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 return 1 if (!$tree || which("python3") eq "" || !(-x "$root/scripts/spdxcheck.py") || !(-e "$gitroot"));
1137 my $root_path = abs_path($root);
1138 my $status = `cd "$root_path"; echo "$license" | scripts/spdxcheck.py -`;
1139 return 0 if ($status ne "");
1143 my $camelcase_seeded = 0;
1144 sub seed_camelcase_includes {
1145 return if ($camelcase_seeded);
1148 my $camelcase_cache = "";
1149 my @include_files = ();
1151 $camelcase_seeded = 1;
1153 if (-e "$gitroot") {
1154 my $git_last_include_commit = `${git_command} log --no-merges --pretty=format:"%h%n" -1 -- include`;
1155 chomp $git_last_include_commit;
1156 $camelcase_cache = ".checkpatch-camelcase.git.$git_last_include_commit";
1158 my $last_mod_date = 0;
1159 $files = `find $root/include -name "*.h"`;
1160 @include_files = split('\n', $files);
1161 foreach my $file (@include_files) {
1162 my $date = POSIX::strftime("%Y%m%d%H%M",
1163 localtime((stat $file)[9]));
1164 $last_mod_date = $date if ($last_mod_date < $date);
1166 $camelcase_cache = ".checkpatch-camelcase.date.$last_mod_date";
1169 if ($camelcase_cache ne "" && -f $camelcase_cache) {
1170 open(my $camelcase_file, '<', "$camelcase_cache")
1171 or warn "$P: Can't read '$camelcase_cache' $!\n";
1172 while (<$camelcase_file>) {
1176 close($camelcase_file);
1181 if (-e "$gitroot") {
1182 $files = `${git_command} ls-files "include/*.h"`;
1183 @include_files = split('\n', $files);
1186 foreach my $file (@include_files) {
1187 seed_camelcase_file($file);
1190 if ($camelcase_cache ne "") {
1191 unlink glob ".checkpatch-camelcase.*";
1192 open(my $camelcase_file, '>', "$camelcase_cache")
1193 or warn "$P: Can't write '$camelcase_cache' $!\n";
1194 foreach (sort { lc($a) cmp lc($b) } keys(%camelcase)) {
1195 print $camelcase_file ("$_\n");
1197 close($camelcase_file);
1201 sub git_is_single_file {
1202 my ($filename) = @_;
1204 return 0 if ((which("git") eq "") || !(-e "$gitroot"));
1206 my $output = `${git_command} ls-files -- $filename 2>/dev/null`;
1207 my $count = $output =~ tr/\n//;
1208 return $count eq 1 && $output =~ m{^${filename}$};
1211 sub git_commit_info {
1212 my ($commit, $id, $desc) = @_;
1214 return ($id, $desc) if ((which("git") eq "") || !(-e "$gitroot"));
1216 my $output = `${git_command} log --no-color --format='%H %s' -1 $commit 2>&1`;
1217 $output =~ s/^\s*//gm;
1218 my @lines = split("\n", $output);
1220 return ($id, $desc) if ($#lines < 0);
1222 if ($lines[0] =~ /^error: short SHA1 $commit is ambiguous/) {
1223 # Maybe one day convert this block of bash into something that returns
1224 # all matching commit ids, but it's very slow...
1226 # echo "checking commits $1..."
1227 # git rev-list --remotes | grep -i "^$1" |
1228 # while read line ; do
1229 # git log --format='%H %s' -1 $line |
1230 # echo "commit $(cut -c 1-12,41-)"
1232 } elsif ($lines[0] =~ /^fatal: ambiguous argument '$commit': unknown revision or path not in the working tree\./ ||
1233 $lines[0] =~ /^fatal: bad object $commit/) {
1236 $id = substr($lines[0], 0, 12);
1237 $desc = substr($lines[0], 41);
1240 return ($id, $desc);
1243 $chk_signoff = 0 if ($file);
1248 my @fixed_inserted = ();
1249 my @fixed_deleted = ();
1252 # If input is git commits, extract all commits from the commit expressions.
1253 # For example, HEAD-3 means we need check 'HEAD, HEAD~1, HEAD~2'.
1254 die "$P: No git repository found\n" if ($git && !-e "$gitroot");
1258 foreach my $commit_expr (@ARGV) {
1260 if ($commit_expr =~ m/^(.*)-(\d+)$/) {
1261 $git_range = "-$2 $1";
1262 } elsif ($commit_expr =~ m/\.\./) {
1263 $git_range = "$commit_expr";
1265 $git_range = "-1 $commit_expr";
1267 my $lines = `${git_command} log --no-color --no-merges --pretty=format:'%H %s' $git_range`;
1268 foreach my $line (split(/\n/, $lines)) {
1269 $line =~ /^([0-9a-fA-F]{40,40}) (.*)$/;
1270 next if (!defined($1) || !defined($2));
1273 unshift(@commits, $sha1);
1274 $git_commits{$sha1} = $subject;
1277 die "$P: no git commits after extraction!\n" if (@commits == 0);
1282 $allow_c99_comments = !defined $ignore_type{"C99_COMMENT_TOLERANCE"};
1283 for my $filename (@ARGV) {
1285 my $is_git_file = git_is_single_file($filename);
1286 my $oldfile = $file;
1287 $file = 1 if ($is_git_file);
1289 open($FILE, '-|', "git format-patch -M --stdout -1 $filename") ||
1290 die "$P: $filename: git format-patch failed - $!\n";
1292 open($FILE, '-|', "diff -u /dev/null $filename") ||
1293 die "$P: $filename: diff failed - $!\n";
1294 } elsif ($filename eq '-') {
1295 open($FILE, '<&STDIN');
1297 open($FILE, '<', "$filename") ||
1298 die "$P: $filename: open failed - $!\n";
1300 if ($filename eq '-') {
1301 $vname = 'Your patch';
1303 $vname = "Commit " . substr($filename, 0, 12) . ' ("' . $git_commits{$filename} . '")';
1309 push(@rawlines, $_);
1310 $vname = qq("$1") if ($filename eq '-' && $_ =~ m/^Subject:\s+(.+)/i);
1314 if ($#ARGV > 0 && $quiet == 0) {
1315 print '-' x length($vname) . "\n";
1317 print '-' x length($vname) . "\n";
1320 if (!process($filename)) {
1326 @fixed_inserted = ();
1327 @fixed_deleted = ();
1329 @modifierListFile = ();
1332 $file = $oldfile if ($is_git_file);
1336 hash_show_words(\%use_type, "Used");
1337 hash_show_words(\%ignore_type, "Ignored");
1339 if (!$perl_version_ok) {
1342 NOTE: perl $^V is not modern enough to detect all possible issues.
1343 An upgrade to at least perl $minimum_perl_version is suggested.
1350 NOTE: If any of the errors are false positives, please report
1351 them to the maintainer, see CHECKPATCH in MAINTAINERS.
1354 # OpenOCD specific: Begin
1357 NOTE: If any of the errors are false positives, please report
1358 them to the openocd-devel mailing list or prepare a patch
1359 and send it to Gerrit for review.
1361 # OpenOCD specific: End
1367 sub top_of_kernel_tree {
1372 "COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile",
1373 "README", "Documentation", "arch", "include", "drivers",
1374 "fs", "init", "ipc", "kernel", "lib", "scripts",
1377 # OpenOCD specific: Begin
1379 "AUTHORS", "BUGS", "COPYING", "HACKING", "Makefile.am",
1380 "README", "contrib", "doc", "src", "tcl", "testing", "tools",
1382 # OpenOCD specific: End
1384 foreach my $check (@tree_check) {
1385 if (! -e $root . '/' . $check) {
1393 my ($formatted_email) = @_;
1397 my $name_comment = "";
1401 if ($formatted_email =~ /^(.*)<(\S+\@\S+)>(.*)$/) {
1404 $comment = $3 if defined $3;
1405 } elsif ($formatted_email =~ /^\s*<(\S+\@\S+)>(.*)$/) {
1407 $comment = $2 if defined $2;
1408 } elsif ($formatted_email =~ /(\S+\@\S+)(.*)$/) {
1410 $comment = $2 if defined $2;
1411 $formatted_email =~ s/\Q$address\E.*$//;
1412 $name = $formatted_email;
1413 $name = trim($name);
1414 $name =~ s/^\"|\"$//g;
1415 # If there's a name left after stripping spaces and
1416 # leading quotes, and the address doesn't have both
1417 # leading and trailing angle brackets, the address
1419 # "joe smith joe@smith.com" bad
1420 # "joe smith <joe@smith.com" bad
1421 if ($name ne "" && $address !~ /^<[^>]+>$/) {
1426 # OpenOCD specific: Begin: handle jenkins as valid email
1427 } elsif ($formatted_email eq "jenkins") {
1428 $address = "jenkins";
1429 # OpenOCD specific: End
1432 # Extract comments from names excluding quoted parts
1433 # "John D. (Doe)" - Do not extract
1434 if ($name =~ s/\"(.+)\"//) {
1437 while ($name =~ s/\s*($balanced_parens)\s*/ /) {
1438 $name_comment .= trim($1);
1440 $name =~ s/^[ \"]+|[ \"]+$//g;
1441 $name = trim("$quoted $name");
1443 $address = trim($address);
1444 $address =~ s/^\<|\>$//g;
1445 $comment = trim($comment);
1447 if ($name =~ /[^\w \-]/i) { ##has "must quote" chars
1448 $name =~ s/(?<!\\)"/\\"/g; ##escape quotes
1449 $name = "\"$name\"";
1452 return ($name, $name_comment, $address, $comment);
1456 my ($name, $name_comment, $address, $comment) = @_;
1458 my $formatted_email;
1460 $name =~ s/^[ \"]+|[ \"]+$//g;
1461 $address = trim($address);
1462 $address =~ s/(?:\.|\,|\")+$//; ##trailing commas, dots or quotes
1464 if ($name =~ /[^\w \-]/i) { ##has "must quote" chars
1465 $name =~ s/(?<!\\)"/\\"/g; ##escape quotes
1466 $name = "\"$name\"";
1469 $name_comment = trim($name_comment);
1470 $name_comment = " $name_comment" if ($name_comment ne "");
1471 $comment = trim($comment);
1472 $comment = " $comment" if ($comment ne "");
1474 if ("$name" eq "") {
1475 $formatted_email = "$address";
1477 $formatted_email = "$name$name_comment <$address>";
1479 $formatted_email .= "$comment";
1480 return $formatted_email;
1483 sub reformat_email {
1486 my ($email_name, $name_comment, $email_address, $comment) = parse_email($email);
1487 return format_email($email_name, $name_comment, $email_address, $comment);
1490 sub same_email_addresses {
1491 my ($email1, $email2) = @_;
1493 my ($email1_name, $name1_comment, $email1_address, $comment1) = parse_email($email1);
1494 my ($email2_name, $name2_comment, $email2_address, $comment2) = parse_email($email2);
1496 return $email1_name eq $email2_name &&
1497 $email1_address eq $email2_address &&
1498 $name1_comment eq $name2_comment &&
1499 $comment1 eq $comment2;
1505 foreach my $path (split(/:/, $ENV{PATH})) {
1506 if (-e "$path/$bin") {
1507 return "$path/$bin";
1517 foreach my $path (split(/:/, ".:$ENV{HOME}:.scripts")) {
1518 if (-e "$path/$conf") {
1519 return "$path/$conf";
1531 for my $c (split(//, $str)) {
1535 for (; ($n % $tabsize) != 0; $n++) {
1547 (my $res = shift) =~ tr/\t/ /c;
1554 # Drop the diff line leader and expand tabs
1556 $line = expand_tabs($line);
1558 # Pick the indent from the front of the line.
1559 my ($white) = ($line =~ /^(\s*)/);
1561 return (length($line), length($white));
1564 my $sanitise_quote = '';
1566 sub sanitise_line_reset {
1567 my ($in_comment) = @_;
1570 $sanitise_quote = '*/';
1572 $sanitise_quote = '';
1585 # Always copy over the diff marker.
1586 $res = substr($line, 0, 1);
1588 for ($off = 1; $off < length($line); $off++) {
1589 $c = substr($line, $off, 1);
1591 # Comments we are whacking completely including the begin
1592 # and end, all to $;.
1593 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '/*') {
1594 $sanitise_quote = '*/';
1596 substr($res, $off, 2, "$;$;");
1600 if ($sanitise_quote eq '*/' && substr($line, $off, 2) eq '*/') {
1601 $sanitise_quote = '';
1602 substr($res, $off, 2, "$;$;");
1606 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '//') {
1607 $sanitise_quote = '//';
1609 substr($res, $off, 2, $sanitise_quote);
1614 # A \ in a string means ignore the next character.
1615 if (($sanitise_quote eq "'" || $sanitise_quote eq '"') &&
1617 substr($res, $off, 2, 'XX');
1622 if ($c eq "'" || $c eq '"') {
1623 if ($sanitise_quote eq '') {
1624 $sanitise_quote = $c;
1626 substr($res, $off, 1, $c);
1628 } elsif ($sanitise_quote eq $c) {
1629 $sanitise_quote = '';
1633 #print "c<$c> SQ<$sanitise_quote>\n";
1634 if ($off != 0 && $sanitise_quote eq '*/' && $c ne "\t") {
1635 substr($res, $off, 1, $;);
1636 } elsif ($off != 0 && $sanitise_quote eq '//' && $c ne "\t") {
1637 substr($res, $off, 1, $;);
1638 } elsif ($off != 0 && $sanitise_quote && $c ne "\t") {
1639 substr($res, $off, 1, 'X');
1641 substr($res, $off, 1, $c);
1645 if ($sanitise_quote eq '//') {
1646 $sanitise_quote = '';
1649 # The pathname on a #include may be surrounded by '<' and '>'.
1650 if ($res =~ /^.\s*\#\s*include\s+\<(.*)\>/) {
1651 my $clean = 'X' x length($1);
1652 $res =~ s@\<.*\>@<$clean>@;
1654 # The whole of a #error is a string.
1655 } elsif ($res =~ /^.\s*\#\s*(?:error|warning)\s+(.*)\b/) {
1656 my $clean = 'X' x length($1);
1657 $res =~ s@(\#\s*(?:error|warning)\s+).*@$1$clean@;
1660 if ($allow_c99_comments && $res =~ m@(//.*$)@) {
1662 $res =~ s/\Q$match\E/"$;" x length($match)/e;
1668 sub get_quoted_string {
1669 my ($line, $rawline) = @_;
1671 return "" if (!defined($line) || !defined($rawline));
1672 return "" if ($line !~ m/($String)/g);
1673 return substr($rawline, $-[0], $+[0] - $-[0]);
1676 sub ctx_statement_block {
1677 my ($linenr, $remain, $off) = @_;
1678 my $line = $linenr - 1;
1681 my $coff = $off - 1;
1695 @stack = (['', 0]) if ($#stack == -1);
1697 #warn "CSB: blk<$blk> remain<$remain>\n";
1698 # If we are about to drop off the end, pull in more
1701 for (; $remain > 0; $line++) {
1702 last if (!defined $lines[$line]);
1703 next if ($lines[$line] =~ /^-/);
1706 $blk .= $lines[$line] . "\n";
1707 $len = length($blk);
1711 # Bail if there is no further context.
1712 #warn "CSB: blk<$blk> off<$off> len<$len>\n";
1716 if ($level == 0 && substr($blk, $off) =~ /^.\s*#\s*define/) {
1722 $c = substr($blk, $off, 1);
1723 $remainder = substr($blk, $off);
1725 #warn "CSB: c<$c> type<$type> level<$level> remainder<$remainder> coff_set<$coff_set>\n";
1727 # Handle nested #if/#else.
