERROR("INIT_ATTRIBUTE",
6454 "Use of const init definition must use ${attr_prefix}initconst\n" . $herecurr) &&
6456 $fixed[$fixlinenr] =~
6457 s/$InitAttributeData/${attr_prefix}initconst/;
6461 # check for $InitAttributeConst (ie: __initconst) without const
6462 if ($line !~ /\bconst\b/ && $line =~ /($InitAttributeConst)/) {
6464 if (ERROR("INIT_ATTRIBUTE",
6465 "Use of $attr requires a separate use of const\n" . $herecurr) &&
6467 my $lead = $fixed[$fixlinenr] =~
6468 /(^\+\s*(?:static\s+))/;
6470 $lead = "$lead " if ($lead !~ /^\+$/);
6471 $lead = "${lead}const ";
6472 $fixed[$fixlinenr] =~ s/(^\+\s*(?:static\s+))/$lead/;
6476 # check for __read_mostly with const non-pointer (should just be const)
6477 if ($line =~ /\b__read_mostly\b/ &&
6478 $line =~ /($Type)\s*$Ident/ && $1 !~ /\*\s*$/ && $1 =~ /\bconst\b/) {
6479 if (ERROR("CONST_READ_MOSTLY",
6480 "Invalid use of __read_mostly with const type\n" . $herecurr) &&
6482 $fixed[$fixlinenr] =~ s/\s+__read_mostly\b//;
6486 # don't use __constant_<foo> functions outside of include/uapi/
6487 if ($realfile !~ m@^include/uapi/@ &&
6488 $line =~ /(__constant_(?:htons|ntohs|[bl]e(?:16|32|64)_to_cpu|cpu_to_[bl]e(?:16|32|64)))\s*\(/) {
6489 my $constant_func = $1;
6490 my $func = $constant_func;
6491 $func =~ s/^__constant_//;
6492 if (WARN("CONSTANT_CONVERSION",
6493 "$constant_func should be $func\n" . $herecurr) &&
6495 $fixed[$fixlinenr] =~ s/\b$constant_func\b/$func/g;
6499 # prefer usleep_range over udelay
6500 if ($line =~ /\budelay\s*\(\s*(\d+)\s*\)/) {
6502 # ignore udelay's < 10, however
6503 if (! ($delay < 10) ) {
6505 "usleep_range is preferred over udelay; see Documentation/timers/timers-howto.rst\n" . $herecurr);
6507 if ($delay > 2000) {
6509 "long udelay - prefer mdelay; see arch/arm/include/asm/delay.h\n" . $herecurr);
6513 # warn about unexpectedly long msleep's
6514 if ($line =~ /\bmsleep\s*\((\d+)\);/) {
6517 "msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.rst\n" . $herecurr);
6521 # check for comparisons of jiffies
6522 if ($line =~ /\bjiffies\s*$Compare|$Compare\s*jiffies\b/) {
6523 WARN("JIFFIES_COMPARISON",
6524 "Comparing jiffies is almost always wrong; prefer time_after, time_before and friends\n" . $herecurr);
6527 # check for comparisons of get_jiffies_64()
6528 if ($line =~ /\bget_jiffies_64\s*\(\s*\)\s*$Compare|$Compare\s*get_jiffies_64\s*\(\s*\)/) {
6529 WARN("JIFFIES_COMPARISON",
6530 "Comparing get_jiffies_64() is almost always wrong; prefer time_after64, time_before64 and friends\n" . $herecurr);
6533 # warn about #ifdefs in C files
6534 # if ($line =~ /^.\s*\#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
6535 # print "#ifdef in C files should be avoided\n";
6536 # print "$herecurr";
6540 # warn about spacing in #ifdefs
6541 if ($line =~ /^.\s*\#\s*(ifdef|ifndef|elif)\s\s+/) {
6542 if (ERROR("SPACING",
6543 "exactly one space required after that #$1\n" . $herecurr) &&
6545 $fixed[$fixlinenr] =~
6546 s/^(.\s*\#\s*(ifdef|ifndef|elif))\s{2,}/$1 /;
6551 # check for spinlock_t definitions without a comment.
6552 if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/ ||
6553 $line =~ /^.\s*(DEFINE_MUTEX)\s*\(/) {
6555 if (!ctx_has_comment($first_line, $linenr)) {
6556 CHK("UNCOMMENTED_DEFINITION",
6557 "$1 definition without comment\n" . $herecurr);
6560 # check for memory barriers without a comment.
6567 my $barrier_stems = qr{
6575 my $all_barriers = qr{
6577 smp_(?:$barrier_stems)|
6578 virt_(?:$barrier_stems)
6581 if ($line =~ /\b(?:$all_barriers)\s*\(/) {
6582 if (!ctx_has_comment($first_line, $linenr)) {
6583 WARN("MEMORY_BARRIER",
6584 "memory barrier without comment\n" . $herecurr);
6588 my $underscore_smp_barriers = qr{__smp_(?:$barrier_stems)}x;
6590 if ($realfile !~ m@^include/asm-generic/@ &&
6591 $realfile !~ m@/barrier\.h$@ &&
6592 $line =~ m/\b(?:$underscore_smp_barriers)\s*\(/ &&
6593 $line !~ m/^.\s*\#\s*define\s+(?:$underscore_smp_barriers)\s*\(/) {
6594 WARN("MEMORY_BARRIER",
6595 "__smp memory barriers shouldn't be used outside barrier.h and asm-generic\n" . $herecurr);
6598 # check for waitqueue_active without a comment.
6599 if ($line =~ /\bwaitqueue_active\s*\(/) {
6600 if (!ctx_has_comment($first_line, $linenr)) {
6601 WARN("WAITQUEUE_ACTIVE",
6602 "waitqueue_active without comment\n" . $herecurr);
6606 # check for data_race without a comment.