1728 if ($remainder =~ /^#\s*(?:ifndef|ifdef|if)\s/) {
1729 push(@stack, [ $type, $level ]);
1730 } elsif ($remainder =~ /^#\s*(?:else|elif)\b/) {
1731 ($type, $level) = @{$stack[$#stack - 1]};
1732 } elsif ($remainder =~ /^#\s*endif\b/) {
1733 ($type, $level) = @{pop(@stack)};
1736 # Statement ends at the ';' or a close '}' at the
1738 if ($level == 0 && $c eq ';') {
1742 # An else is really a conditional as long as its not else if
1743 if ($level == 0 && $coff_set == 0 &&
1744 (!defined($p) || $p =~ /(?:\s|\}|\+)/) &&
1745 $remainder =~ /^(else)(?:\s|{)/ &&
1746 $remainder !~ /^else\s+if\b/) {
1747 $coff = $off + length($1) - 1;
1749 #warn "CSB: mark coff<$coff> soff<$soff> 1<$1>\n";
1750 #warn "[" . substr($blk, $soff, $coff - $soff + 1) . "]\n";
1753 if (($type eq '' || $type eq '(') && $c eq '(') {
1757 if ($type eq '(' && $c eq ')') {
1759 $type = ($level != 0)? '(' : '';
1761 if ($level == 0 && $coff < $soff) {
1764 #warn "CSB: mark coff<$coff>\n";
1767 if (($type eq '' || $type eq '{') && $c eq '{') {
1771 if ($type eq '{' && $c eq '}') {
1773 $type = ($level != 0)? '{' : '';
1776 if (substr($blk, $off + 1, 1) eq ';') {
1782 # Preprocessor commands end at the newline unless escaped.
1783 if ($type eq '#' && $c eq "\n" && $p ne "\\") {
1791 # We are truly at the end, so shuffle to the next line.
1798 my $statement = substr($blk, $soff, $off - $soff + 1);
1799 my $condition = substr($blk, $soff, $coff - $soff + 1);
1801 #warn "STATEMENT<$statement>\n";
1802 #warn "CONDITION<$condition>\n";
1804 #print "coff<$coff> soff<$off> loff<$loff>\n";
1806 return ($statement, $condition,
1807 $line, $remain + 1, $off - $loff + 1, $level);
1810 sub statement_lines {
1813 # Strip the diff line prefixes and rip blank lines at start and end.
1814 $stmt =~ s/(^|\n)./$1/g;
1818 my @stmt_lines = ($stmt =~ /\n/g);
1820 return $#stmt_lines + 2;
1823 sub statement_rawlines {
1826 my @stmt_lines = ($stmt =~ /\n/g);
1828 return $#stmt_lines + 2;
1831 sub statement_block_size {
1834 $stmt =~ s/(^|\n)./$1/g;
1840 my @stmt_lines = ($stmt =~ /\n/g);
1841 my @stmt_statements = ($stmt =~ /;/g);
1843 my $stmt_lines = $#stmt_lines + 2;
1844 my $stmt_statements = $#stmt_statements + 1;
1846 if ($stmt_lines > $stmt_statements) {
1849 return $stmt_statements;
1853 sub ctx_statement_full {
1854 my ($linenr, $remain, $off) = @_;
1855 my ($statement, $condition, $level);
1859 # Grab the first conditional/block pair.
1860 ($statement, $condition, $linenr, $remain, $off, $level) =
1861 ctx_statement_block($linenr, $remain, $off);
1862 #print "F: c<$condition> s<$statement> remain<$remain>\n";
1863 push(@chunks, [ $condition, $statement ]);
1864 if (!($remain > 0 && $condition =~ /^\s*(?:\n[+-])?\s*(?:if|else|do)\b/s)) {
1865 return ($level, $linenr, @chunks);
1868 # Pull in the following conditional/block pairs and see if they
1869 # could continue the statement.
1871 ($statement, $condition, $linenr, $remain, $off, $level) =
1872 ctx_statement_block($linenr, $remain, $off);
1873 #print "C: c<$condition> s<$statement> remain<$remain>\n";
1874 last if (!($remain > 0 && $condition =~ /^(?:\s*\n[+-])*\s*(?:else|do)\b/s));
1876 push(@chunks, [ $condition, $statement ]);
1879 return ($level, $linenr, @chunks);
1883 my ($linenr, $remain, $outer, $open, $close, $off) = @_;
1885 my $start = $linenr - 1;
1892 my @stack = ($level);
1893 for ($line = $start; $remain > 0; $line++) {
1894 next if ($rawlines[$line] =~ /^-/);
1897 $blk .= $rawlines[$line];
1899 # Handle nested #if/#else.
1900 if ($lines[$line] =~ /^.\s*#\s*(?:ifndef|ifdef|if)\s/) {
1901 push(@stack, $level);
1902 } elsif ($lines[$line] =~ /^.\s*#\s*(?:else|elif)\b/) {
1903 $level = $stack[$#stack - 1];
1904 } elsif ($lines[$line] =~ /^.\s*#\s*endif\b/) {
1905 $level = pop(@stack);
1908 foreach my $c (split(//, $lines[$line])) {
1909 ##print "C<$c>L<$level><$open$close>O<$off>\n";
1915 if ($c eq $close && $level > 0) {
1917 last if ($level == 0);
1918 } elsif ($c eq $open) {
1923 if (!$outer || $level <= 1) {
1924 push(@res, $rawlines[$line]);
1927 last if ($level == 0);
1930 return ($level, @res);
1932 sub ctx_block_outer {
1933 my ($linenr, $remain) = @_;
1935 my ($level, @r) = ctx_block_get($linenr, $remain, 1, '{', '}', 0);
1939 my ($linenr, $remain) = @_;
1941 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0);
1945 my ($linenr, $remain, $off) = @_;
1947 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '(', ')', $off);
1950 sub ctx_block_level {
1951 my ($linenr, $remain) = @_;
1953 return ctx_block_get($linenr, $remain, 0, '{', '}', 0);
1955 sub ctx_statement_level {
1956 my ($linenr, $remain, $off) = @_;
1958 return ctx_block_get($linenr, $remain, 0, '(', ')', $off);
1961 sub ctx_locate_comment {
1962 my ($first_line, $end_line) = @_;
1964 # If c99 comment on the current line, or the line before or after
1965 my ($current_comment) = ($rawlines[$end_line - 1] =~ m@^\+.*(//.*$)@);
1966 return $current_comment if (defined $current_comment);
1967 ($current_comment) = ($rawlines[$end_line - 2] =~ m@^[\+ ].*(//.*$)@);
1968 return $current_comment if (defined $current_comment);
1969 ($current_comment) = ($rawlines[$end_line] =~ m@^[\+ ].*(//.*$)@);
1970 return $current_comment if (defined $current_comment);
1972 # Catch a comment on the end of the line itself.
1973 ($current_comment) = ($rawlines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*(?:\\\s*)?$@);
1974 return $current_comment if (defined $current_comment);
1976 # Look through the context and try and figure out if there is a
1979 $current_comment = '';
1980 for (my $linenr = $first_line; $linenr < $end_line; $linenr++) {
1981 my $line = $rawlines[$linenr - 1];
1983 if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
1986 if ($line =~ m@/\*@) {
1989 if (!$in_comment && $current_comment ne '') {
1990 $current_comment = '';
1992 $current_comment .= $line . "\n" if ($in_comment);
1993 if ($line =~ m@\*/@) {
1998 chomp($current_comment);
1999 return($current_comment);
2001 sub ctx_has_comment {
2002 my ($first_line, $end_line) = @_;
2003 my $cmt = ctx_locate_comment($first_line, $end_line);
2005 ##print "LINE: $rawlines[$end_line - 1 ]\n";
2006 ##print "CMMT: $cmt\n";
2008 return ($cmt ne '');
2012 my ($linenr, $cnt) = @_;
2014 my $offset = $linenr - 1;
2019 $line = $rawlines[$offset++];
2020 next if (defined($line) && $line =~ /^-/);
2028 my ($linenr, $lc) = @_;
2030 my $stat_real = raw_line($linenr, 0);
2031 for (my $count = $linenr + 1; $count <= $lc; $count++) {
2032 $stat_real = $stat_real . "\n" . raw_line($count, 0);
2039 my ($linenr, $cnt, $here) = @_;
2041 my $herectx = $here . "\n";
2042 for (my $n = 0; $n < $cnt; $n++) {
2043 $herectx .= raw_line($linenr, $n) . "\n";
2054 while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]]|$)/g) {
2057 $coded = sprintf("^%c", unpack('C', $2) + 64);
2066 my $av_preprocessor = 0;
2071 sub annotate_reset {
2072 $av_preprocessor = 0;
2074 @av_paren_type = ('E');
2075 $av_pend_colon = 'O';
2078 sub annotate_values {
2079 my ($stream, $type) = @_;
2082 my $var = '_' x length($stream);
2085 print "$stream\n" if ($dbg_values > 1);
2087 while (length($cur)) {
2088 @av_paren_type = ('E') if ($#av_paren_type < 0);
2089 print " <" . join('', @av_paren_type) .
2090 "> <$type> <$av_pending>" if ($dbg_values > 1);
2091 if ($cur =~ /^(\s+)/o) {
2092 print "WS($1)\n" if ($dbg_values > 1);
2093 if ($1 =~ /\n/ && $av_preprocessor) {
2094 $type = pop(@av_paren_type);
2095 $av_preprocessor = 0;
2098 } elsif ($cur =~ /^(\(\s*$Type\s*)\)/ && $av_pending eq '_') {
2099 print "CAST($1)\n" if ($dbg_values > 1);
2100 push(@av_paren_type, $type);
2103 } elsif ($cur =~ /^($Type)\s*(?:$Ident|,|\)|\(|\s*$)/) {
2104 print "DECLARE($1)\n" if ($dbg_values > 1);
2107 } elsif ($cur =~ /^($Modifier)\s*/) {
2108 print "MODIFIER($1)\n" if ($dbg_values > 1);
2111 } elsif ($cur =~ /^(\#\s*define\s*$Ident)(\(?)/o) {
2112 print "DEFINE($1,$2)\n" if ($dbg_values > 1);
2113 $av_preprocessor = 1;
2114 push(@av_paren_type, $type);
2120 } elsif ($cur =~ /^(\#\s*(?:undef\s*$Ident|include\b))/o) {
2121 print "UNDEF($1)\n" if ($dbg_values > 1);
2122 $av_preprocessor = 1;
2123 push(@av_paren_type, $type);
2125 } elsif ($cur =~ /^(\#\s*(?:ifdef|ifndef|if))/o) {
2126 print "PRE_START($1)\n" if ($dbg_values > 1);
2127 $av_preprocessor = 1;
2129 push(@av_paren_type, $type);
2130 push(@av_paren_type, $type);
2133 } elsif ($cur =~ /^(\#\s*(?:else|elif))/o) {
2134 print "PRE_RESTART($1)\n" if ($dbg_values > 1);
2135 $av_preprocessor = 1;
2137 push(@av_paren_type, $av_paren_type[$#av_paren_type]);
2141 } elsif ($cur =~ /^(\#\s*(?:endif))/o) {
2142 print "PRE_END($1)\n" if ($dbg_values > 1);
2144 $av_preprocessor = 1;
2146 # Assume all arms of the conditional end as this
2147 # one does, and continue as if the #endif was not here.
2148 pop(@av_paren_type);
2149 push(@av_paren_type, $type);
2152 } elsif ($cur =~ /^(\\\n)/o) {
2153 print "PRECONT($1)\n" if ($dbg_values > 1);
2155 } elsif ($cur =~ /^(__attribute__)\s*\(?/o) {
2156 print "ATTR($1)\n" if ($dbg_values > 1);
2157 $av_pending = $type;
2160 } elsif ($cur =~ /^(sizeof)\s*(\()?/o) {
2161 print "SIZEOF($1)\n" if ($dbg_values > 1);
2167 } elsif ($cur =~ /^(if|while|for)\b/o) {
2168 print "COND($1)\n" if ($dbg_values > 1);
2172 } elsif ($cur =~/^(case)/o) {
2173 print "CASE($1)\n" if ($dbg_values > 1);
2174 $av_pend_colon = 'C';
2177 } elsif ($cur =~/^(return|else|goto|typeof|__typeof__)\b/o) {
2178 print "KEYWORD($1)\n" if ($dbg_values > 1);
2181 } elsif ($cur =~ /^(\()/o) {
2182 print "PAREN('$1')\n" if ($dbg_values > 1);
2183 push(@av_paren_type, $av_pending);
2187 } elsif ($cur =~ /^(\))/o) {
2188 my $new_type = pop(@av_paren_type);
2189 if ($new_type ne '_') {
2191 print "PAREN('$1') -> $type\n"
2192 if ($dbg_values > 1);
2194 print "PAREN('$1')\n" if ($dbg_values > 1);
2197 } elsif ($cur =~ /^($Ident)\s*\(/o) {
2198 print "FUNC($1)\n" if ($dbg_values > 1);
2202 } elsif ($cur =~ /^($Ident\s*):(?:\s*\d+\s*(,|=|;))?/) {
2203 if (defined $2 && $type eq 'C' || $type eq 'T') {
2204 $av_pend_colon = 'B';
2205 } elsif ($type eq 'E') {
2206 $av_pend_colon = 'L';
2208 print "IDENT_COLON($1,$type>$av_pend_colon)\n" if ($dbg_values > 1);
2211 } elsif ($cur =~ /^($Ident|$Constant)/o) {
2212 print "IDENT($1)\n" if ($dbg_values > 1);
2215 } elsif ($cur =~ /^($Assignment)/o) {
2216 print "ASSIGN($1)\n" if ($dbg_values > 1);
2219 } elsif ($cur =~/^(;|{|})/) {
2220 print "END($1)\n" if ($dbg_values > 1);
2222 $av_pend_colon = 'O';
2224 } elsif ($cur =~/^(,)/) {
2225 print "COMMA($1)\n" if ($dbg_values > 1);
2228 } elsif ($cur =~ /^(\?)/o) {
2229 print "QUESTION($1)\n" if ($dbg_values > 1);
2232 } elsif ($cur =~ /^(:)/o) {
2233 print "COLON($1,$av_pend_colon)\n" if ($dbg_values > 1);
2235 substr($var, length($res), 1, $av_pend_colon);
2236 if ($av_pend_colon eq 'C' || $av_pend_colon eq 'L') {
2241 $av_pend_colon = 'O';
2243 } elsif ($cur =~ /^(\[)/o) {
2244 print "CLOSE($1)\n" if ($dbg_values > 1);
2247 } elsif ($cur =~ /^(-(?![->])|\+(?!\+)|\*|\&\&|\&)/o) {
2250 print "OPV($1)\n" if ($dbg_values > 1);
2257 substr($var, length($res), 1, $variant);
2260 } elsif ($cur =~ /^($Operators)/o) {
2261 print "OP($1)\n" if ($dbg_values > 1);
2262 if ($1 ne '++' && $1 ne '--') {
2266 } elsif ($cur =~ /(^.)/o) {
2267 print "C($1)\n" if ($dbg_values > 1);
2270 $cur = substr($cur, length($1));
2271 $res .= $type x length($1);
2275 return ($res, $var);
2279 my ($possible, $line) = @_;
2280 my $notPermitted = qr{(?:
2297 ^(?:typedef|struct|enum)\b
2299 warn "CHECK<$possible> ($line)\n" if ($dbg_possible > 2);
2300 if ($possible !~ $notPermitted) {
2301 # Check for modifiers.
2302 $possible =~ s/\s*$Storage\s*//g;
2303 $possible =~ s/\s*$Sparse\s*//g;
2304 if ($possible =~ /^\s*$/) {
2306 } elsif ($possible =~ /\s/) {
2307 $possible =~ s/\s*$Type\s*//g;
2308 for my $modifier (split(' ', $possible)) {
2309 if ($modifier !~ $notPermitted) {
2310 warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible);
2311 push(@modifierListFile, $modifier);
2316 warn "POSSIBLE: $possible ($line)\n" if ($dbg_possible);
2317 push(@typeListFile, $possible);
2321 warn "NOTPOSS: $possible ($line)\n" if ($dbg_possible > 1);
2330 $type =~ tr/[a-z]/[A-Z]/;
2332 return defined $use_type{$type} if (scalar keys %use_type > 0);
2334 return !defined $ignore_type{$type};
2338 my ($level, $type, $msg) = @_;
2340 if (!show_type($type) ||
2341 (defined $tst_only && $msg !~ /\Q$tst_only\E/)) {
2346 if ($level eq 'ERROR') {
2348 } elsif ($level eq 'WARNING') {
2354 $output .= $prefix . $level . ':';
2356 $output .= BLUE if ($color);
2357 $output .= "$type:";
2359 $output .= RESET if ($color);
2360 $output .= ' ' . $msg . "\n";
2363 my @lines = split("\n", $output, -1);
2364 splice(@lines, 1, 1);
2365 $output = join("\n", @lines);
2369 $output = (split('\n', $output))[0] . "\n";
2372 if ($verbose && exists($verbose_messages{$type}) &&
2373 !exists($verbose_emitted{$type})) {
2374 $output .= $verbose_messages{$type} . "\n\n";
2375 $verbose_emitted{$type} = 1;
2378 push(our @report, $output);
2387 sub fixup_current_range {
2388 my ($lineRef, $offset, $length) = @_;
2390 if ($$lineRef =~ /^\@\@ -\d+,\d+ \+(\d+),(\d+) \@\@/) {
2393 my $no = $o + $offset;
2394 my $nl = $l + $length;
2395 $$lineRef =~ s/\+$o,$l \@\@/\+$no,$nl \@\@/;
2399 sub fix_inserted_deleted_lines {
2400 my ($linesRef, $insertedRef, $deletedRef) = @_;
2402 my $range_last_linenr = 0;
2403 my $delta_offset = 0;
2408 my $next_insert = 0;
2409 my $next_delete = 0;
2413 my $inserted = @{$insertedRef}[$next_insert++];
2414 my $deleted = @{$deletedRef}[$next_delete++];
2416 foreach my $old_line (@{$linesRef}) {
2418 my $line = $old_line; #don't modify the array
2419 if ($line =~ /^(?:\+\+\+|\-\-\-)\s+\S+/) { #new filename
2421 } elsif ($line =~ /^\@\@ -\d+,\d+ \+\d+,\d+ \@\@/) { #new hunk
2422 $range_last_linenr = $new_linenr;
2423 fixup_current_range(\$line, $delta_offset, 0);
2426 while (defined($deleted) && ${$deleted}{'LINENR'} == $old_linenr) {
2427 $deleted = @{$deletedRef}[$next_delete++];
2429 fixup_current_range(\$lines[$range_last_linenr], $delta_offset--, -1);
2432 while (defined($inserted) && ${$inserted}{'LINENR'} == $old_linenr) {
2433 push(@lines, ${$inserted}{'LINE'});
2434 $inserted = @{$insertedRef}[$next_insert++];
2436 fixup_current_range(\$lines[$range_last_linenr], $delta_offset++, 1);
2440 push(@lines, $line);
2450 sub fix_insert_line {
2451 my ($linenr, $line) = @_;
2457 push(@fixed_inserted, $inserted);
2460 sub fix_delete_line {
2461 my ($linenr, $line) = @_;
2468 push(@fixed_deleted, $deleted);
2472 my ($type, $msg) = @_;
2474 if (report("ERROR", $type, $msg)) {
2482 my ($type, $msg) = @_;
2484 if (report("WARNING", $type, $msg)) {
2492 my ($type, $msg) = @_;
2494 if ($check && report("CHECK", $type, $msg)) {
2502 sub check_absolute_file {
2503 my ($absolute, $herecurr) = @_;
2504 my $file = $absolute;
2506 ##print "absolute<$absolute>\n";
2508 # See if any suffix of this path is a path within the tree.
2509 while ($file =~ s@^[^/]*/@@) {
2510 if (-f "$root/$file") {
2511 ##print "file<$file>\n";
2519 # It is, so see if the prefix is acceptable.
2520 my $prefix = $absolute;
2521 substr($prefix, -length($file)) = '';
2523 ##print "prefix<$prefix>\n";
2524 if ($prefix ne ".../") {
2525 WARN("USE_RELATIVE_PATH",
2526 "use relative pathname instead of absolute in changelog text\n" . $herecurr);
2533 $string =~ s/^\s+|\s+$//g;
2541 $string =~ s/^\s+//;
2549 $string =~ s/\s+$//;
2554 sub string_find_replace {
2555 my ($string, $find, $replace) = @_;
2557 $string =~ s/$find/$replace/g;
2565 my $source_indent = $tabsize;
2566 my $max_spaces_before_tab = $source_indent - 1;
2567 my $spaces_to_tab = " " x $source_indent;
2569 #convert leading spaces to tabs
2570 1 while $leading =~ s@^([\t]*)$spaces_to_tab@$1\t@g;
2571 #Remove spaces before a tab
2572 1 while $leading =~ s@^([\t]*)( {1,$max_spaces_before_tab})\t@$1\t@g;
2577 sub pos_last_openparen {
2582 my $opens = $line =~ tr/\(/\(/;
2583 my $closes = $line =~ tr/\)/\)/;
2585 my $last_openparen = 0;
2587 if (($opens == 0) || ($closes >= $opens)) {
2591 my $len = length($line);
2593 for ($pos = 0; $pos < $len; $pos++) {
2594 my $string = substr($line, $pos);
2595 if ($string =~ /^($FuncArg|$balanced_parens)/) {
2596 $pos += length($1) - 1;
2597 } elsif (substr($line, $pos, 1) eq '(') {
2598 $last_openparen = $pos;
2599 } elsif (index($string, '(') == -1) {
2604 return length(expand_tabs(substr($line, 0, $last_openparen))) + 1;
2607 sub get_raw_comment {
2608 my ($line, $rawline) = @_;
2611 for my $i (0 .. (length($line) - 1)) {
2612 if (substr($line, $i, 1) eq "$;") {
2613 $comment .= substr($rawline, $i, 1);
2620 sub exclude_global_initialisers {
2621 my ($realfile) = @_;
2623 # Do not check for BPF programs (tools/testing/selftests/bpf/progs/*.c, samples/bpf/*_kern.c, *.bpf.c).
2624 return $realfile =~ m@^tools/testing/selftests/bpf/progs/.*\.c$@ ||
2625 $realfile =~ m@^samples/bpf/.*_kern\.c$@ ||
2626 $realfile =~ m@/bpf/.*\.bpf\.c$@;
2630 my $filename = shift;
2636 my $stashrawline="";
2646 my $authorsignoff = 0;
2647 my $author_sob = '';
2649 my $is_binding_patch = -1;
2650 my $in_header_lines = $file ? 0 : 1;
2651 my $in_commit_log = 0; #Scanning lines before patch
2652 my $has_patch_separator = 0; #Found a --- line
2653 my $has_commit_log = 0; #Encountered lines before patch
2654 my $commit_log_lines = 0; #Number of commit log lines
2655 my $commit_log_possible_stack_dump = 0;
2656 my $commit_log_long_line = 0;
2657 my $commit_log_has_diff = 0;
2658 my $reported_maintainer_file = 0;
2659 my $non_utf8_charset = 0;
2661 my $last_git_commit_id_linenr = -1;
2663 my $last_blank_line = 0;
2664 my $last_coalesced_string_linenr = -1;
2672 # Trace the real file/line as we go.
2677 my $context_function; #undef'd unless there's a known function
2679 my $comment_edge = 0;
2683 my $prev_values = 'E';
2686 my %suppress_ifbraces;
2687 my %suppress_whiletrailers;
2688 my %suppress_export;
2689 my $suppress_statement = 0;
2691 my %signatures = ();
2693 # Pre-scan the patch sanitizing the lines.
2694 # Pre-scan the patch looking for any __setup documentation.
2696 my @setup_docs = ();
2699 my $camelcase_file_seeded = 0;
2701 my $checklicenseline = 1;
2703 sanitise_line_reset();
2705 foreach my $rawline (@rawlines) {
2709 push(@fixed, $rawline) if ($fix);
2711 if ($rawline=~/^\+\+\+\s+(\S+)/) {
2713 if ($1 =~ m@Documentation/admin-guide/kernel-parameters.txt$@) {
2718 if ($rawline =~ /^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
2727 # Guestimate if this is a continuing comment. Run
2728 # the context looking for a comment "edge". If this
2729 # edge is a close comment then we must be in a comment
2733 for (my $ln = $linenr + 1; $cnt > 0; $ln++) {
2734 next if (defined $rawlines[$ln - 1] &&
2735 $rawlines[$ln - 1] =~ /^-/);
2737 #print "RAW<$rawlines[$ln - 1]>\n";
2738 last if (!defined $rawlines[$ln - 1]);
2739 if ($rawlines[$ln - 1] =~ m@(/\*|\*/)@ &&
2740 $rawlines[$ln - 1] !~ m@"[^"]*(?:/\*|\*/)[^"]*"@) {
2745 if (defined $edge && $edge eq '*/') {
2749 # Guestimate if this is a continuing comment. If this
2750 # is the start of a diff block and this line starts
2751 # ' *' then it is very likely a comment.
2752 if (!defined $edge &&
2753 $rawlines[$linenr] =~ m@^.\s*(?:\*\*+| \*)(?:\s|$)@)
2758 ##print "COMMENT:$in_comment edge<$edge> $rawline\n";
2759 sanitise_line_reset($in_comment);
2761 } elsif ($realcnt && $rawline =~ /^(?:\+| |$)/) {
2762 # Standardise the strings and chars within the input to
2763 # simplify matching -- only bother with positive lines.
2764 $line = sanitise_line($rawline);
2766 push(@lines, $line);
2769 $realcnt-- if ($line =~ /^(?:\+| |$)/);
2774 #print "==>$rawline\n";
2775 #print "-->$line\n";
2777 if ($setup_docs && $line =~ /^\+/) {
2778 push(@setup_docs, $line);
2787 foreach my $line (@lines) {
2790 my $sline = $line; #copy of $line
2791 $sline =~ s/$;/ /g; #with comments as spaces
2793 my $rawline = $rawlines[$linenr - 1];
2794 my $raw_comment = get_raw_comment($line, $rawline);
2796 # check if it's a mode change, rename or start of a patch
2797 if (!$in_commit_log &&
2798 ($line =~ /^ mode change [0-7]+ => [0-7]+ \S+\s*$/ ||
2799 ($line =~ /^rename (?:from|to) \S+\s*$/ ||
2800 $line =~ /^diff --git a\/[\w\/\.\_\-]+ b\/\S+\s*$/))) {
2804 #extract the line range in the file after the patch is applied
2805 if (!$in_commit_log &&
2806 $line =~ /^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@(.*)/) {
2809 $first_line = $linenr + 1;
2819 %suppress_ifbraces = ();
2820 %suppress_whiletrailers = ();
2821 %suppress_export = ();
2822 $suppress_statement = 0;
2823 if ($context =~ /\b(\w+)\s*\(/) {
2824 $context_function = $1;
2826 undef $context_function;
2830 # track the line number as we move through the hunk, note that
2831 # new versions of GNU diff omit the leading space on completely
2832 # blank context lines so we need to count that too.
2833 } elsif ($line =~ /^( |\+|$)/) {
2835 $realcnt-- if ($realcnt != 0);
2837 # Measure the line length and indent.
2838 ($length, $indent) = line_stats($rawline);
2840 # Track the previous line.