6607 if ($line =~ /\bdata_race\s*\(/) {
6608 if (!ctx_has_comment($first_line, $linenr)) {
6610 "data_race without comment\n" . $herecurr);
6614 # check of hardware specific defines
6615 if ($line =~ m@^.\s*\#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@ && $realfile !~ m@include/asm-@) {
6617 "architecture specific defines should be avoided\n" . $herecurr);
6620 # check that the storage class is not after a type
6621 if ($line =~ /\b($Type)\s+($Storage)\b/) {
6622 WARN("STORAGE_CLASS",
6623 "storage class '$2' should be located before type '$1'\n" . $herecurr);
6625 # Check that the storage class is at the beginning of a declaration
6626 if ($line =~ /\b$Storage\b/ &&
6627 $line !~ /^.\s*$Storage/ &&
6628 $line =~ /^.\s*(.+?)\$Storage\s/ &&
6629 $1 !~ /[\,\)]\s*$/) {
6630 WARN("STORAGE_CLASS",
6631 "storage class should be at the beginning of the declaration\n" . $herecurr);
6634 # check the location of the inline attribute, that it is between
6635 # storage class and type.
6636 if ($line =~ /\b$Type\s+$Inline\b/ ||
6637 $line =~ /\b$Inline\s+$Storage\b/) {
6638 ERROR("INLINE_LOCATION",
6639 "inline keyword should sit between storage class and type\n" . $herecurr);
6642 # Check for __inline__ and __inline, prefer inline
6643 if ($realfile !~ m@\binclude/uapi/@ &&
6644 $line =~ /\b(__inline__|__inline)\b/) {
6646 "plain inline is preferred over $1\n" . $herecurr) &&
6648 $fixed[$fixlinenr] =~ s/\b(__inline__|__inline)\b/inline/;
6653 # Check for compiler attributes
6654 if ($realfile !~ m@\binclude/uapi/@ &&
6655 $rawline =~ /\b__attribute__\s*\(\s*($balanced_parens)\s*\)/) {
6657 $attr =~ s/\s*\(\s*(.*)\)\s*/$1/;
6660 "alias" => "__alias",
6661 "aligned" => "__aligned",
6662 "always_inline" => "__always_inline",
6663 "assume_aligned" => "__assume_aligned",
6665 "const" => "__attribute_const__",
6667 "designated_init" => "__designated_init",
6668 "externally_visible" => "__visible",
6669 "format" => "printf|scanf",
6670 "gnu_inline" => "__gnu_inline",
6671 "malloc" => "__malloc",
6673 "no_caller_saved_registers" => "__no_caller_saved_registers",
6674 "noclone" => "__noclone",
6675 "noinline" => "noinline",
6676 "nonstring" => "__nonstring",
6677 "noreturn" => "__noreturn",
6678 "packed" => "__packed",
6680 "section" => "__section",
6685 while ($attr =~ /\s*(\w+)\s*(${balanced_parens})?/g) {
6688 $params = $2 if defined($2);
6689 my $curr_attr = $orig_attr;
6690 $curr_attr =~ s/^[\s_]+|[\s_]+$//g;
6691 if (exists($attr_list{$curr_attr})) {
6692 my $new = $attr_list{$curr_attr};
6693 if ($curr_attr eq "format" && $params) {
6694 $params =~ /^\s*\(\s*(\w+)\s*,\s*(.*)/;
6697 $new = "$new$params";
6699 if (WARN("PREFER_DEFINED_ATTRIBUTE_MACRO",
6700 "Prefer $new over __attribute__(($orig_attr$params))\n" . $herecurr) &&
6702 my $remove = "\Q$orig_attr\E" . '\s*' . "\Q$params\E" . '(?:\s*,\s*)?';
6703 $fixed[$fixlinenr] =~ s/$remove//;
6704 $fixed[$fixlinenr] =~ s/\b__attribute__/$new __attribute__/;
6705 $fixed[$fixlinenr] =~ s/\}\Q$new\E/} $new/;
6706 $fixed[$fixlinenr] =~ s/ __attribute__\s*\(\s*\(\s*\)\s*\)//;
6711 # Check for __attribute__ unused, prefer __always_unused or __maybe_unused
6712 if ($attr =~ /^_*unused/) {
6713 WARN("PREFER_DEFINED_ATTRIBUTE_MACRO",
6714 "__always_unused or __maybe_unused is preferred over __attribute__((__unused__))\n" . $herecurr);
6718 # Check for __attribute__ weak, or __weak declarations (may have link issues)
6719 if ($perl_version_ok &&
6720 $line =~ /(?:$Declare|$DeclareMisordered)\s*$Ident\s*$balanced_parens\s*(?:$Attribute)?\s*;/ &&
6721 ($line =~ /\b__attribute__\s*\(\s*\(.*\bweak\b/ ||
6722 $line =~ /\b__weak\b/)) {
6723 ERROR("WEAK_DECLARATION",
6724 "Using weak declarations can have unintended link defects\n" . $herecurr);
6727 # check for c99 types like uint8_t used outside of uapi/ and tools/
6728 if ($realfile !~ m@\binclude/uapi/@ &&
6729 $realfile !~ m@\btools/@ &&
6730 $line =~ /\b($Declare)\s*$Ident\s*[=;,\[]/) {
6732 if ($type =~ /\b($typeC99Typedefs)\b/) {
6734 my $kernel_type = 'u';
6735 $kernel_type = 's' if ($type =~ /^_*[si]/);
6738 if (CHK("PREFER_KERNEL_TYPES",
6739 "Prefer kernel type '$kernel_type' over '$type'\n" . $herecurr) &&
6741 $fixed[$fixlinenr] =~ s/\b$type\b/$kernel_type/;
6746 # check for cast of C90 native int or longer types constants
6747 if ($line =~ /(\(\s*$C90_int_types\s*\)\s*)($Constant)\b/) {
6751 my $newconst = $const;
6752 $newconst =~ s/${Int_type}$//;
6753 $suffix .= 'U' if ($cast =~ /\bunsigned\b/);
6754 if ($cast =~ /\blong\s+long\b/) {
6756 } elsif ($cast =~ /\blong\b/) {
6759 if (WARN("TYPECAST_INT_CONSTANT",
6760 "Unnecessary typecast of c90 int constant - '$cast$const' could be '$const$suffix'\n" . $herecurr) &&