2841 ($prevline, $stashline) = ($stashline, $line);
2842 ($previndent, $stashindent) = ($stashindent, $indent);
2843 ($prevrawline, $stashrawline) = ($stashrawline, $rawline);
2845 #warn "line<$line>\n";
2847 } elsif ($realcnt == 1) {
2851 my $hunk_line = ($realcnt != 0);
2853 $here = "#$linenr: " if (!$file);
2854 $here = "#$realline: " if ($file);
2857 # extract the filename as it passes
2858 if ($line =~ /^diff --git.*?(\S+)$/) {
2860 $realfile =~ s@^([^/]*)/@@ if (!$file);
2863 } elsif ($line =~ /^\+\+\+\s+(\S+)/) {
2865 $realfile =~ s@^([^/]*)/@@ if (!$file);
2869 if (!$file && $tree && $p1_prefix ne '' &&
2870 -e "$root/$p1_prefix") {
2871 WARN("PATCH_PREFIX",
2872 "patch prefix '$p1_prefix' exists, appears to be a -p0 patch\n");
2875 if ($realfile =~ m@^include/asm/@) {
2876 ERROR("MODIFIED_INCLUDE_ASM",
2877 "do not modify files in include/asm, change architecture specific files in include/asm-<architecture>\n" . "$here$rawline\n");
2882 #make up the handle for any error we report on this line
2884 $prefix = "$realfile:$realline: "
2887 $prefix = "$filename:$realline: ";
2889 $prefix = "$filename:$linenr: ";
2894 if (is_maintained_obsolete($realfile)) {
2896 "$realfile is marked as 'obsolete' in the MAINTAINERS hierarchy. No unnecessary modifications please.\n");
2898 if ($realfile =~ m@^(?:drivers/net/|net/|drivers/staging/)@) {
2901 $check = $check_orig;
2903 $checklicenseline = 1;
2905 if ($realfile !~ /^MAINTAINERS/) {
2906 my $last_binding_patch = $is_binding_patch;
2908 $is_binding_patch = () = $realfile =~ m@^(?:Documentation/devicetree/|include/dt-bindings/)@;
2910 if (($last_binding_patch != -1) &&
2911 ($last_binding_patch ^ $is_binding_patch)) {
2912 WARN("DT_SPLIT_BINDING_PATCH",
2913 "DT binding docs and includes should be a separate patch. See: Documentation/devicetree/bindings/submitting-patches.rst\n");
2920 $here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
2922 my $hereline = "$here\n$rawline\n";
2923 my $herecurr = "$here\n$rawline\n";
2924 my $hereprev = "$here\n$prevrawline\n$rawline\n";
2926 $cnt_lines++ if ($realcnt != 0);
2928 # Verify the existence of a commit log if appropriate
2929 # 2 is used because a $signature is counted in $commit_log_lines
2930 if ($in_commit_log) {
2931 if ($line !~ /^\s*$/) {
2932 $commit_log_lines++; #could be a $signature
2934 } elsif ($has_commit_log && $commit_log_lines < 2) {
2935 WARN("COMMIT_MESSAGE",
2936 "Missing commit description - Add an appropriate one\n");
2937 $commit_log_lines = 2; #warn only once
2940 # Check if the commit log has what seems like a diff which can confuse patch
2941 if ($in_commit_log && !$commit_log_has_diff &&
2942 (($line =~ m@^\s+diff\b.*a/([\w/]+)@ &&
2943 $line =~ m@^\s+diff\b.*a/[\w/]+\s+b/$1\b@) ||
2944 $line =~ m@^\s*(?:\-\-\-\s+a/|\+\+\+\s+b/)@ ||
2945 $line =~ m/^\s*\@\@ \-\d+,\d+ \+\d+,\d+ \@\@/)) {
2946 ERROR("DIFF_IN_COMMIT_MSG",
2947 "Avoid using diff content in the commit message - patch(1) might not work\n" . $herecurr);
2948 $commit_log_has_diff = 1;
2951 # Check for incorrect file permissions
2952 if ($line =~ /^new (file )?mode.*[7531]\d{0,2}$/) {
2953 my $permhere = $here . "FILE: $realfile\n";
2954 if ($realfile !~ m@scripts/@ &&
2955 $realfile !~ /\.(py|pl|awk|sh)$/) {
2956 ERROR("EXECUTE_PERMISSIONS",
2957 "do not set execute permissions for source files\n" . $permhere);
2961 # Check the patch for a From:
2962 if (decode("MIME-Header", $line) =~ /^From:\s*(.*)/) {
2964 my $curline = $linenr;
2965 while(defined($rawlines[$curline]) && ($rawlines[$curline++] =~ /^[ \t]\s*(.*)/)) {
2968 $author = encode("utf8", $author) if ($line =~ /=\?utf-8\?/i);
2970 $author = reformat_email($author);
2973 # Check the patch for a signoff:
2974 if ($line =~ /^\s*signed-off-by:\s*(.*)/i) {
2977 if ($author ne '' && $authorsignoff != 1) {
2978 if (same_email_addresses($1, $author)) {
2982 my ($email_name, $email_comment, $email_address, $comment1) = parse_email($ctx);
2983 my ($author_name, $author_comment, $author_address, $comment2) = parse_email($author);
2985 if (lc $email_address eq lc $author_address && $email_name eq $author_name) {
2988 } elsif (lc $email_address eq lc $author_address) {
2991 } elsif ($email_name eq $author_name) {
2995 my $address1 = $email_address;
2996 my $address2 = $author_address;
2998 if ($address1 =~ /(\S+)\+\S+(\@.*)/) {
3001 if ($address2 =~ /(\S+)\+\S+(\@.*)/) {
3004 if ($address1 eq $address2) {
3012 # Check for patch separator
3013 if ($line =~ /^---$/) {
3014 $has_patch_separator = 1;
3018 # Check if MAINTAINERS is being updated. If so, there's probably no need to
3019 # emit the "does MAINTAINERS need updating?" message on file add/move/delete
3020 if ($line =~ /^\s*MAINTAINERS\s*\|/) {
3021 $reported_maintainer_file = 1;
3024 # Check signature styles
3025 if (!$in_header_lines &&
3026 $line =~ /^(\s*)([a-z0-9_-]+by:|$signature_tags)(\s*)(.*)/i) {
3027 my $space_before = $1;
3029 my $space_after = $3;
3031 my $ucfirst_sign_off = ucfirst(lc($sign_off));
3033 if ($sign_off !~ /$signature_tags/) {
3034 my $suggested_signature = find_standard_signature($sign_off);
3035 if ($suggested_signature eq "") {
3036 WARN("BAD_SIGN_OFF",
3037 "Non-standard signature: $sign_off\n" . $herecurr);
3039 if (WARN("BAD_SIGN_OFF",
3040 "Non-standard signature: '$sign_off' - perhaps '$suggested_signature'?\n" . $herecurr) &&
3042 $fixed[$fixlinenr] =~ s/$sign_off/$suggested_signature/;
3046 if (defined $space_before && $space_before ne "") {
3047 if (WARN("BAD_SIGN_OFF",
3048 "Do not use whitespace before $ucfirst_sign_off\n" . $herecurr) &&
3050 $fixed[$fixlinenr] =
3051 "$ucfirst_sign_off $email";
3054 if ($sign_off =~ /-by:$/i && $sign_off ne $ucfirst_sign_off) {
3055 if (WARN("BAD_SIGN_OFF",
3056 "'$ucfirst_sign_off' is the preferred signature form\n" . $herecurr) &&
3058 $fixed[$fixlinenr] =
3059 "$ucfirst_sign_off $email";
3063 if (!defined $space_after || $space_after ne " ") {
3064 if (WARN("BAD_SIGN_OFF",
3065 "Use a single space after $ucfirst_sign_off\n" . $herecurr) &&
3067 $fixed[$fixlinenr] =
3068 "$ucfirst_sign_off $email";
3072 my ($email_name, $name_comment, $email_address, $comment) = parse_email($email);
3073 my $suggested_email = format_email(($email_name, $name_comment, $email_address, $comment));
3074 if ($suggested_email eq "") {
3075 ERROR("BAD_SIGN_OFF",
3076 "Unrecognized email address: '$email'\n" . $herecurr);
3078 my $dequoted = $suggested_email;
3079 $dequoted =~ s/^"//;
3080 $dequoted =~ s/" </ </;
3081 # Don't force email to have quotes
3082 # Allow just an angle bracketed address
3083 if (!same_email_addresses($email, $suggested_email)) {
3084 if (WARN("BAD_SIGN_OFF",
3085 "email address '$email' might be better as '$suggested_email'\n" . $herecurr) &&
3087 $fixed[$fixlinenr] =~ s/\Q$email\E/$suggested_email/;
3091 # Address part shouldn't have comments
3092 my $stripped_address = $email_address;
3093 $stripped_address =~ s/\([^\(\)]*\)//g;
3094 if ($email_address ne $stripped_address) {
3095 if (WARN("BAD_SIGN_OFF",
3096 "address part of email should not have comments: '$email_address'\n" . $herecurr) &&
3098 $fixed[$fixlinenr] =~ s/\Q$email_address\E/$stripped_address/;
3102 # Only one name comment should be allowed
3103 my $comment_count = () = $name_comment =~ /\([^\)]+\)/g;
3104 if ($comment_count > 1) {
3105 WARN("BAD_SIGN_OFF",
3106 "Use a single name comment in email: '$email'\n" . $herecurr);
3110 # stable@vger.kernel.org or stable@kernel.org shouldn't
3111 # have an email name. In addition comments should strictly
3113 if ($email =~ /^.*stable\@(?:vger\.)?kernel\.org/i) {
3114 if (($comment ne "" && $comment !~ /^#.+/) ||
3115 ($email_name ne "")) {
3116 my $cur_name = $email_name;
3117 my $new_comment = $comment;
3118 $cur_name =~ s/[a-zA-Z\s\-\"]+//g;
3120 # Remove brackets enclosing comment text
3121 # and # from start of comments to get comment text
3122 $new_comment =~ s/^\((.*)\)$/$1/;
3123 $new_comment =~ s/^\[(.*)\]$/$1/;
3124 $new_comment =~ s/^[\s\#]+|\s+$//g;
3126 $new_comment = trim("$new_comment $cur_name") if ($cur_name ne $new_comment);
3127 $new_comment = " # $new_comment" if ($new_comment ne "");
3128 my $new_email = "$email_address$new_comment";
3130 if (WARN("BAD_STABLE_ADDRESS_STYLE",
3131 "Invalid email format for stable: '$email', prefer '$new_email'\n" . $herecurr) &&
3133 $fixed[$fixlinenr] =~ s/\Q$email\E/$new_email/;
3136 } elsif ($comment ne "" && $comment !~ /^(?:#.+|\(.+\))$/) {
3137 my $new_comment = $comment;
3139 # Extract comment text from within brackets or
3140 # c89 style /*...*/ comments
3141 $new_comment =~ s/^\[(.*)\]$/$1/;
3142 $new_comment =~ s/^\/\*(.*)\*\/$/$1/;
3144 $new_comment = trim($new_comment);
3145 $new_comment =~ s/^[^\w]$//; # Single lettered comment with non word character is usually a typo
3146 $new_comment = "($new_comment)" if ($new_comment ne "");
3147 my $new_email = format_email($email_name, $name_comment, $email_address, $new_comment);
3149 if (WARN("BAD_SIGN_OFF",
3150 "Unexpected content after email: '$email', should be: '$new_email'\n" . $herecurr) &&
3152 $fixed[$fixlinenr] =~ s/\Q$email\E/$new_email/;
3157 # Check for duplicate signatures
3158 my $sig_nospace = $line;
3159 $sig_nospace =~ s/\s//g;
3160 $sig_nospace = lc($sig_nospace);
3161 if (defined $signatures{$sig_nospace}) {
3162 WARN("BAD_SIGN_OFF",
3163 "Duplicate signature\n" . $herecurr);
3165 $signatures{$sig_nospace} = 1;
3168 # Check Co-developed-by: immediately followed by Signed-off-by: with same name and email
3169 if ($sign_off =~ /^co-developed-by:$/i) {
3170 if ($email eq $author) {
3171 WARN("BAD_SIGN_OFF",
3172 "Co-developed-by: should not be used to attribute nominal patch author '$author'\n" . "$here\n" . $rawline);
3174 if (!defined $lines[$linenr]) {
3175 WARN("BAD_SIGN_OFF",
3176 "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline);
3177 } elsif ($rawlines[$linenr] !~ /^\s*signed-off-by:\s*(.*)/i) {
3178 WARN("BAD_SIGN_OFF",
3179 "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]);
3180 } elsif ($1 ne $email) {
3181 WARN("BAD_SIGN_OFF",
3182 "Co-developed-by and Signed-off-by: name/email do not match \n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]);
3187 # Check email subject for common tools that don't need to be mentioned
3188 if ($in_header_lines &&
3189 $line =~ /^Subject:.*\b(?:checkpatch|sparse|smatch)\b[^:]/i) {
3190 WARN("EMAIL_SUBJECT",
3191 "A patch subject line should describe the change not the tool that found it\n" . $herecurr);
3194 # Check for Gerrit Change-Ids not in any patch context
3195 if ($realfile eq '' && !$has_patch_separator && $line =~ /^\s*change-id:/i) {
3196 if (ERROR("GERRIT_CHANGE_ID",
3197 "Remove Gerrit Change-Id's before submitting upstream\n" . $herecurr) &&
3199 fix_delete_line($fixlinenr, $rawline);
3203 # Check if the commit log is in a possible stack dump
3204 if ($in_commit_log && !$commit_log_possible_stack_dump &&
3205 ($line =~ /^\s*(?:WARNING:|BUG:)/ ||
3206 $line =~ /^\s*\[\s*\d+\.\d{6,6}\s*\]/ ||
3208 $line =~ /^\s*\[\<[0-9a-fA-F]{8,}\>\]/) ||
3209 $line =~ /^(?:\s+\w+:\s+[0-9a-fA-F]+){3,3}/ ||
3210 $line =~ /^\s*\#\d+\s*\[[0-9a-fA-F]+\]\s*\w+ at [0-9a-fA-F]+/) {
3211 # stack dump address styles
3212 $commit_log_possible_stack_dump = 1;
3215 # Check for line lengths > 75 in commit log, warn once
3216 if ($in_commit_log && !$commit_log_long_line &&
3217 length($line) > 75 &&
3218 !($line =~ /^\s*[a-zA-Z0-9_\/\.]+\s+\|\s+\d+/ ||
3219 # file delta changes
3220 $line =~ /^\s*(?:[\w\.\-\+]*\/)++[\w\.\-\+]+:/ ||
3222 $line =~ /^\s*(?:Fixes:|Link:|$signature_tags)/i ||
3223 # A Fixes: or Link: line or signature tag line
3224 $commit_log_possible_stack_dump)) {
3225 WARN("COMMIT_LOG_LONG_LINE",
3226 "Possible unwrapped commit description (prefer a maximum 75 chars per line)\n" . $herecurr);
3227 $commit_log_long_line = 1;
3230 # Reset possible stack dump if a blank line is found
3231 if ($in_commit_log && $commit_log_possible_stack_dump &&
3233 $commit_log_possible_stack_dump = 0;
3236 # Check for lines starting with a #
3237 if ($in_commit_log && $line =~ /^#/) {
3238 if (WARN("COMMIT_COMMENT_SYMBOL",
3239 "Commit log lines starting with '#' are dropped by git as comments\n" . $herecurr) &&
3241 $fixed[$fixlinenr] =~ s/^/ /;
3245 # Check for git id commit length and improperly formed commit descriptions
3246 # A correctly formed commit description is:
3247 # commit <SHA-1 hash length 12+ chars> ("Complete commit subject")
3248 # with the commit subject '("' prefix and '")' suffix
3249 # This is a fairly compilicated block as it tests for what appears to be
3250 # bare SHA-1 hash with minimum length of 5. It also avoids several types of
3251 # possible SHA-1 matches.
3252 # A commit match can span multiple lines so this block attempts to find a
3253 # complete typical commit on a maximum of 3 lines
3254 if ($perl_version_ok &&
3255 $in_commit_log && !$commit_log_possible_stack_dump &&
3256 $line !~ /^\s*(?:Link|Patchwork|http|https|BugLink|base-commit):/i &&
3257 $line !~ /^This reverts commit [0-9a-f]{7,40}/ &&
3258 (($line =~ /\bcommit\s+[0-9a-f]{5,}\b/i ||
3259 ($line =~ /\bcommit\s*$/i && defined($rawlines[$linenr]) && $rawlines[$linenr] =~ /^\s*[0-9a-f]{5,}\b/i)) ||
3260 ($line =~ /(?:\s|^)[0-9a-f]{12,40}(?:[\s"'\(\[]|$)/i &&
3261 $line !~ /[\<\[][0-9a-f]{12,40}[\>\]]/i &&
3262 $line !~ /\bfixes:\s*[0-9a-f]{12,40}/i))) {
3263 my $init_char = "c";
3264 my $orig_commit = "";
3269 my $id = '0123456789ab';
3270 my $orig_desc = "commit description";
3271 my $description = "";
3272 my $herectx = $herecurr;
3277 if ($line =~ /(?:\bcommit\s+[0-9a-f]{5,}|\bcommit\s*$)/i) {
3278 for (my $n = 0; $n < 2; $n++) {
3279 if ($input =~ /\bcommit\s+[0-9a-f]{5,}\s*($balanced_parens)/i) {
3282 # Always strip leading/trailing parens then double quotes if existing
3283 $orig_desc = substr($orig_desc, 1, -1);
3284 if ($orig_desc =~ /^".*"$/) {
3285 $orig_desc = substr($orig_desc, 1, -1);
3290 last if ($#lines < $linenr + $n);
3291 $input .= " " . trim($rawlines[$linenr + $n]);
3292 $herectx .= "$rawlines[$linenr + $n]\n";
3294 $herectx = $herecurr if (!$has_parens);
3297 if ($input =~ /\b(c)ommit\s+([0-9a-f]{5,})\b/i) {
3299 $orig_commit = lc($2);
3300 $short = 0 if ($input =~ /\bcommit\s+[0-9a-f]{12,40}/i);
3301 $long = 1 if ($input =~ /\bcommit\s+[0-9a-f]{41,}/i);
3302 $space = 0 if ($input =~ /\bcommit [0-9a-f]/i);
3303 $case = 0 if ($input =~ /\b[Cc]ommit\s+[0-9a-f]{5,40}[^A-F]/);
3304 } elsif ($input =~ /\b([0-9a-f]{12,40})\b/i) {
3305 $orig_commit = lc($1);
3308 ($id, $description) = git_commit_info($orig_commit,
3312 ($short || $long || $space || $case || ($orig_desc ne $description) || !$has_quotes) &&
3313 $last_git_commit_id_linenr != $linenr - 1) {
3314 ERROR("GIT_COMMIT_ID",
3315 "Please use git commit description style 'commit <12+ chars of sha1> (\"<title line>\")' - ie: '${init_char}ommit $id (\"$description\")'\n" . $herectx);
3317 #don't report the next line if this line ends in commit and the sha1 hash is the next line
3318 $last_git_commit_id_linenr = $linenr if ($line =~ /\bcommit\s*$/i);
3321 # Check for added, moved or deleted files
3322 if (!$reported_maintainer_file && !$in_commit_log &&
3323 ($line =~ /^(?:new|deleted) file mode\s*\d+\s*$/ ||
3324 $line =~ /^rename (?:from|to) [\w\/\.\-]+\s*$/ ||
3325 ($line =~ /\{\s*([\w\/\.\-]*)\s*\=\>\s*([\w\/\.\-]*)\s*\}/ &&
3326 (defined($1) || defined($2))))) {
3328 $reported_maintainer_file = 1;
3329 WARN("FILE_PATH_CHANGES",
3330 "added, moved or deleted file(s), does MAINTAINERS need updating?\n" . $herecurr);
3333 # Check for adding new DT bindings not in schema format
3334 if (!$in_commit_log &&
3335 ($line =~ /^new file mode\s*\d+\s*$/) &&
3336 ($realfile =~ m@^Documentation/devicetree/bindings/.*\.txt$@)) {
3337 WARN("DT_SCHEMA_BINDING_PATCH",
3338 "DT bindings should be in DT schema format. See: Documentation/devicetree/bindings/writing-schema.rst\n");
3341 # Check for wrappage within a valid hunk of the file
3342 if ($realcnt != 0 && $line !~ m{^(?:\+|-| |\\ No newline|$)}) {
3343 ERROR("CORRUPTED_PATCH",
3344 "patch seems to be corrupt (line wrapped?)\n" .
3345 $herecurr) if (!$emitted_corrupt++);
3348 # UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
3349 if (($realfile =~ /^$/ || $line =~ /^\+/) &&
3350 $rawline !~ m/^$UTF8*$/) {
3351 my ($utf8_prefix) = ($rawline =~ /^($UTF8*)/);
3353 my $blank = copy_spacing($rawline);
3354 my $ptr = substr($blank, 0, length($utf8_prefix)) . "^";
3355 my $hereptr = "$hereline$ptr\n";
3358 "Invalid UTF-8, patch and commit message should be encoded in UTF-8\n" . $hereptr);
3361 # Check if it's the start of a commit log
3362 # (not a header line and we haven't seen the patch filename)
3363 if ($in_header_lines && $realfile =~ /^$/ &&
3364 !($rawline =~ /^\s+(?:\S|$)/ ||
3365 $rawline =~ /^(?:commit\b|from\b|[\w-]+:)/i)) {
3366 $in_header_lines = 0;
3368 $has_commit_log = 1;
3371 # Check if there is UTF-8 in a commit log when a mail header has explicitly
3372 # declined it, i.e defined some charset where it is missing.
3373 if ($in_header_lines &&
3374 $rawline =~ /^Content-Type:.+charset="(.+)".*$/ &&
3376 $non_utf8_charset = 1;
3379 if ($in_commit_log && $non_utf8_charset && $realfile =~ /^$/ &&
3380 $rawline =~ /$NON_ASCII_UTF8/) {
3381 WARN("UTF8_BEFORE_PATCH",
3382 "8-bit UTF-8 used in possible commit log\n" . $herecurr);
3385 # Check for absolute kernel paths in commit message
3386 if ($tree && $in_commit_log) {
3387 while ($line =~ m{(?:^|\s)(/\S*)}g) {
3390 if ($file =~ m{^(.*?)(?::\d+)+:?$} &&
3391 check_absolute_file($1, $herecurr)) {
3394 check_absolute_file($file, $herecurr);
3399 # Check for various typo / spelling mistakes
3400 if (defined($misspellings) &&
3401 ($in_commit_log || $line =~ /^(?:\+|Subject:)/i)) {
3402 while ($rawline =~ /(?:^|[^\w\-'`])($misspellings)(?:[^\w\-'`]|$)/gi) {
3404 my $blank = copy_spacing($rawline);
3405 my $ptr = substr($blank, 0, $-[1]) . "^" x length($typo);
3406 my $hereptr = "$hereline$ptr\n";
3407 my $typo_fix = $spelling_fix{lc($typo)};
3408 $typo_fix = ucfirst($typo_fix) if ($typo =~ /^[A-Z]/);
3409 $typo_fix = uc($typo_fix) if ($typo =~ /^[A-Z]+$/);
3410 my $msg_level = \&WARN;
3411 $msg_level = \&CHK if ($file);
3412 if (&{$msg_level}("TYPO_SPELLING",
3413 "'$typo' may be misspelled - perhaps '$typo_fix'?\n" . $hereptr) &&
3415 $fixed[$fixlinenr] =~ s/(^|[^A-Za-z@])($typo)($|[^A-Za-z@])/$1$typo_fix$3/;
3420 # check for invalid commit id
3421 if ($in_commit_log && $line =~ /(^fixes:|\bcommit)\s+([0-9a-f]{6,40})\b/i) {
3424 ($id, $description) = git_commit_info($2, undef, undef);
3425 if (!defined($id)) {
3426 WARN("UNKNOWN_COMMIT_ID",
3427 "Unknown commit id '$2', maybe rebased or not pulled?\n" . $herecurr);
3431 # check for repeated words separated by a single space
3432 # avoid false positive from list command eg, '-rw-r--r-- 1 root root'
3433 if (($rawline =~ /^\+/ || $in_commit_log) &&
3434 $rawline !~ /[bcCdDlMnpPs\?-][rwxsStT-]{9}/) {
3435 pos($rawline) = 1 if (!$in_commit_log);
3436 while ($rawline =~ /\b($word_pattern) (?=($word_pattern))/g) {
3440 my $start_pos = $-[1];
3441 my $end_pos = $+[2];
3442 if ($first =~ /(?:struct|union|enum)/) {
3443 pos($rawline) += length($first) + length($second) + 1;
3447 next if (lc($first) ne lc($second));
3448 next if ($first eq 'long');
3450 # check for character before and after the word matches
3451 my $start_char = '';
3453 $start_char = substr($rawline, $start_pos - 1, 1) if ($start_pos > ($in_commit_log ? 0 : 1));
3454 $end_char = substr($rawline, $end_pos, 1) if ($end_pos < length($rawline));
3456 next if ($start_char =~ /^\S$/);
3457 next if (index(" \t.,;?!", $end_char) == -1);
3459 # avoid repeating hex occurrences like 'ff ff fe 09 ...'
3460 if ($first =~ /\b[0-9a-f]{2,}\b/i) {
3461 next if (!exists($allow_repeated_words{lc($first)}));
3464 if (WARN("REPEATED_WORD",
3465 "Possible repeated word: '$first'\n" . $herecurr) &&
3467 $fixed[$fixlinenr] =~ s/\b$first $second\b/$first/;
3471 # if it's a repeated word on consecutive lines in a comment block
3472 if ($prevline =~ /$;+\s*$/ &&
3473 $prevrawline =~ /($word_pattern)\s*$/) {
3475 if ($rawline =~ /^\+\s*\*\s*$last_word /) {
3476 if (WARN("REPEATED_WORD",
3477 "Possible repeated word: '$last_word'\n" . $hereprev) &&
3479 $fixed[$fixlinenr] =~ s/(\+\s*\*\s*)$last_word /$1/;
3485 # ignore non-hunk lines and lines being removed
3486 next if (!$hunk_line || $line =~ /^-/);
3488 #trailing whitespace
3489 if ($line =~ /^\+.*\015/) {
3490 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3491 if (ERROR("DOS_LINE_ENDINGS",
3492 "DOS line endings\n" . $herevet) &&
3494 $fixed[$fixlinenr] =~ s/[\s\015]+$//;
3496 } elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) {
3497 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3498 if (ERROR("TRAILING_WHITESPACE",
3499 "trailing whitespace\n" . $herevet) &&
3501 $fixed[$fixlinenr] =~ s/\s+$//;
3507 # Check for FSF mailing addresses.
3508 if ($rawline =~ /\bwrite to the Free/i ||
3509 $rawline =~ /\b675\s+Mass\s+Ave/i ||
3510 $rawline =~ /\b59\s+Temple\s+Pl/i ||
3511 $rawline =~ /\b51\s+Franklin\s+St/i) {
3512 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3513 my $msg_level = \&ERROR;
3514 $msg_level = \&CHK if ($file);
3515 &{$msg_level}("FSF_MAILING_ADDRESS",
3516 "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. Linux already includes a copy of the GPL.\n" . $herevet)
3519 # check for Kconfig help text having a real description
3520 # Only applies when adding the entry originally, after that we do not have
3521 # sufficient context to determine whether it is indeed long enough.
3522 if ($realfile =~ /Kconfig/ &&
3523 # 'choice' is usually the last thing on the line (though
3524 # Kconfig supports named choices), so use a word boundary
3525 # (\b) rather than a whitespace character (\s)
3526 $line =~ /^\+\s*(?:config|menuconfig|choice)\b/) {
3530 my $help_length = 0;
3531 while (defined $lines[$ln]) {
3532 my $f = $lines[$ln++];
3534 next if ($f =~ /^-/);
3535 last if ($f !~ /^[\+ ]/); # !patch context
3537 if ($f =~ /^\+\s*(?:bool|tristate|prompt)\s*["']/) {
3541 if ($f =~ /^\+\s*help\s*$/) {
3546 $f =~ s/^.//; # strip patch context [+ ]
3547 $f =~ s/#.*//; # strip # directives
3548 $f =~ s/^\s+//; # strip leading blanks
3549 next if ($f =~ /^$/); # skip blank lines
3551 # At the end of this Kconfig block:
3552 # This only checks context lines in the patch
3553 # and so hopefully shouldn't trigger false
3554 # positives, even though some of these are
3555 # common words in help texts
3556 if ($f =~ /^(?:config|menuconfig|choice|endchoice|
3557 if|endif|menu|endmenu|source)\b/x) {
3560 $help_length++ if ($has_help);
3563 $help_length < $min_conf_desc_length) {
3564 my $stat_real = get_stat_real($linenr, $ln - 1);
3565 WARN("CONFIG_DESCRIPTION",
3566 "please write a help paragraph that fully describes the config symbol\n" . "$here\n$stat_real\n");
3570 # check MAINTAINERS entries
3571 if ($realfile =~ /^MAINTAINERS$/) {
3572 # check MAINTAINERS entries for the right form
3573 if ($rawline =~ /^\+[A-Z]:/ &&
3574 $rawline !~ /^\+[A-Z]:\t\S/) {
3575 if (WARN("MAINTAINERS_STYLE",
3576 "MAINTAINERS entries use one tab after TYPE:\n" . $herecurr) &&
3578 $fixed[$fixlinenr] =~ s/^(\+[A-Z]):\s*/$1:\t/;
3581 # check MAINTAINERS entries for the right ordering too
3582 my $preferred_order = 'MRLSWQBCPTFXNK';
3583 if ($rawline =~ /^\+[A-Z]:/ &&
3584 $prevrawline =~ /^[\+ ][A-Z]:/) {
3585 $rawline =~ /^\+([A-Z]):\s*(.*)/;
3588 $prevrawline =~ /^[\+ ]([A-Z]):\s*(.*)/;
3591 my $curindex = index($preferred_order, $cur);
3592 my $previndex = index($preferred_order, $prev);
3593 if ($curindex < 0) {
3594 WARN("MAINTAINERS_STYLE",
3595 "Unknown MAINTAINERS entry type: '$cur'\n" . $herecurr);
3597 if ($previndex >= 0 && $curindex < $previndex) {
3598 WARN("MAINTAINERS_STYLE",
3599 "Misordered MAINTAINERS entry - list '$cur:' before '$prev:'\n" . $hereprev);
3600 } elsif ((($prev eq 'F' && $cur eq 'F') ||
3601 ($prev eq 'X' && $cur eq 'X')) &&
3602 ($prevval cmp $curval) > 0) {
3603 WARN("MAINTAINERS_STYLE",
3604 "Misordered MAINTAINERS entry - list file patterns in alphabetic order\n" . $hereprev);
3610 if (($realfile =~ /Makefile.*/ || $realfile =~ /Kbuild.*/) &&
3611 ($line =~ /\+(EXTRA_[A-Z]+FLAGS).*/)) {
3614 'EXTRA_AFLAGS' => 'asflags-y',
3615 'EXTRA_CFLAGS' => 'ccflags-y',
3616 'EXTRA_CPPFLAGS' => 'cppflags-y',
3617 'EXTRA_LDFLAGS' => 'ldflags-y',
3620 WARN("DEPRECATED_VARIABLE",
3621 "Use of $flag is deprecated, please use \`$replacement->{$flag} instead.\n" . $herecurr) if ($replacement->{$flag});
3624 # check for DT compatible documentation
3625 if (defined $root &&
3626 (($realfile =~ /\.dtsi?$/ && $line =~ /^\+\s*compatible\s*=\s*\"/) ||
3627 ($realfile =~ /\.[ch]$/ && $line =~ /^\+.*\.compatible\s*=\s*\"/))) {
3629 my @compats = $rawline =~ /\"([a-zA-Z0-9\-\,\.\+_]+)\"/g;
3631 my $dt_path = $root . "/Documentation/devicetree/bindings/";
3632 my $vp_file = $dt_path . "vendor-prefixes.yaml";
3634 foreach my $compat (@compats) {
3635 my $compat2 = $compat;
3636 $compat2 =~ s/\,[a-zA-Z0-9]*\-/\,<\.\*>\-/;
3637 my $compat3 = $compat;
3638 $compat3 =~ s/\,([a-z]*)[0-9]*\-/\,$1<\.\*>\-/;
3639 `grep -Erq "$compat|$compat2|$compat3" $dt_path`;
3641 WARN("UNDOCUMENTED_DT_STRING",
3642 "DT compatible string \"$compat\" appears un-documented -- check $dt_path\n" . $herecurr);
3645 next if $compat !~ /^([a-zA-Z0-9\-]+)\,/;
3647 `grep -Eq "\\"\\^\Q$vendor\E,\\.\\*\\":" $vp_file`;
3649 WARN("UNDOCUMENTED_DT_STRING",
3650 "DT compatible string vendor \"$vendor\" appears un-documented -- check $vp_file\n" . $herecurr);
3655 # check for using SPDX license tag at beginning of files
3656 if ($realline == $checklicenseline) {
3657 if ($rawline =~ /^[ \+]\s*\#\!\s*\//) {
3658 $checklicenseline = 2;
3659 } elsif ($rawline =~ /^\+/) {
3661 if ($realfile =~ /\.(h|s|S)$/) {
3663 } elsif ($realfile =~ /\.(c|dts|dtsi)$/) {
3665 } elsif (($checklicenseline == 2) || $realfile =~ /\.(sh|pl|py|awk|tc|yaml)$/) {
3667 } elsif ($realfile =~ /\.rst$/) {
3671 # check SPDX comment style for .[chsS] files
3672 if ($realfile =~ /\.[chsS]$/ &&
3673 $rawline =~ /SPDX-License-Identifier:/ &&
3674 $rawline !~ m@^\+\s*\Q$comment\E\s*@) {
3675 WARN("SPDX_LICENSE_TAG",
3676 "Improper SPDX comment style for '$realfile', please use '$comment' instead\n" . $herecurr);
3679 if ($comment !~ /^$/ &&
3680 $rawline !~ m@^\+\Q$comment\E SPDX-License-Identifier: @) {
3681 WARN("SPDX_LICENSE_TAG",
3682 "Missing or malformed SPDX-License-Identifier tag in line $checklicenseline\n" . $herecurr);
3683 } elsif ($rawline =~ /(SPDX-License-Identifier: .*)/) {
3684 my $spdx_license = $1;
3685 if (!is_SPDX_License_valid($spdx_license)) {
3686 WARN("SPDX_LICENSE_TAG",
3687 "'$spdx_license' is not supported in LICENSES/...\n" . $herecurr);
3689 if ($realfile =~ m@^Documentation/devicetree/bindings/@ &&
3690 not $spdx_license =~ /GPL-2\.0.*BSD-2-Clause/) {
3691 my $msg_level = \&WARN;
3692 $msg_level = \&CHK if ($file);
3693 if (&{$msg_level}("SPDX_LICENSE_TAG",
3695 "DT binding documents should be licensed (GPL-2.0-only OR BSD-2-Clause)\n" . $herecurr) &&
3697 $fixed[$fixlinenr] =~ s/SPDX-License-Identifier: .*/SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)/;
3704 # check for embedded filenames
3705 if ($rawline =~ /^\+.*\Q$realfile\E/) {
3706 WARN("EMBEDDED_FILENAME",
3707 "It's generally not useful to have the filename in the file\n" . $herecurr);
3710 # check we are in a valid source file if not then ignore this hunk
3711 next if ($realfile !~ /\.(h|c|s|S|sh|dtsi|dts)$/);
3713 # check for using SPDX-License-Identifier on the wrong line number
3714 if ($realline != $checklicenseline &&
3715 $rawline =~ /\bSPDX-License-Identifier:/ &&
3716 substr($line, @-, @+ - @-) eq "$;" x (@+ - @-)) {
3717 WARN("SPDX_LICENSE_TAG",
3718 "Misplaced SPDX-License-Identifier tag - use line $checklicenseline instead\n" . $herecurr);
3721 # line length limit (with some exclusions)
3723 # There are a few types of lines that may extend beyond $max_line_length:
3724 # logging functions like pr_info that end in a string
3725 # lines with a single string
3726 # #defines that are a single string
3727 # lines with an RFC3986 like URL
3729 # There are 3 different line length message types:
3730 # LONG_LINE_COMMENT a comment starts before but extends beyond $max_line_length
3731 # LONG_LINE_STRING a string starts before but extends beyond $max_line_length
3732 # LONG_LINE all other lines longer than $max_line_length
3734 # if LONG_LINE is ignored, the other 2 types are also ignored
3737 if ($line =~ /^\+/ && $length > $max_line_length) {
3738 my $msg_type = "LONG_LINE";
3740 # Check the allowed long line types first
3742 # logging functions that end in a string that starts
3743 # before $max_line_length
3744 if ($line =~ /^\+\s*$logFunctions\s*\(\s*(?:(?:KERN_\S+\s*|[^"]*))?($String\s*(?:|,|\)\s*;)\s*)$/ &&
3745 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) {
3748 # lines with only strings (w/ possible termination)
3749 # #defines with only strings
3750 } elsif ($line =~ /^\+\s*$String\s*(?:\s*|,|\)\s*;)\s*$/ ||
3751 $line =~ /^\+\s*#\s*define\s+\w+\s+$String$/) {
3754 # More special cases
3755 } elsif ($line =~ /^\+.*\bEFI_GUID\s*\(/ ||
3756 $line =~ /^\+\s*(?:\w+)?\s*DEFINE_PER_CPU/) {
3759 # URL ($rawline is used in case the URL is in a comment)
3760 } elsif ($rawline =~ /^\+.*\b[a-z][\w\.\+\-]*:\/\/\S+/i) {
3763 # Otherwise set the alternate message types
3765 # a comment starts before $max_line_length
3766 } elsif ($line =~ /($;[\s$;]*)$/ &&
3767 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) {
3768 $msg_type = "LONG_LINE_COMMENT"
3770 # a quoted string starts before $max_line_length
3771 } elsif ($sline =~ /\s*($String(?:\s*(?:\\|,\s*|\)\s*;\s*))?)$/ &&
3772 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) {
3773 $msg_type = "LONG_LINE_STRING"
3776 if ($msg_type ne "" &&
3777 (show_type("LONG_LINE") || show_type($msg_type))) {
3778 my $msg_level = \&WARN;
3779 $msg_level = \&CHK if ($file);
3780 &{$msg_level}($msg_type,
3781 "line length of $length exceeds $max_line_length columns\n" . $herecurr);
3785 # check for adding lines without a newline.