6762 $fixed[$fixlinenr] =~ s/\Q$cast\E$const\b/$newconst$suffix/;
6766 # check for sizeof(&)
6767 if ($line =~ /\bsizeof\s*\(\s*\&/) {
6768 WARN("SIZEOF_ADDRESS",
6769 "sizeof(& should be avoided\n" . $herecurr);
6772 # check for sizeof without parenthesis
6773 if ($line =~ /\bsizeof\s+((?:\*\s*|)$Lval|$Type(?:\s+$Lval|))/) {
6774 if (WARN("SIZEOF_PARENTHESIS",
6775 "sizeof $1 should be sizeof($1)\n" . $herecurr) &&
6777 $fixed[$fixlinenr] =~ s/\bsizeof\s+((?:\*\s*|)$Lval|$Type(?:\s+$Lval|))/"sizeof(" . trim($1) . ")"/ex;
6781 # check for struct spinlock declarations
6782 if ($line =~ /^.\s*\bstruct\s+spinlock\s+\w+\s*;/) {
6783 WARN("USE_SPINLOCK_T",
6784 "struct spinlock should be spinlock_t\n" . $herecurr);
6787 # check for seq_printf uses that could be seq_puts
6788 if ($sline =~ /\bseq_printf\s*\(.*"\s*\)\s*;\s*$/) {
6789 my $fmt = get_quoted_string($line, $rawline);
6792 if (WARN("PREFER_SEQ_PUTS",
6793 "Prefer seq_puts to seq_printf\n" . $herecurr) &&
6795 $fixed[$fixlinenr] =~ s/\bseq_printf\b/seq_puts/;
6800 # check for vsprintf extension %p<foo> misuses
6801 if ($perl_version_ok &&
6803 $stat =~ /^\+(?![^\{]*\{\s*).*\b(\w+)\s*\(.*$String\s*,/s &&
6804 $1 !~ /^_*volatile_*$/) {
6807 my $lc = $stat =~ tr@\n@@;
6808 $lc = $lc + $linenr;
6809 for (my $count = $linenr; $count <= $lc; $count++) {
6813 my $bad_specifier = "";
6814 my $fmt = get_quoted_string($lines[$count - 1], raw_line($count, 0));
6817 while ($fmt =~ /(\%[\*\d\.]*p(\w)(\w*))/g) {
6821 if ($extension !~ /[4SsBKRraEehMmIiUDdgVCbGNOxtf]/ ||
6822 ($extension eq "f" &&
6823 defined $qualifier && $qualifier !~ /^w/) ||
6824 ($extension eq "4" &&
6825 defined $qualifier && $qualifier !~ /^cc/)) {
6826 $bad_specifier = $specifier;
6829 if ($extension eq "x" && !defined($stat_real)) {
6830 if (!defined($stat_real)) {
6831 $stat_real = get_stat_real($linenr, $lc);
6833 WARN("VSPRINTF_SPECIFIER_PX",
6834 "Using vsprintf specifier '\%px' potentially exposes the kernel memory layout, if you don't really need the address please consider using '\%p'.\n" . "$here\n$stat_real\n");
6837 if ($bad_specifier ne "") {
6838 my $stat_real = get_stat_real($linenr, $lc);
6839 my $ext_type = "Invalid";
6841 if ($bad_specifier =~ /p[Ff]/) {
6842 $use = " - use %pS instead";
6843 $use =~ s/pS/ps/ if ($bad_specifier =~ /pf/);
6846 WARN("VSPRINTF_POINTER_EXTENSION",
6847 "$ext_type vsprintf pointer extension '$bad_specifier'$use\n" . "$here\n$stat_real\n");
6852 # Check for misused memsets
6853 if ($perl_version_ok &&
6855 $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*$FuncArg\s*\)/) {
6861 if ($ms_size =~ /^(0x|)0$/i) {
6863 "memset to 0's uses 0 as the 2nd argument, not the 3rd\n" . "$here\n$stat\n");
6864 } elsif ($ms_size =~ /^(0x|)1$/i) {
6866 "single byte memset is suspicious. Swapped 2nd/3rd argument?\n" . "$here\n$stat\n");
6870 # Check for memcpy(foo, bar, ETH_ALEN) that could be ether_addr_copy(foo, bar)
6871 # if ($perl_version_ok &&
6873 # $stat =~ /^\+(?:.*?)\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
6874 # if (WARN("PREFER_ETHER_ADDR_COPY",
6875 # "Prefer ether_addr_copy() over memcpy() if the Ethernet addresses are __aligned(2)\n" . "$here\n$stat\n") &&
6877 # $fixed[$fixlinenr] =~ s/\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/ether_addr_copy($2, $7)/;
6881 # Check for memcmp(foo, bar, ETH_ALEN) that could be ether_addr_equal*(foo, bar)
6882 # if ($perl_version_ok &&
6884 # $stat =~ /^\+(?:.*?)\bmemcmp\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
6885 # WARN("PREFER_ETHER_ADDR_EQUAL",
6886 # "Prefer ether_addr_equal() or ether_addr_equal_unaligned() over memcmp()\n" . "$here\n$stat\n")
6889 # check for memset(foo, 0x0, ETH_ALEN) that could be eth_zero_addr
6890 # check for memset(foo, 0xFF, ETH_ALEN) that could be eth_broadcast_addr
6891 # if ($perl_version_ok &&
6893 # $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
6897 # if ($ms_val =~ /^(?:0x|)0+$/i) {
6898 # if (WARN("PREFER_ETH_ZERO_ADDR",
6899 # "Prefer eth_zero_addr over memset()\n" . "$here\n$stat\n") &&
6901 # $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_zero_addr($2)/;
6903 # } elsif ($ms_val =~ /^(?:0xff|255)$/i) {
6904 # if (WARN("PREFER_ETH_BROADCAST_ADDR",
6905 # "Prefer eth_broadcast_addr() over memset()\n" . "$here\n$stat\n") &&
6907 # $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_broadcast_addr($2)/;
6912 # strlcpy uses that should likely be strscpy
6913 if ($line =~ /\bstrlcpy\s*\(/) {
6915 "Prefer strscpy over strlcpy - see: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw\@mail.gmail.com/\n" . $herecurr);
6918 # typecasts on min/max could be min_t/max_t