3786 if ($line =~ /^\+/ && defined $lines[$linenr] && $lines[$linenr] =~ /^\\ No newline at end of file/) {
3787 if (WARN("MISSING_EOF_NEWLINE",
3788 "adding a line without newline at end of file\n" . $herecurr) &&
3790 fix_delete_line($fixlinenr+1, "No newline at end of file");
3794 # check for .L prefix local symbols in .S files
3795 if ($realfile =~ /\.S$/ &&
3796 $line =~ /^\+\s*(?:[A-Z]+_)?SYM_[A-Z]+_(?:START|END)(?:_[A-Z_]+)?\s*\(\s*\.L/) {
3797 WARN("AVOID_L_PREFIX",
3798 "Avoid using '.L' prefixed local symbol names for denoting a range of code via 'SYM_*_START/END' annotations; see Documentation/asm-annotations.rst\n" . $herecurr);
3801 # check we are in a valid source file C or perl if not then ignore this hunk
3802 next if ($realfile !~ /\.(h|c|pl|dtsi|dts)$/);
3804 # at the beginning of a line any tabs must come first and anything
3805 # more than $tabsize must use tabs.
3806 if ($rawline =~ /^\+\s* \t\s*\S/ ||
3807 $rawline =~ /^\+\s* \s*/) {
3808 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3810 if (ERROR("CODE_INDENT",
3811 "code indent should use tabs where possible\n" . $herevet) &&
3813 $fixed[$fixlinenr] =~ s/^\+([ \t]+)/"\+" . tabify($1)/e;
3817 # check for space before tabs.
3818 if ($rawline =~ /^\+/ && $rawline =~ / \t/) {
3819 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3820 if (WARN("SPACE_BEFORE_TAB",
3821 "please, no space before tabs\n" . $herevet) &&
3823 while ($fixed[$fixlinenr] =~
3824 s/(^\+.*) {$tabsize,$tabsize}\t/$1\t\t/) {}
3825 while ($fixed[$fixlinenr] =~
3826 s/(^\+.*) +\t/$1\t/) {}
3830 # check for assignments on the start of a line
3831 if ($sline =~ /^\+\s+($Assignment)[^=]/) {
3833 if (CHK("ASSIGNMENT_CONTINUATIONS",
3834 "Assignment operator '$1' should be on the previous line\n" . $hereprev) &&
3835 $fix && $prevrawline =~ /^\+/) {
3836 # add assignment operator to the previous line, remove from current line
3837 $fixed[$fixlinenr - 1] .= " $operator";
3838 $fixed[$fixlinenr] =~ s/\Q$operator\E\s*//;
3842 # check for && or || at the start of a line
3843 if ($rawline =~ /^\+\s*(&&|\|\|)/) {
3845 if (CHK("LOGICAL_CONTINUATIONS",
3846 "Logical continuations should be on the previous line\n" . $hereprev) &&
3847 $fix && $prevrawline =~ /^\+/) {
3848 # insert logical operator at last non-comment, non-whitepsace char on previous line
3849 $prevline =~ /[\s$;]*$/;
3850 my $line_end = substr($prevrawline, $-[0]);
3851 $fixed[$fixlinenr - 1] =~ s/\Q$line_end\E$/ $operator$line_end/;
3852 $fixed[$fixlinenr] =~ s/\Q$operator\E\s*//;
3856 # check indentation starts on a tab stop
3857 if ($perl_version_ok &&
3858 $sline =~ /^\+\t+( +)(?:$c90_Keywords\b|\{\s*$|\}\s*(?:else\b|while\b|\s*$)|$Declare\s*$Ident\s*[;=])/) {
3859 my $indent = length($1);
3860 if ($indent % $tabsize) {
3862 "Statements should start on a tabstop\n" . $herecurr) &&
3864 $fixed[$fixlinenr] =~ s@(^\+\t+) +@$1 . "\t" x ($indent/$tabsize)@e;
3869 # check multi-line statement indentation matches previous line
3870 if ($perl_version_ok &&
3871 $prevline =~ /^\+([ \t]*)((?:$c90_Keywords(?:\s+if)\s*)|(?:$Declare\s*)?(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*|(?:\*\s*)*$Lval\s*=\s*$Ident\s*)\(.*(\&\&|\|\||,)\s*$/) {
3872 $prevline =~ /^\+(\t*)(.*)$/;
3876 my $pos = pos_last_openparen($rest);
3878 $line =~ /^(\+| )([ \t]*)/;
3881 my $goodtabindent = $oldindent .
3882 "\t" x ($pos / $tabsize) .
3883 " " x ($pos % $tabsize);
3884 my $goodspaceindent = $oldindent . " " x $pos;
3886 if ($newindent ne $goodtabindent &&
3887 $newindent ne $goodspaceindent) {
3889 if (CHK("PARENTHESIS_ALIGNMENT",
3890 "Alignment should match open parenthesis\n" . $hereprev) &&
3891 $fix && $line =~ /^\+/) {
3892 $fixed[$fixlinenr] =~
3893 s/^\+[ \t]*/\+$goodtabindent/;
3899 # check for space after cast like "(int) foo" or "(struct foo) bar"
3900 # avoid checking a few false positives:
3901 # "sizeof(<type>)" or "__alignof__(<type>)"
3902 # function pointer declarations like "(*foo)(int) = bar;"
3903 # structure definitions like "(struct foo) { 0 };"
3904 # multiline macros that define functions
3905 # known attributes or the __attribute__ keyword
3906 if ($line =~ /^\+(.*)\(\s*$Type\s*\)([ \t]++)((?![={]|\\$|$Attribute|__attribute__))/ &&
3907 (!defined($1) || $1 !~ /\b(?:sizeof|__alignof__)\s*$/)) {
3909 "No space is necessary after a cast\n" . $herecurr) &&
3911 $fixed[$fixlinenr] =~
3912 s/(\(\s*$Type\s*\))[ \t]+/$1/;
3916 # Block comment styles
3917 # Networking with an initial /*
3918 if ($realfile =~ m@^(drivers/net/|net/)@ &&
3919 $prevrawline =~ /^\+[ \t]*\/\*[ \t]*$/ &&
3920 $rawline =~ /^\+[ \t]*\*/ &&
3921 $realline > 3) { # Do not warn about the initial copyright comment block after SPDX-License-Identifier
3922 WARN("NETWORKING_BLOCK_COMMENT_STYLE",
3923 "networking block comments don't use an empty /* line, use /* Comment...\n" . $hereprev);
3926 # Block comments use * on subsequent lines
3927 if ($prevline =~ /$;[ \t]*$/ && #ends in comment
3928 $prevrawline =~ /^\+.*?\/\*/ && #starting /*
3929 $prevrawline !~ /\*\/[ \t]*$/ && #no trailing */
3930 $rawline =~ /^\+/ && #line is new
3931 $rawline !~ /^\+[ \t]*\*/) { #no leading *
3932 WARN("BLOCK_COMMENT_STYLE",
3933 "Block comments use * on subsequent lines\n" . $hereprev);
3936 # Block comments use */ on trailing lines
3937 if ($rawline !~ m@^\+[ \t]*\*/[ \t]*$@ && #trailing */
3938 $rawline !~ m@^\+.*/\*.*\*/[ \t]*$@ && #inline /*...*/
3939 $rawline !~ m@^\+.*\*{2,}/[ \t]*$@ && #trailing **/
3940 $rawline =~ m@^\+[ \t]*.+\*\/[ \t]*$@) { #non blank */
3941 WARN("BLOCK_COMMENT_STYLE",
3942 "Block comments use a trailing */ on a separate line\n" . $herecurr);
3945 # Block comment * alignment
3946 if ($prevline =~ /$;[ \t]*$/ && #ends in comment
3947 $line =~ /^\+[ \t]*$;/ && #leading comment
3948 $rawline =~ /^\+[ \t]*\*/ && #leading *
3949 (($prevrawline =~ /^\+.*?\/\*/ && #leading /*
3950 $prevrawline !~ /\*\/[ \t]*$/) || #no trailing */
3951 $prevrawline =~ /^\+[ \t]*\*/)) { #leading *
3953 $prevrawline =~ m@^\+([ \t]*/?)\*@;
3955 $oldindent = expand_tabs($1);
3957 $prevrawline =~ m@^\+(.*/?)\*@;
3958 $oldindent = expand_tabs($1);
3960 $rawline =~ m@^\+([ \t]*)\*@;
3962 $newindent = expand_tabs($newindent);
3963 if (length($oldindent) ne length($newindent)) {
3964 WARN("BLOCK_COMMENT_STYLE",
3965 "Block comments should align the * on each line\n" . $hereprev);
3969 # check for missing blank lines after struct/union declarations
3970 # with exceptions for various attributes and macros
3971 if ($prevline =~ /^[\+ ]};?\s*$/ &&
3973 !($line =~ /^\+\s*$/ ||
3974 $line =~ /^\+\s*(?:EXPORT_SYMBOL|early_param)/ ||
3975 $line =~ /^\+\s*MODULE_/i ||
3976 $line =~ /^\+\s*\#\s*(?:end|elif|else)/ ||
3977 $line =~ /^\+[a-z_]*init/ ||
3978 $line =~ /^\+\s*(?:static\s+)?[A-Z_]*ATTR/ ||
3979 $line =~ /^\+\s*DECLARE/ ||
3980 $line =~ /^\+\s*builtin_[\w_]*driver/ ||
3981 $line =~ /^\+\s*__setup/)) {
3982 if (CHK("LINE_SPACING",
3983 "Please use a blank line after function/struct/union/enum declarations\n" . $hereprev) &&
3985 fix_insert_line($fixlinenr, "\+");
3989 # check for multiple consecutive blank lines
3990 if ($prevline =~ /^[\+ ]\s*$/ &&
3991 $line =~ /^\+\s*$/ &&
3992 $last_blank_line != ($linenr - 1)) {
3993 if (CHK("LINE_SPACING",
3994 "Please don't use multiple blank lines\n" . $hereprev) &&
3996 fix_delete_line($fixlinenr, $rawline);
3999 $last_blank_line = $linenr;
4002 # check for missing blank lines after declarations
4003 # (declarations must have the same indentation and not be at the start of line)
4004 if (($prevline =~ /\+(\s+)\S/) && $sline =~ /^\+$1\S/) {
4008 # remove $Attribute/$Sparse uses to simplify comparisons
4009 $sl =~ s/\b(?:$Attribute|$Sparse)\b//g;
4010 $pl =~ s/\b(?:$Attribute|$Sparse)\b//g;
4011 if (($pl =~ /^\+\s+$Declare\s*$Ident\s*[=,;:\[]/ ||
4012 # function pointer declarations
4013 $pl =~ /^\+\s+$Declare\s*\(\s*\*\s*$Ident\s*\)\s*[=,;:\[\(]/ ||
4014 # foo bar; where foo is some local typedef or #define
4015 $pl =~ /^\+\s+$Ident(?:\s+|\s*\*\s*)$Ident\s*[=,;\[]/ ||
4016 # known declaration macros
4017 $pl =~ /^\+\s+$declaration_macros/) &&
4018 # for "else if" which can look like "$Ident $Ident"
4019 !($pl =~ /^\+\s+$c90_Keywords\b/ ||
4020 # other possible extensions of declaration lines
4021 $pl =~ /(?:$Compare|$Assignment|$Operators)\s*$/ ||
4022 # not starting a section or a macro "\" extended line
4023 $pl =~ /(?:\{\s*|\\)$/) &&
4024 # looks like a declaration
4025 !($sl =~ /^\+\s+$Declare\s*$Ident\s*[=,;:\[]/ ||
4026 # function pointer declarations
4027 $sl =~ /^\+\s+$Declare\s*\(\s*\*\s*$Ident\s*\)\s*[=,;:\[\(]/ ||
4028 # foo bar; where foo is some local typedef or #define
4029 $sl =~ /^\+\s+$Ident(?:\s+|\s*\*\s*)$Ident\s*[=,;\[]/ ||
4030 # known declaration macros
4031 $sl =~ /^\+\s+$declaration_macros/ ||
4032 # start of struct or union or enum
4033 $sl =~ /^\+\s+(?:static\s+)?(?:const\s+)?(?:union|struct|enum|typedef)\b/ ||
4034 # start or end of block or continuation of declaration
4035 $sl =~ /^\+\s+(?:$|[\{\}\.\#\"\?\:\(\[])/ ||
4036 # bitfield continuation
4037 $sl =~ /^\+\s+$Ident\s*:\s*\d+\s*[,;]/ ||
4038 # other possible extensions of declaration lines
4039 $sl =~ /^\+\s+\(?\s*(?:$Compare|$Assignment|$Operators)/)) {
4040 if (WARN("LINE_SPACING",
4041 "Missing a blank line after declarations\n" . $hereprev) &&
4043 fix_insert_line($fixlinenr, "\+");
4048 # check for spaces at the beginning of a line.