6919 if ($perl_version_ok &&
6921 $stat =~ /^\+(?:.*?)\b(min|max)\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\)/) {
6922 if (defined $2 || defined $7) {
6924 my $cast1 = deparenthesize($2);
6926 my $cast2 = deparenthesize($7);
6930 if ($cast1 ne "" && $cast2 ne "" && $cast1 ne $cast2) {
6931 $cast = "$cast1 or $cast2";
6932 } elsif ($cast1 ne "") {
6938 "$call() should probably be ${call}_t($cast, $arg1, $arg2)\n" . "$here\n$stat\n");
6942 # check usleep_range arguments
6943 if ($perl_version_ok &&
6945 $stat =~ /^\+(?:.*?)\busleep_range\s*\(\s*($FuncArg)\s*,\s*($FuncArg)\s*\)/) {
6949 WARN("USLEEP_RANGE",
6950 "usleep_range should not use min == max args; see Documentation/timers/timers-howto.rst\n" . "$here\n$stat\n");
6951 } elsif ($min =~ /^\d+$/ && $max =~ /^\d+$/ &&
6953 WARN("USLEEP_RANGE",
6954 "usleep_range args reversed, use min then max; see Documentation/timers/timers-howto.rst\n" . "$here\n$stat\n");
6958 # check for naked sscanf
6959 if ($perl_version_ok &&
6961 $line =~ /\bsscanf\b/ &&
6962 ($stat !~ /$Ident\s*=\s*sscanf\s*$balanced_parens/ &&
6963 $stat !~ /\bsscanf\s*$balanced_parens\s*(?:$Compare)/ &&
6964 $stat !~ /(?:$Compare)\s*\bsscanf\s*$balanced_parens/)) {
6965 my $lc = $stat =~ tr@\n@@;
6966 $lc = $lc + $linenr;
6967 my $stat_real = get_stat_real($linenr, $lc);
6968 WARN("NAKED_SSCANF",
6969 "unchecked sscanf return value\n" . "$here\n$stat_real\n");
6972 # check for simple sscanf that should be kstrto<foo>
6973 if ($perl_version_ok &&
6975 $line =~ /\bsscanf\b/) {
6976 my $lc = $stat =~ tr@\n@@;
6977 $lc = $lc + $linenr;
6978 my $stat_real = get_stat_real($linenr, $lc);
6979 if ($stat_real =~ /\bsscanf\b\s*\(\s*$FuncArg\s*,\s*("[^"]+")/) {
6981 my $count = $format =~ tr@%@%@;
6983 $format =~ /^"\%(?i:ll[udxi]|[udxi]ll|ll|[hl]h?[udxi]|[udxi][hl]h?|[hl]h?|[udxi])"$/) {
6984 WARN("SSCANF_TO_KSTRTO",
6985 "Prefer kstrto<type> to single variable sscanf\n" . "$here\n$stat_real\n");
6990 # check for new externs in .h files.
6991 if ($realfile =~ /\.h$/ &&
6992 $line =~ /^\+\s*(extern\s+)$Type\s*$Ident\s*\(/s) {
6993 if (CHK("AVOID_EXTERNS",
6994 "extern prototypes should be avoided in .h files\n" . $herecurr) &&
6996 $fixed[$fixlinenr] =~ s/(.*)\bextern\b\s*(.*)/$1$2/;
7000 # check for new externs in .c files.
7001 if ($realfile =~ /\.c$/ && defined $stat &&
7002 $stat =~ /^.\s*(?:extern\s+)?$Type\s+($Ident)(\s*)\(/s)
7004 my $function_name = $1;
7005 my $paren_space = $2;
7008 if (defined $cond) {
7009 substr($s, 0, length($cond), '');
7013 WARN("AVOID_EXTERNS",
7014 "externs should be avoided in .c files\n" . $herecurr);
7017 if ($paren_space =~ /\n/) {
7018 WARN("FUNCTION_ARGUMENTS",
7019 "arguments for function declarations should follow identifier\n" . $herecurr);
7022 } elsif ($realfile =~ /\.c$/ && defined $stat &&
7023 $stat =~ /^.\s*extern\s+/)
7025 WARN("AVOID_EXTERNS",
7026 "externs should be avoided in .c files\n" . $herecurr);
7029 # check for function declarations that have arguments without identifier names
7030 if (defined $stat &&
7031 $stat =~ /^.\s*(?:extern\s+)?$Type\s*(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*\(\s*([^{]+)\s*\)\s*;/s &&
7033 my $args = trim($1);
7034 while ($args =~ m/\s*($Type\s*(?:$Ident|\(\s*\*\s*$Ident?\s*\)\s*$balanced_parens)?)/g) {
7036 if ($arg =~ /^$Type$/ && $arg !~ /enum\s+$Ident$/) {
7037 WARN("FUNCTION_ARGUMENTS",
7038 "function definition argument '$arg' should also have an identifier name\n" . $herecurr);
7043 # check for function definitions
7044 if ($perl_version_ok &&
7046 $stat =~ /^.\s*(?:$Storage\s+)?$Type\s*($Ident)\s*$balanced_parens\s*{/s) {
7047 $context_function = $1;
7049 # check for multiline function definition with misplaced open brace
7051 my $cnt = statement_rawlines($stat);
7052 my $herectx = $here . "\n";
7053 for (my $n = 0; $n < $cnt; $n++) {
7054 my $rl = raw_line($linenr, $n);
7055 $herectx .= $rl . "\n";
7056 $ok = 1 if ($rl =~ /^[ \+]\{/);
7057 $ok = 1 if ($rl =~ /\{/ && $n == 0);
7058 last if $rl =~ /^[ \+].*\{/;
7062 "open brace '{' following function definitions go on the next line\n" . $herectx);
7066 # checks for new __setup's
7067 if ($rawline =~ /\b__setup\("([^"]*)"/) {
7070 if (!grep(/$name/, @setup_docs)) {
7071 CHK("UNDOCUMENTED_SETUP",
7072 "__setup appears un-documented -- check Documentation/admin-guide/kernel-parameters.txt\n" . $herecurr);
7076 # check for pointless casting of alloc functions
7077 if ($line =~ /\*\s*\)\s*$allocFunctions\b/) {
7078 WARN("UNNECESSARY_CASTS",
7079 "unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
7083 # p = alloc(sizeof(struct foo), ...) should be p = alloc(sizeof(*p), ...)
7084 if ($perl_version_ok &&
7085 $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*((?:kv|k|v)[mz]alloc(?:_node)?)\s*\(\s*(sizeof\s*\(\s*struct\s+$Lval\s*\))/) {
7086 CHK("ALLOC_SIZEOF_STRUCT",
7087 "Prefer $3(sizeof(*$1)...) over $3($4...)\n" . $herecurr);
7090 # check for (kv|k)[mz]alloc with multiplies that could be kmalloc_array/kvmalloc_array/kvcalloc/kcalloc
7091 if ($perl_version_ok &&
7093 $stat =~ /^\+\s*($Lval)\s*\=\s*(?:$balanced_parens)?\s*((?:kv|k)[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)\s*,/) {
7097 my $newfunc = "kmalloc_array";
7098 $newfunc = "kvmalloc_array" if ($oldfunc eq "kvmalloc");
7099 $newfunc = "kvcalloc" if ($oldfunc eq "kvzalloc");
7100 $newfunc = "kcalloc" if ($oldfunc eq "kzalloc");
7103 if ($a1 =~ /^sizeof\s*\S/) {
7107 if ($r1 !~ /^sizeof\b/ && $r2 =~ /^sizeof\s*\S/ &&
7108 !($r1 =~ /^$Constant$/ || $r1 =~ /^[A-Z_][A-Z0-9_]*$/)) {
7109 my $cnt = statement_rawlines($stat);
7110 my $herectx = get_stat_here($linenr, $cnt, $here);
7112 if (WARN("ALLOC_WITH_MULTIPLY",
7113 "Prefer $newfunc over $oldfunc with multiply\n" . $herectx) &&
7116 $fixed[$fixlinenr] =~ s/\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*((?:kv|k)[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)/$1 . ' = ' . "$newfunc(" . trim($r1) . ', ' . trim($r2)/e;
7121 # check for krealloc arg reuse
7122 if ($perl_version_ok &&
7123 $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*krealloc\s*\(\s*($Lval)\s*,/ &&
7125 WARN("KREALLOC_ARG_REUSE",
7126 "Reusing the krealloc arg is almost always a bug\n" . $herecurr);
7129 # check for alloc argument mismatch
7130 if ($line =~ /\b((?:devm_)?(?:kcalloc|kmalloc_array))\s*\(\s*sizeof\b/) {
7131 WARN("ALLOC_ARRAY_ARGS",
7132 "$1 uses number as first arg, sizeof is generally wrong\n" . $herecurr);
7135 # check for multiple semicolons
7136 if ($line =~ /;\s*;\s*$/) {
7137 if (WARN("ONE_SEMICOLON",
7138 "Statements terminations use 1 semicolon\n" . $herecurr) &&
7140 $fixed[$fixlinenr] =~ s/(\s*;\s*){2,}$/;/g;
7144 # check for #defines like: 1 << <digit> that could be BIT(digit), it is not exported to uapi
7145 if ($realfile !~ m@^include/uapi/@ &&
7146 $line =~ /#\s*define\s+\w+\s+\(?\s*1\s*([ulUL]*)\s*\<\<\s*(?:\d+|$Ident)\s*\)?/) {
7148 $ull = "_ULL" if (defined($1) && $1 =~ /ll/i);
7149 if (CHK("BIT_MACRO",
7150 "Prefer using the BIT$ull macro\n" . $herecurr) &&
7152 $fixed[$fixlinenr] =~ s/\(?\s*1\s*[ulUL]*\s*<<\s*(\d+|$Ident)\s*\)?/BIT${ull}($1)/;
7156 # check for IS_ENABLED() without CONFIG_<FOO> ($rawline for comments too)
7157 if ($rawline =~ /\bIS_ENABLED\s*\(\s*(\w+)\s*\)/ && $1 !~ /^${CONFIG_}/) {
7158 WARN("IS_ENABLED_CONFIG",
7159 "IS_ENABLED($1) is normally used as IS_ENABLED(${CONFIG_}$1)\n" . $herecurr);
7162 # check for #if defined CONFIG_<FOO> || defined CONFIG_<FOO>_MODULE
7163 if ($line =~ /^\+\s*#\s*if\s+defined(?:\s*\(?\s*|\s+)(${CONFIG_}[A-Z_]+)\s*\)?\s*\|\|\s*defined(?:\s*\(?\s*|\s+)\1_MODULE\s*\)?\s*$/) {
7165 if (WARN("PREFER_IS_ENABLED",
7166 "Prefer IS_ENABLED(<FOO>) to ${CONFIG_}<FOO> || ${CONFIG_}<FOO>_MODULE\n" . $herecurr) &&
7168 $fixed[$fixlinenr] = "\+#if IS_ENABLED($config)";
7172 # check for /* fallthrough */ like comment, prefer fallthrough;
7173 my @fallthroughs = (
7176 'lint -fallthrough[ \t]*',
7177 'intentional(?:ly)?[ \t]*fall(?:(?:s | |-)[Tt]|t)hr(?:ough|u|ew)',
7178 '(?:else,?\s*)?FALL(?:S | |-)?THR(?:OUGH|U|EW)[ \t.!]*(?:-[^\n\r]*)?',
7179 'Fall(?:(?:s | |-)[Tt]|t)hr(?:ough|u|ew)[ \t.!]*(?:-[^\n\r]*)?',
7180 'fall(?:s | |-)?thr(?:ough|u|ew)[ \t.!]*(?:-[^\n\r]*)?',
7182 if ($raw_comment ne '') {
7183 foreach my $ft (@fallthroughs) {
7184 if ($raw_comment =~ /$ft/) {
7185 my $msg_level = \&WARN;
7186 $msg_level = \&CHK if ($file);
7187 &{$msg_level}("PREFER_FALLTHROUGH",
7188 "Prefer 'fallthrough;' over fallthrough comment\n" . $herecurr);