4050 # 1) within comments
4051 # 2) indented preprocessor commands
4053 if ($rawline =~ /^\+ / && $line !~ /^\+ *(?:$;|#|$Ident:)/) {
4054 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
4055 if (WARN("LEADING_SPACE",
4056 "please, no spaces at the start of a line\n" . $herevet) &&
4058 $fixed[$fixlinenr] =~ s/^\+([ \t]+)/"\+" . tabify($1)/e;
4062 # check we are in a valid C source file if not then ignore this hunk
4063 next if ($realfile !~ /\.(h|c)$/);
4065 # check for unusual line ending [ or (
4066 if ($line =~ /^\+.*([\[\(])\s*$/) {
4067 CHK("OPEN_ENDED_LINE",
4068 "Lines should not end with a '$1'\n" . $herecurr);
4071 # check if this appears to be the start function declaration, save the name
4072 if ($sline =~ /^\+\{\s*$/ &&
4073 $prevline =~ /^\+(?:(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*)?($Ident)\(/) {
4074 $context_function = $1;
4077 # check if this appears to be the end of function declaration
4078 if ($sline =~ /^\+\}\s*$/) {
4079 undef $context_function;
4082 # check indentation of any line with a bare else
4083 # (but not if it is a multiple line "if (foo) return bar; else return baz;")
4084 # if the previous line is a break or return and is indented 1 tab more...
4085 if ($sline =~ /^\+([\t]+)(?:}[ \t]*)?else(?:[ \t]*{)?\s*$/) {
4086 my $tabs = length($1) + 1;
4087 if ($prevline =~ /^\+\t{$tabs,$tabs}break\b/ ||
4088 ($prevline =~ /^\+\t{$tabs,$tabs}return\b/ &&
4089 defined $lines[$linenr] &&
4090 $lines[$linenr] !~ /^[ \+]\t{$tabs,$tabs}return/)) {
4091 WARN("UNNECESSARY_ELSE",
4092 "else is not generally useful after a break or return\n" . $hereprev);
4096 # check indentation of a line with a break;
4097 # if the previous line is a goto, return or break
4098 # and is indented the same # of tabs
4099 if ($sline =~ /^\+([\t]+)break\s*;\s*$/) {
4101 if ($prevline =~ /^\+$tabs(goto|return|break)\b/) {
4102 if (WARN("UNNECESSARY_BREAK",
4103 "break is not useful after a $1\n" . $hereprev) &&
4105 fix_delete_line($fixlinenr, $rawline);
4110 # check for RCS/CVS revision markers
4111 if ($rawline =~ /^\+.*\$(Revision|Log|Id)(?:\$|)/) {
4113 "CVS style keyword markers, these will _not_ be updated\n". $herecurr);
4116 # check for old HOTPLUG __dev<foo> section markings
4117 if ($line =~ /\b(__dev(init|exit)(data|const|))\b/) {
4118 WARN("HOTPLUG_SECTION",
4119 "Using $1 is unnecessary\n" . $herecurr);
4122 # Check for potential 'bare' types
4123 my ($stat, $cond, $line_nr_next, $remain_next, $off_next,
4125 #print "LINE<$line>\n";
4126 if ($linenr > $suppress_statement &&
4127 $realcnt && $sline =~ /.\s*\S/) {
4128 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
4129 ctx_statement_block($linenr, $realcnt, 0);
4130 $stat =~ s/\n./\n /g;
4131 $cond =~ s/\n./\n /g;
4133 #print "linenr<$linenr> <$stat>\n";
4134 # If this statement has no statement boundaries within
4135 # it there is no point in retrying a statement scan
4136 # until we hit end of it.
4137 my $frag = $stat; $frag =~ s/;+\s*$//;
4138 if ($frag !~ /(?:{|;)/) {
4139 #print "skip<$line_nr_next>\n";
4140 $suppress_statement = $line_nr_next;
4143 # Find the real next line.
4144 $realline_next = $line_nr_next;
4145 if (defined $realline_next &&
4146 (!defined $lines[$realline_next - 1] ||
4147 substr($lines[$realline_next - 1], $off_next) =~ /^\s*$/)) {
4154 # Ignore goto labels.
4155 if ($s =~ /$Ident:\*$/s) {
4157 # Ignore functions being called
4158 } elsif ($s =~ /^.\s*$Ident\s*\(/s) {
4160 } elsif ($s =~ /^.\s*else\b/s) {
4162 # declarations always start with types
4163 } elsif ($prev_values eq 'E' && $s =~ /^.\s*(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?((?:\s*$Ident)+?)\b(?:\s+$Sparse)?\s*\**\s*(?:$Ident|\(\*[^\)]*\))(?:\s*$Modifier)?\s*(?:;|=|,|\()/s) {
4166 possible($type, "A:" . $s);
4168 # definitions in global scope can only start with types
4169 } elsif ($s =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b\s*(?!:)/s) {
4170 possible($1, "B:" . $s);
4173 # any (foo ... *) is a pointer cast, and foo is a type
4174 while ($s =~ /\(($Ident)(?:\s+$Sparse)*[\s\*]+\s*\)/sg) {
4175 possible($1, "C:" . $s);
4178 # Check for any sort of function declaration.
4179 # int foo(something bar, other baz);
4180 # void (*store_gdt)(x86_descr_ptr *);
4181 if ($prev_values eq 'E' && $s =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/s) {
4182 my ($name_len) = length($1);
4185 substr($ctx, 0, $name_len + 1, '');
4186 $ctx =~ s/\)[^\)]*$//;
4188 for my $arg (split(/\s*,\s*/, $ctx)) {
4189 if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/s || $arg =~ /^($Ident)$/s) {
4191 possible($1, "D:" . $s);
4199 # Checks which may be anchored in the context.
4202 # Check for switch () and associated case and default
4203 # statements should be at the same indent.
4204 if ($line=~/\bswitch\s*\(.*\)/) {
4207 my @ctx = ctx_block_outer($linenr, $realcnt);
4209 for my $ctx (@ctx) {
4210 my ($clen, $cindent) = line_stats($ctx);
4211 if ($ctx =~ /^\+\s*(case\s+|default:)/ &&
4212 $indent != $cindent) {
4213 $err .= "$sep$ctx\n";
4220 ERROR("SWITCH_CASE_INDENT_LEVEL",
4221 "switch and case should be at the same indent\n$hereline$err");
4225 # if/while/etc brace do not go on next line, unless defining a do while loop,
4226 # or if that brace on the next line is for something else
4227 if ($line =~ /(.*)\b((?:if|while|for|switch|(?:[a-z_]+|)for_each[a-z_]+)\s*\(|do\b|else\b)/ && $line !~ /^.\s*\#/) {
4228 my $pre_ctx = "$1$2";
4230 my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0);
4232 if ($line =~ /^\+\t{6,}/) {
4233 WARN("DEEP_INDENTATION",
4234 "Too many leading tabs - consider code refactoring\n" . $herecurr);
4237 my $ctx_cnt = $realcnt - $#ctx - 1;
4238 my $ctx = join("\n", @ctx);
4240 my $ctx_ln = $linenr;
4241 my $ctx_skip = $realcnt;
4243 while ($ctx_skip > $ctx_cnt || ($ctx_skip == $ctx_cnt &&
4244 defined $lines[$ctx_ln - 1] &&
4245 $lines[$ctx_ln - 1] =~ /^-/)) {
4246 ##print "SKIP<$ctx_skip> CNT<$ctx_cnt>\n";
4247 $ctx_skip-- if (!defined $lines[$ctx_ln - 1] || $lines[$ctx_ln - 1] !~ /^-/);
4251 #print "realcnt<$realcnt> ctx_cnt<$ctx_cnt>\n";
4252 #print "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n";
4254 if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln - 1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
4256 "that open brace { should be on the previous line\n" .
4257 "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
4259 if ($level == 0 && $pre_ctx !~ /}\s*while\s*\($/ &&
4260 $ctx =~ /\)\s*\;\s*$/ &&
4261 defined $lines[$ctx_ln - 1])
4263 my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]);
4264 if ($nindent > $indent) {
4265 WARN("TRAILING_SEMICOLON",
4266 "trailing semicolon indicates no statements, indent implies otherwise\n" .
4267 "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
4272 # Check relative indent for conditionals and blocks.
4273 if ($line =~ /\b(?:(?:if|while|for|(?:[a-z_]+|)for_each[a-z_]+)\s*\(|(?:do|else)\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) {
4274 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
4275 ctx_statement_block($linenr, $realcnt, 0)
4276 if (!defined $stat);
4277 my ($s, $c) = ($stat, $cond);
4279 substr($s, 0, length($c), '');
4281 # remove inline comments
4285 # Find out how long the conditional actually is.
4286 my @newlines = ($c =~ /\n/gs);
4287 my $cond_lines = 1 + $#newlines;
4289 # Make sure we remove the line prefixes as we have
4290 # none on the first line, and are going to readd them
4293 while ($s =~ /\n\s+\\\n/) {
4294 $cond_lines += $s =~ s/\n\s+\\\n/\n/g;
4297 # We want to check the first line inside the block
4298 # starting at the end of the conditional, so remove:
4299 # 1) any blank line termination
4300 # 2) any opening brace { on end of the line
4302 my $continuation = 0;
4304 $s =~ s/^.*\bdo\b//;
4306 if ($s =~ s/^\s*\\//) {
4309 if ($s =~ s/^\s*?\n//) {
4314 # Also ignore a loop construct at the end of a
4315 # preprocessor statement.
4316 if (($prevline =~ /^.\s*#\s*define\s/ ||
4317 $prevline =~ /\\\s*$/) && $continuation == 0) {
4323 while ($cond_ptr != $cond_lines) {
4324 $cond_ptr = $cond_lines;
4326 # If we see an #else/#elif then the code
4328 if ($s =~ /^\s*\#\s*(?:else|elif)/) {
4333 # 1) blank lines, they should be at 0,
4334 # 2) preprocessor lines, and
4336 if ($continuation ||
4338 $s =~ /^\s*#\s*?/ ||
4339 $s =~ /^\s*$Ident\s*:/) {
4340 $continuation = ($s =~ /^.*?\\\n/) ? 1 : 0;
4341 if ($s =~ s/^.*?\n//) {
4347 my (undef, $sindent) = line_stats("+" . $s);
4348 my $stat_real = raw_line($linenr, $cond_lines);
4350 # Check if either of these lines are modified, else
4351 # this is not this patch's fault.
4352 if (!defined($stat_real) ||
4353 $stat !~ /^\+/ && $stat_real !~ /^\+/) {
4356 if (defined($stat_real) && $cond_lines > 1) {
4357 $stat_real = "[...]\n$stat_real";
4360 #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";
4362 if ($check && $s ne '' &&
4363 (($sindent % $tabsize) != 0 ||
4364 ($sindent < $indent) ||
4365 ($sindent == $indent &&
4366 ($s !~ /^\s*(?:\}|\{|else\b)/)) ||
4367 ($sindent > $indent + $tabsize))) {
4368 WARN("SUSPECT_CODE_INDENT",
4369 "suspect code indent for conditional statements ($indent, $sindent)\n" . $herecurr . "$stat_real\n");
4373 # Track the 'values' across context and added lines.
4374 my $opline = $line; $opline =~ s/^./ /;
4375 my ($curr_values, $curr_vars) =
4376 annotate_values($opline . "\n", $prev_values);
4377 $curr_values = $prev_values . $curr_values;
4379 my $outline = $opline; $outline =~ s/\t/ /g;
4380 print "$linenr > .$outline\n";
4381 print "$linenr > $curr_values\n";
4382 print "$linenr > $curr_vars\n";
4384 $prev_values = substr($curr_values, -1);
4386 #ignore lines not being added
4387 next if ($line =~ /^[^\+]/);
4389 # check for self assignments used to avoid compiler warnings
4390 # e.g.: int foo = foo, *bar = NULL;
4391 # struct foo bar = *(&(bar));
4392 if ($line =~ /^\+\s*(?:$Declare)?([A-Za-z_][A-Za-z\d_]*)\s*=/) {
4394 if ($line =~ /^\+\s*(?:$Declare)?$var\s*=\s*(?:$var|\*\s*\(?\s*&\s*\(?\s*$var\s*\)?\s*\)?)\s*[;,]/) {
4395 WARN("SELF_ASSIGNMENT",
4396 "Do not use self-assignments to avoid compiler warnings\n" . $herecurr);
4400 # check for dereferences that span multiple lines
4401 if ($prevline =~ /^\+.*$Lval\s*(?:\.|->)\s*$/ &&
4402 $line =~ /^\+\s*(?!\#\s*(?!define\s+|if))\s*$Lval/) {
4403 $prevline =~ /($Lval\s*(?:\.|->))\s*$/;
4405 $line =~ /^.\s*($Lval)/;
4408 WARN("MULTILINE_DEREFERENCE",
4409 "Avoid multiple line dereference - prefer '$ref'\n" . $hereprev);
4412 # check for declarations of signed or unsigned without int
4413 while ($line =~ m{\b($Declare)\s*(?!char\b|short\b|int\b|long\b)\s*($Ident)?\s*[=,;\[\)\(]}g) {
4416 $var = "" if (!defined $var);
4417 if ($type =~ /^(?:(?:$Storage|$Inline|$Attribute)\s+)*((?:un)?signed)((?:\s*\*)*)\s*$/) {
4421 $pointer = "" if (!defined $pointer);
4423 if (WARN("UNSPECIFIED_INT",
4424 "Prefer '" . trim($sign) . " int" . rtrim($pointer) . "' to bare use of '$sign" . rtrim($pointer) . "'\n" . $herecurr) &&
4426 my $decl = trim($sign) . " int ";
4427 my $comp_pointer = $pointer;
4428 $comp_pointer =~ s/\s//g;
4429 $decl .= $comp_pointer;
4430 $decl = rtrim($decl) if ($var eq "");
4431 $fixed[$fixlinenr] =~ s@\b$sign\s*\Q$pointer\E\s*$var\b@$decl$var@;
4436 # TEST: allow direct testing of the type matcher.
4438 if ($line =~ /^.\s*$Declare\s*$/) {
4440 "TEST: is type\n" . $herecurr);
4441 } elsif ($dbg_type > 1 && $line =~ /^.+($Declare)/) {
4442 ERROR("TEST_NOT_TYPE",
4443 "TEST: is not type ($1 is)\n". $herecurr);
4447 # TEST: allow direct testing of the attribute matcher.
4449 if ($line =~ /^.\s*$Modifier\s*$/) {
4451 "TEST: is attr\n" . $herecurr);
4452 } elsif ($dbg_attr > 1 && $line =~ /^.+($Modifier)/) {
4453 ERROR("TEST_NOT_ATTR",
4454 "TEST: is not attr ($1 is)\n". $herecurr);
4459 # check for initialisation to aggregates open brace on the next line
4460 if ($line =~ /^.\s*{/ &&
4461 $prevline =~ /(?:^|[^=])=\s*$/) {
4462 if (ERROR("OPEN_BRACE",
4463 "that open brace { should be on the previous line\n" . $hereprev) &&
4464 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
4465 fix_delete_line($fixlinenr - 1, $prevrawline);
4466 fix_delete_line($fixlinenr, $rawline);
4467 my $fixedline = $prevrawline;
4468 $fixedline =~ s/\s*=\s*$/ = {/;
4469 fix_insert_line($fixlinenr, $fixedline);
4471 $fixedline =~ s/^(.\s*)\{\s*/$1/;
4472 fix_insert_line($fixlinenr, $fixedline);
4477 # Checks which are anchored on the added line.