7194 # check for switch/default statements without a break;
7195 if ($perl_version_ok &&
7197 $stat =~ /^\+[$;\s]*(?:case[$;\s]+\w+[$;\s]*:[$;\s]*|)*[$;\s]*\bdefault[$;\s]*:[$;\s]*;/g) {
7198 my $cnt = statement_rawlines($stat);
7199 my $herectx = get_stat_here($linenr, $cnt, $here);
7201 WARN("DEFAULT_NO_BREAK",
7202 "switch default: should use break\n" . $herectx);
7205 # check for gcc specific __FUNCTION__
7206 if ($line =~ /\b__FUNCTION__\b/) {
7207 if (WARN("USE_FUNC",
7208 "__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr) &&
7210 $fixed[$fixlinenr] =~ s/\b__FUNCTION__\b/__func__/g;
7214 # check for uses of __DATE__, __TIME__, __TIMESTAMP__
7215 while ($line =~ /\b(__(?:DATE|TIME|TIMESTAMP)__)\b/g) {
7217 "Use of the '$1' macro makes the build non-deterministic\n" . $herecurr);
7220 # check for use of yield()
7221 if ($line =~ /\byield\s*\(\s*\)/) {
7223 "Using yield() is generally wrong. See yield() kernel-doc (sched/core.c)\n" . $herecurr);
7226 # check for comparisons against true and false
7227 if ($line =~ /\+\s*(.*?)\b(true|false|$Lval)\s*(==|\!=)\s*(true|false|$Lval)\b(.*)$/i) {
7235 ($arg, $otype) = ($otype, $arg) if ($arg =~ /^(?:true|false)$/i);
7237 my $type = lc($otype);
7238 if ($type =~ /^(?:true|false)$/) {
7239 if (("$test" eq "==" && "$type" eq "true") ||
7240 ("$test" eq "!=" && "$type" eq "false")) {
7244 CHK("BOOL_COMPARISON",
7245 "Using comparison to $otype is error prone\n" . $herecurr);
7247 ## maybe suggesting a correct construct would better
7248 ## "Using comparison to $otype is error prone. Perhaps use '${lead}${op}${arg}${trail}'\n" . $herecurr);
7253 # check for semaphores initialized locked
7254 if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) {
7255 WARN("CONSIDER_COMPLETION",
7256 "consider using a completion\n" . $herecurr);
7259 # recommend kstrto* over simple_strto* and strict_strto*
7260 if ($line =~ /\b((simple|strict)_(strto(l|ll|ul|ull)))\s*\(/) {
7261 WARN("CONSIDER_KSTRTO",
7262 "$1 is obsolete, use k$3 instead\n" . $herecurr);
7265 # check for __initcall(), use device_initcall() explicitly or more appropriate function please
7266 if ($line =~ /^.\s*__initcall\s*\(/) {
7267 WARN("USE_DEVICE_INITCALL",
7268 "please use device_initcall() or more appropriate function instead of __initcall() (see include/linux/init.h)\n" . $herecurr);
7271 # check for spin_is_locked(), suggest lockdep instead
7272 if ($line =~ /\bspin_is_locked\(/) {
7274 "Where possible, use lockdep_assert_held instead of assertions based on spin_is_locked\n" . $herecurr);
7277 # check for deprecated apis
7278 if ($line =~ /\b($deprecated_apis_search)\b\s*\(/) {
7279 my $deprecated_api = $1;
7280 my $new_api = $deprecated_apis{$deprecated_api};
7281 WARN("DEPRECATED_API",
7282 "Deprecated use of '$deprecated_api', prefer '$new_api' instead\n" . $herecurr);
7285 # check for various structs that are normally const (ops, kgdb, device_tree)
7286 # and avoid what seem like struct definitions 'struct foo {'
7287 if (defined($const_structs) &&
7288 $line !~ /\bconst\b/ &&
7289 $line =~ /\bstruct\s+($const_structs)\b(?!\s*\{)/) {
7290 WARN("CONST_STRUCT",
7291 "struct $1 should normally be const\n" . $herecurr);
7294 # use of NR_CPUS is usually wrong
7295 # ignore definitions of NR_CPUS and usage to define arrays as likely right
7296 # ignore designated initializers using NR_CPUS
7297 if ($line =~ /\bNR_CPUS\b/ &&
7298 $line !~ /^.\s*\s*#\s*if\b.*\bNR_CPUS\b/ &&
7299 $line !~ /^.\s*\s*#\s*define\b.*\bNR_CPUS\b/ &&
7300 $line !~ /^.\s*$Declare\s.*\[[^\]]*NR_CPUS[^\]]*\]/ &&
7301 $line !~ /\[[^\]]*\.\.\.[^\]]*NR_CPUS[^\]]*\]/ &&
7302 $line !~ /\[[^\]]*NR_CPUS[^\]]*\.\.\.[^\]]*\]/ &&
7303 $line !~ /^.\s*\.\w+\s*=\s*.*\bNR_CPUS\b/)
7306 "usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc\n" . $herecurr);
7309 # Use of __ARCH_HAS_<FOO> or ARCH_HAVE_<BAR> is wrong.
7310 if ($line =~ /\+\s*#\s*define\s+((?:__)?ARCH_(?:HAS|HAVE)\w*)\b/) {
7311 ERROR("DEFINE_ARCH_HAS",
7312 "#define of '$1' is wrong - use Kconfig variables or standard guards instead\n" . $herecurr);
7315 # likely/unlikely comparisons similar to "(likely(foo) > 0)"
7316 if ($perl_version_ok &&
7317 $line =~ /\b((?:un)?likely)\s*\(\s*$FuncArg\s*\)\s*$Compare/) {
7318 WARN("LIKELY_MISUSE",
7319 "Using $1 should generally have parentheses around the comparison\n" . $herecurr);
7322 # return sysfs_emit(foo, fmt, ...) fmt without newline
7323 if ($line =~ /\breturn\s+sysfs_emit\s*\(\s*$FuncArg\s*,\s*($String)/ &&
7324 substr($rawline, $-[6], $+[6] - $-[6]) !~ /\\n"$/) {
7325 my $offset = $+[6] - 1;
7326 if (WARN("SYSFS_EMIT",
7327 "return sysfs_emit(...) formats should include a terminating newline\n" . $herecurr) &&
7329 substr($fixed[$fixlinenr], $offset, 0) = '\\n';
7333 # nested likely/unlikely calls
7334 if ($line =~ /\b(?:(?:un)?likely)\s*\(\s*!?\s*(IS_ERR(?:_OR_NULL|_VALUE)?|WARN)/) {
7335 WARN("LIKELY_MISUSE",
7336 "nested (un)?likely() calls, $1 already uses unlikely() internally\n" . $herecurr);
7339 # whine mightly about in_atomic
7340 if ($line =~ /\bin_atomic\s*\(/) {
7341 if ($realfile =~ m@^drivers/@) {
7343 "do not use in_atomic in drivers\n" . $herecurr);
7344 } elsif ($realfile !~ m@^kernel/@) {
7346 "use of in_atomic() is incorrect outside core kernel code\n" . $herecurr);
7350 # check for lockdep_set_novalidate_class
7351 if ($line =~ /^.\s*lockdep_set_novalidate_class\s*\(/ ||
7352 $line =~ /__lockdep_no_validate__\s*\)/ ) {
7353 if ($realfile !~ m@^kernel/lockdep@ &&
7354 $realfile !~ m@^include/linux/lockdep@ &&
7355 $realfile !~ m@^drivers/base/core@) {
7357 "lockdep_no_validate class is reserved for device->mutex.\n" . $herecurr);
7361 if ($line =~ /debugfs_create_\w+.*\b$mode_perms_world_writable\b/ ||
7362 $line =~ /DEVICE_ATTR.*\b$mode_perms_world_writable\b/) {
7363 WARN("EXPORTED_WORLD_WRITABLE",
7364 "Exporting world writable files is usually an error. Consider more restrictive permissions.\n" . $herecurr);
7367 # check for DEVICE_ATTR uses that could be DEVICE_ATTR_<FOO>
7368 # and whether or not function naming is typical and if
7369 # DEVICE_ATTR permissions uses are unusual too
7370 if ($perl_version_ok &&
7372 $stat =~ /\bDEVICE_ATTR\s*\(\s*(\w+)\s*,\s*\(?\s*(\s*(?:${multi_mode_perms_string_search}|0[0-7]{3,3})\s*)\s*\)?\s*,\s*(\w+)\s*,\s*(\w+)\s*\)/) {
7377 my $octal_perms = perms_to_octal($perms);
7378 if ($show =~ /^${var}_show$/ &&
7379 $store =~ /^${var}_store$/ &&
7380 $octal_perms eq "0644") {
7381 if (WARN("DEVICE_ATTR_RW",
7382 "Use DEVICE_ATTR_RW\n" . $herecurr) &&
7384 $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*$store\s*\)/DEVICE_ATTR_RW(${var})/;
7386 } elsif ($show =~ /^${var}_show$/ &&
7387 $store =~ /^NULL$/ &&
7388 $octal_perms eq "0444") {
7389 if (WARN("DEVICE_ATTR_RO",
7390 "Use DEVICE_ATTR_RO\n" . $herecurr) &&
7392 $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*NULL\s*\)/DEVICE_ATTR_RO(${var})/;
7394 } elsif ($show =~ /^NULL$/ &&
7395 $store =~ /^${var}_store$/ &&
7396 $octal_perms eq "0200") {
7397 if (WARN("DEVICE_ATTR_WO",
7398 "Use DEVICE_ATTR_WO\n" . $herecurr) &&
7400 $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*NULL\s*,\s*$store\s*\)/DEVICE_ATTR_WO(${var})/;
7402 } elsif ($octal_perms eq "0644" ||
7403 $octal_perms eq "0444" ||
7404 $octal_perms eq "0200") {
7405 my $newshow = "$show";
7406 $newshow = "${var}_show" if ($show ne "NULL" && $show ne "${var}_show");
7407 my $newstore = $store;
7408 $newstore = "${var}_store" if ($store ne "NULL" && $store ne "${var}_store");
7410 if ($show ne $newshow) {
7411 $rename .= " '$show' to '$newshow'";
7413 if ($store ne $newstore) {
7414 $rename .= " '$store' to '$newstore'";
7416 WARN("DEVICE_ATTR_FUNCTIONS",
7417 "Consider renaming function(s)$rename\n" . $herecurr);
7419 WARN("DEVICE_ATTR_PERMS",
7420 "DEVICE_ATTR unusual permissions '$perms' used\n" . $herecurr);
7424 # Mode permission misuses where it seems decimal should be octal
7425 # This uses a shortcut match to avoid unnecessary uses of a slow foreach loop
7426 # o Ignore module_param*(...) uses with a decimal 0 permission as that has a
7427 # specific definition of not visible in sysfs.
7428 # o Ignore proc_create*(...) uses with a decimal 0 permission as that means
7429 # use the default permissions
7430 if ($perl_version_ok &&
7432 $line =~ /$mode_perms_search/) {
7433 foreach my $entry (@mode_permission_funcs) {
7434 my $func = $entry->[0];
7435 my $arg_pos = $entry->[1];
7437 my $lc = $stat =~ tr@\n@@;
7438 $lc = $lc + $linenr;
7439 my $stat_real = get_stat_real($linenr, $lc);
7444 $skip_args = "(?:\\s*$FuncArg\\s*,\\s*){$arg_pos,$arg_pos}";
7446 my $test = "\\b$func\\s*\\(${skip_args}($FuncArg(?:\\|\\s*$FuncArg)*)\\s*[,\\)]";
7447 if ($stat =~ /$test/) {
7449 $val = $6 if ($skip_args ne "");
7450 if (!($func =~ /^(?:module_param|proc_create)/ && $val eq "0") &&
7451 (($val =~ /^$Int$/ && $val !~ /^$Octal$/) ||
7452 ($val =~ /^$Octal$/ && length($val) ne 4))) {
7453 ERROR("NON_OCTAL_PERMISSIONS",
7454 "Use 4 digit octal (0777) not decimal permissions\n" . "$here\n" . $stat_real);
7456 if ($val =~ /^$Octal$/ && (oct($val) & 02)) {
7457 ERROR("EXPORTED_WORLD_WRITABLE",
7458 "Exporting writable files is usually an error. Consider more restrictive permissions.\n" . "$here\n" . $stat_real);
7464 # check for uses of S_<PERMS> that could be octal for readability
7465 while ($line =~ m{\b($multi_mode_perms_string_search)\b}g) {
7467 my $octal = perms_to_octal($oval);
7468 if (WARN("SYMBOLIC_PERMS",
7469 "Symbolic permissions '$oval' are not preferred. Consider using octal permissions '$octal'.\n" . $herecurr) &&
7471 $fixed[$fixlinenr] =~ s/\Q$oval\E/$octal/;
7475 # validate content of MODULE_LICENSE against list from include/linux/module.h
7476 if ($line =~ /\bMODULE_LICENSE\s*\(\s*($String)\s*\)/) {
7477 my $extracted_string = get_quoted_string($line, $rawline);
7478 my $valid_licenses = qr{
7481 GPL\ and\ additional\ rights|
7487 if ($extracted_string !~ /^"(?:$valid_licenses)"$/x) {
7488 WARN("MODULE_LICENSE",
7489 "unknown module license " . $extracted_string . "\n" . $herecurr);
7491 if (!$file && $extracted_string eq '"GPL v2"') {
7492 if (WARN("MODULE_LICENSE",
7493 "Prefer \"GPL\" over \"GPL v2\" - see commit bf7fbeeae6db (\"module: Cure the MODULE_LICENSE \"GPL\" vs. \"GPL v2\" bogosity\")\n" . $herecurr) &&
7495 $fixed[$fixlinenr] =~ s/\bMODULE_LICENSE\s*\(\s*"GPL v2"\s*\)/MODULE_LICENSE("GPL")/;
7500 # check for sysctl duplicate constants
7501 if ($line =~ /\.extra[12]\s*=\s*&(zero|one|int_max)\b/) {
7502 WARN("DUPLICATED_SYSCTL_CONST",
7503 "duplicated sysctl range checking value '$1', consider using the shared one in include/linux/sysctl.h\n" . $herecurr);
7507 # If we have no input at all, then there is nothing to report on
7508 # so just keep quiet.
7509 if ($#rawlines == -1) {
7513 # In mailback mode only produce a report in the negative, for
7514 # things that appear to be patches.
7515 if ($mailback && ($clean == 1 || !$is_patch)) {
7519 # This is not a patch, and we are in 'no-patch' mode so
7521 if (!$chk_patch && !$is_patch) {
7525 if (!$is_patch && $filename !~ /cover-letter\.patch$/) {
7526 ERROR("NOT_UNIFIED_DIFF",
7527 "Does not appear to be a unified-diff format patch\n");
7529 if ($is_patch && $has_commit_log && $chk_signoff) {
7530 if ($signoff == 0) {
7531 ERROR("MISSING_SIGN_OFF",
7532 "Missing Signed-off-by: line(s)\n");
7533 } elsif ($authorsignoff != 1) {
7534 # authorsignoff values:
7535 # 0 -> missing sign off
7536 # 1 -> sign off identical
7537 # 2 -> names and addresses match, comments mismatch
7538 # 3 -> addresses match, names different
7539 # 4 -> names match, addresses different
7540 # 5 -> names match, addresses excluding subaddress details (refer RFC 5233) match
7542 my $sob_msg = "'From: $author' != 'Signed-off-by: $author_sob'";
7544 if ($authorsignoff == 0) {
7545 ERROR("NO_AUTHOR_SIGN_OFF",
7546 "Missing Signed-off-by: line by nominal patch author '$author'\n");
7547 } elsif ($authorsignoff == 2) {
7548 CHK("FROM_SIGN_OFF_MISMATCH",
7549 "From:/Signed-off-by: email comments mismatch: $sob_msg\n");
7550 } elsif ($authorsignoff == 3) {
7551 WARN("FROM_SIGN_OFF_MISMATCH",
7552 "From:/Signed-off-by: email name mismatch: $sob_msg\n");
7553 } elsif ($authorsignoff == 4) {
7554 WARN("FROM_SIGN_OFF_MISMATCH",
7555 "From:/Signed-off-by: email address mismatch: $sob_msg\n");
7556 } elsif ($authorsignoff == 5) {
7557 WARN("FROM_SIGN_OFF_MISMATCH",
7558 "From:/Signed-off-by: email subaddress mismatch: $sob_msg\n");
7563 print report_dump();
7564 if ($summary && !($clean == 1 && $quiet == 1)) {
7565 print "$filename " if ($summary_file);
7566 print "total: $cnt_error errors, $cnt_warn warnings, " .
7567 (($check)? "$cnt_chk checks, " : "") .
7568 "$cnt_lines lines checked\n";
7572 # If there were any defects found and not already fixing them
7573 if (!$clean and !$fix) {
7576 NOTE: For some of the reported defects, checkpatch may be able to
7577 mechanically convert to the typical style using --fix or --fix-inplace.
7580 # If there were whitespace errors which cleanpatch can fix
7581 # then suggest that.
7582 if ($rpt_cleaners) {
7586 NOTE: Whitespace errors detected.
7587 You may wish to use scripts/cleanpatch or scripts/cleanfile
7592 if ($clean == 0 && $fix &&
7593 ("@rawlines" ne "@fixed" ||
7594 $#fixed_inserted >= 0 || $#fixed_deleted >= 0)) {
7595 my $newfile = $filename;
7596 $newfile .= ".EXPERIMENTAL-checkpatch-fixes" if (!$fix_inplace);
7600 @fixed = fix_inserted_deleted_lines(\@fixed, \@fixed_inserted, \@fixed_deleted);
7602 open($f, '>', $newfile)
7603 or die "$P: Can't open $newfile for write\n";
7604 foreach my $fixed_line (@fixed) {
7607 if ($linecount > 3) {
7608 $fixed_line =~ s/^\+//;
7609 print $f $fixed_line . "\n";
7612 print $f $fixed_line . "\n";
7620 Wrote EXPERIMENTAL --fix correction(s) to '$newfile'
7622 Do _NOT_ trust the results written to this file.
7623 Do _NOT_ submit these changes without inspecting them for correctness.
7625 This EXPERIMENTAL file is simply a convenience to help rewrite patches.
7626 No warranties, expressed or implied...
7634 print "$vname has no obvious style problems and is ready for submission.\n";
7636 print "$vname has style problems, please review.\n";