4480 # check for malformed paths in #include statements (uses RAW line)
4481 if ($rawline =~ m{^.\s*\#\s*include\s+[<"](.*)[">]}) {
4483 if ($path =~ m{//}) {
4484 ERROR("MALFORMED_INCLUDE",
4485 "malformed #include filename\n" . $herecurr);
4487 if ($path =~ "^uapi/" && $realfile =~ m@\binclude/uapi/@) {
4488 ERROR("UAPI_INCLUDE",
4489 "No #include in ...include/uapi/... should use a uapi/ path prefix\n" . $herecurr);
4493 # no C99 // comments
4494 if ($line =~ m{//}) {
4495 if (ERROR("C99_COMMENTS",
4496 "do not use C99 // comments\n" . $herecurr) &&
4498 my $line = $fixed[$fixlinenr];
4499 if ($line =~ /\/\/(.*)$/) {
4500 my $comment = trim($1);
4501 $fixed[$fixlinenr] =~ s@\/\/(.*)$@/\* $comment \*/@;
4505 # Remove C99 comments.
4507 $opline =~ s@//.*@@;
4509 # EXPORT_SYMBOL should immediately follow the thing it is exporting, consider
4510 # the whole statement.
4511 #print "APW <$lines[$realline_next - 1]>\n";
4512 if (defined $realline_next &&
4513 exists $lines[$realline_next - 1] &&
4514 !defined $suppress_export{$realline_next} &&
4515 ($lines[$realline_next - 1] =~ /EXPORT_SYMBOL.*\((.*)\)/)) {
4516 # Handle definitions which produce identifiers with
4519 # EXPORT_SYMBOL(something_foo);
4521 $name =~ s/^\s*($Ident).*/$1/;
4522 if ($stat =~ /^(?:.\s*}\s*\n)?.([A-Z_]+)\s*\(\s*($Ident)/ &&
4523 $name =~ /^${Ident}_$2/) {
4524 #print "FOO C name<$name>\n";
4525 $suppress_export{$realline_next} = 1;
4527 } elsif ($stat !~ /(?:
4529 ^.DEFINE_$Ident\(\Q$name\E\)|
4530 ^.DECLARE_$Ident\(\Q$name\E\)|
4531 ^.LIST_HEAD\(\Q$name\E\)|
4532 ^.(?:$Storage\s+)?$Type\s*\(\s*\*\s*\Q$name\E\s*\)\s*\(|
4533 \b\Q$name\E(?:\s+$Attribute)*\s*(?:;|=|\[|\()
4535 #print "FOO A<$lines[$realline_next - 1]> stat<$stat> name<$name>\n";
4536 $suppress_export{$realline_next} = 2;
4538 $suppress_export{$realline_next} = 1;
4541 if (!defined $suppress_export{$linenr} &&
4542 $prevline =~ /^.\s*$/ &&
4543 ($line =~ /EXPORT_SYMBOL.*\((.*)\)/)) {
4544 #print "FOO B <$lines[$linenr - 1]>\n";
4545 $suppress_export{$linenr} = 2;
4547 if (defined $suppress_export{$linenr} &&
4548 $suppress_export{$linenr} == 2) {
4549 WARN("EXPORT_SYMBOL",
4550 "EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
4553 # check for global initialisers.
4554 if ($line =~ /^\+$Type\s*$Ident(?:\s+$Modifier)*\s*=\s*($zero_initializer)\s*;/ &&
4555 !exclude_global_initialisers($realfile)) {
4556 if (ERROR("GLOBAL_INITIALISERS",
4557 "do not initialise globals to $1\n" . $herecurr) &&
4559 $fixed[$fixlinenr] =~ s/(^.$Type\s*$Ident(?:\s+$Modifier)*)\s*=\s*$zero_initializer\s*;/$1;/;
4562 # check for static initialisers.
4563 if ($line =~ /^\+.*\bstatic\s.*=\s*($zero_initializer)\s*;/) {
4564 if (ERROR("INITIALISED_STATIC",
4565 "do not initialise statics to $1\n" .
4568 $fixed[$fixlinenr] =~ s/(\bstatic\s.*?)\s*=\s*$zero_initializer\s*;/$1;/;
4572 # check for misordered declarations of char/short/int/long with signed/unsigned
4573 while ($sline =~ m{(\b$TypeMisordered\b)}g) {
4575 WARN("MISORDERED_TYPE",
4576 "type '$tmp' should be specified in [[un]signed] [short|int|long|long long] order\n" . $herecurr);
4579 # check for unnecessary <signed> int declarations of short/long/long long
4580 while ($sline =~ m{\b($TypeMisordered(\s*\*)*|$C90_int_types)\b}g) {
4581 my $type = trim($1);
4582 next if ($type !~ /\bint\b/);
4583 next if ($type !~ /\b(?:short|long\s+long|long)\b/);
4584 my $new_type = $type;
4585 $new_type =~ s/\b\s*int\s*\b/ /;
4586 $new_type =~ s/\b\s*(?:un)?signed\b\s*/ /;
4587 $new_type =~ s/^const\s+//;
4588 $new_type = "unsigned $new_type" if ($type =~ /\bunsigned\b/);
4589 $new_type = "const $new_type" if ($type =~ /^const\b/);
4590 $new_type =~ s/\s+/ /g;
4591 $new_type = trim($new_type);
4592 if (WARN("UNNECESSARY_INT",
4593 "Prefer '$new_type' over '$type' as the int is unnecessary\n" . $herecurr) &&
4595 $fixed[$fixlinenr] =~ s/\b\Q$type\E\b/$new_type/;
4599 # check for static const char * arrays.
4600 if ($line =~ /\bstatic\s+const\s+char\s*\*\s*(\w+)\s*\[\s*\]\s*=\s*/) {
4601 WARN("STATIC_CONST_CHAR_ARRAY",
4602 "static const char * array should probably be static const char * const\n" .
4606 # check for initialized const char arrays that should be static const
4607 if ($line =~ /^\+\s*const\s+(char|unsigned\s+char|_*u8|(?:[us]_)?int8_t)\s+\w+\s*\[\s*(?:\w+\s*)?\]\s*=\s*"/) {
4608 if (WARN("STATIC_CONST_CHAR_ARRAY",
4609 "const array should probably be static const\n" . $herecurr) &&
4611 $fixed[$fixlinenr] =~ s/(^.\s*)const\b/${1}static const/;
4615 # check for static char foo[] = "bar" declarations.
4616 if ($line =~ /\bstatic\s+char\s+(\w+)\s*\[\s*\]\s*=\s*"/) {
4617 WARN("STATIC_CONST_CHAR_ARRAY",
4618 "static char array declaration should probably be static const char\n" .
4622 # check for const <foo> const where <foo> is not a pointer or array type
4623 if ($sline =~ /\bconst\s+($BasicType)\s+const\b/) {
4625 if ($sline =~ /\bconst\s+\Q$found\E\s+const\b\s*\*/) {
4627 "'const $found const *' should probably be 'const $found * const'\n" . $herecurr);
4628 } elsif ($sline !~ /\bconst\s+\Q$found\E\s+const\s+\w+\s*\[/) {
4630 "'const $found const' should probably be 'const $found'\n" . $herecurr);
4634 # check for const static or static <non ptr type> const declarations
4635 # prefer 'static const <foo>' over 'const static <foo>' and 'static <foo> const'
4636 if ($sline =~ /^\+\s*const\s+static\s+($Type)\b/ ||
4637 $sline =~ /^\+\s*static\s+($BasicType)\s+const\b/) {
4638 if (WARN("STATIC_CONST",
4639 "Move const after static - use 'static const $1'\n" . $herecurr) &&
4641 $fixed[$fixlinenr] =~ s/\bconst\s+static\b/static const/;
4642 $fixed[$fixlinenr] =~ s/\bstatic\s+($BasicType)\s+const\b/static const $1/;
4646 # check for non-global char *foo[] = {"bar", ...} declarations.
4647 if ($line =~ /^.\s+(?:static\s+|const\s+)?char\s+\*\s*\w+\s*\[\s*\]\s*=\s*\{/) {
4648 WARN("STATIC_CONST_CHAR_ARRAY",
4649 "char * array declaration might be better as static const\n" .
4653 # check for sizeof(foo)/sizeof(foo[0]) that could be ARRAY_SIZE(foo)
4654 if ($line =~ m@\bsizeof\s*\(\s*($Lval)\s*\)@) {
4656 if ($line =~ m@\b(sizeof\s*\(\s*\Q$array\E\s*\)\s*/\s*sizeof\s*\(\s*\Q$array\E\s*\[\s*0\s*\]\s*\))@) {
4658 if (WARN("ARRAY_SIZE",
4659 "Prefer ARRAY_SIZE($array)\n" . $herecurr) &&
4661 $fixed[$fixlinenr] =~ s/\Q$array_div\E/ARRAY_SIZE($array)/;
4666 # check for function declarations without arguments like "int foo()"
4667 if ($line =~ /(\b$Type\s*$Ident)\s*\(\s*\)/) {
4668 if (ERROR("FUNCTION_WITHOUT_ARGS",
4669 "Bad function definition - $1() should probably be $1(void)\n" . $herecurr) &&
4671 $fixed[$fixlinenr] =~ s/(\b($Type)\s+($Ident))\s*\(\s*\)/$2 $3(void)/;
4675 # check for new typedefs, only function parameters and sparse annotations
4677 if ($line =~ /\btypedef\s/ &&
4678 $line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ &&
4679 $line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ &&
4680 $line !~ /\b$typeTypedefs\b/ &&
4681 $line !~ /\b__bitwise\b/) {
4682 WARN("NEW_TYPEDEFS",
4683 "do not add new typedefs\n" . $herecurr);
4686 # * goes on variable not on type
4688 while ($line =~ m{(\($NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)\))}g) {
4690 my ($ident, $from, $to) = ($1, $2, $2);
4692 # Should start with a space.
4693 $to =~ s/^(\S)/ $1/;
4694 # Should not end with a space.
4696 # '*'s should not have spaces between.
4697 while ($to =~ s/\*\s+\*/\*\*/) {
4700 ## print "1: from<$from> to<$to> ident<$ident>\n";
4702 if (ERROR("POINTER_LOCATION",
4703 "\"(foo$from)\" should be \"(foo$to)\"\n" . $herecurr) &&
4705 my $sub_from = $ident;
4706 my $sub_to = $ident;
4707 $sub_to =~ s/\Q$from\E/$to/;
4708 $fixed[$fixlinenr] =~
4709 s@\Q$sub_from\E@$sub_to@;
4713 while ($line =~ m{(\b$NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)($Ident))}g) {
4715 my ($match, $from, $to, $ident) = ($1, $2, $2, $3);
4717 # Should start with a space.
4718 $to =~ s/^(\S)/ $1/;
4719 # Should not end with a space.
4721 # '*'s should not have spaces between.
4722 while ($to =~ s/\*\s+\*/\*\*/) {
4724 # Modifiers should have spaces.
4725 $to =~ s/(\b$Modifier$)/$1 /;
4727 ## print "2: from<$from> to<$to> ident<$ident>\n";
4728 if ($from ne $to && $ident !~ /^$Modifier$/) {
4729 if (ERROR("POINTER_LOCATION",
4730 "\"foo${from}bar\" should be \"foo${to}bar\"\n" . $herecurr) &&
4733 my $sub_from = $match;
4734 my $sub_to = $match;
4735 $sub_to =~ s/\Q$from\E/$to/;
4736 $fixed[$fixlinenr] =~
4737 s@\Q$sub_from\E@$sub_to@;
4742 # avoid BUG() or BUG_ON()
4743 if ($line =~ /\b(?:BUG|BUG_ON)\b/) {
4744 my $msg_level = \&WARN;
4745 $msg_level = \&CHK if ($file);
4746 &{$msg_level}("AVOID_BUG",
4747 "Avoid crashing the kernel - try using WARN_ON & recovery code rather than BUG() or BUG_ON()\n" . $herecurr);
4750 # avoid LINUX_VERSION_CODE
4751 if ($line =~ /\bLINUX_VERSION_CODE\b/) {
4752 WARN("LINUX_VERSION_CODE",
4753 "LINUX_VERSION_CODE should be avoided, code should be for the version to which it is merged\n" . $herecurr);
4756 # check for uses of printk_ratelimit
4757 if ($line =~ /\bprintk_ratelimit\s*\(/) {
4758 WARN("PRINTK_RATELIMITED",
4759 "Prefer printk_ratelimited or pr_<level>_ratelimited to printk_ratelimit\n" . $herecurr);
4762 # printk should use KERN_* levels
4763 if ($line =~ /\bprintk\s*\(\s*(?!KERN_[A-Z]+\b)/) {
4764 WARN("PRINTK_WITHOUT_KERN_LEVEL",
4765 "printk() should include KERN_<LEVEL> facility level\n" . $herecurr);
4768 # prefer variants of (subsystem|netdev|dev|pr)_<level> to printk(KERN_<LEVEL>
4769 if ($line =~ /\b(printk(_once|_ratelimited)?)\s*\(\s*KERN_([A-Z]+)/) {
4773 $modifier = "" if (!defined($modifier));
4774 my $level = lc($orig);
4775 $level = "warn" if ($level eq "warning");
4776 my $level2 = $level;
4777 $level2 = "dbg" if ($level eq "debug");
4778 $level .= $modifier;
4779 $level2 .= $modifier;
4780 WARN("PREFER_PR_LEVEL",
4781 "Prefer [subsystem eg: netdev]_$level2([subsystem]dev, ... then dev_$level2(dev, ... then pr_$level(... to $printk(KERN_$orig ...\n" . $herecurr);
4784 # prefer dev_<level> to dev_printk(KERN_<LEVEL>
4785 if ($line =~ /\bdev_printk\s*\(\s*KERN_([A-Z]+)/) {
4787 my $level = lc($orig);
4788 $level = "warn" if ($level eq "warning");
4789 $level = "dbg" if ($level eq "debug");
4790 WARN("PREFER_DEV_LEVEL",
4791 "Prefer dev_$level(... to dev_printk(KERN_$orig, ...\n" . $herecurr);
4794 # trace_printk should not be used in production code.
4795 if ($line =~ /\b(trace_printk|trace_puts|ftrace_vprintk)\s*\(/) {
4796 WARN("TRACE_PRINTK",
4797 "Do not use $1() in production code (this can be ignored if built only with a debug config option)\n" . $herecurr);
4800 # ENOSYS means "bad syscall nr" and nothing else. This will have a small
4801 # number of false positives, but assembly files are not checked, so at
4802 # least the arch entry code will not trigger this warning.
4803 if ($line =~ /\bENOSYS\b/) {
4805 "ENOSYS means 'invalid syscall nr' and nothing else\n" . $herecurr);
4808 # ENOTSUPP is not a standard error code and should be avoided in new patches.
4809 # Folks usually mean EOPNOTSUPP (also called ENOTSUP), when they type ENOTSUPP.
4810 # Similarly to ENOSYS warning a small number of false positives is expected.
4811 if (!$file && $line =~ /\bENOTSUPP\b/) {
4812 if (WARN("ENOTSUPP",
4813 "ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP\n" . $herecurr) &&
4815 $fixed[$fixlinenr] =~ s/\bENOTSUPP\b/EOPNOTSUPP/;
4819 # function brace can't be on same line, except for #defines of do while,
4820 # or if closed on same line
4821 if ($perl_version_ok &&
4822 $sline =~ /$Type\s*$Ident\s*$balanced_parens\s*\{/ &&
4823 $sline !~ /\#\s*define\b.*do\s*\{/ &&
4825 if (ERROR("OPEN_BRACE",
4826 "open brace '{' following function definitions go on the next line\n" . $herecurr) &&
4828 fix_delete_line($fixlinenr, $rawline);
4829 my $fixed_line = $rawline;
4830 $fixed_line =~ /(^..*$Type\s*$Ident\(.*\)\s*)\{(.*)$/;
4833 fix_insert_line($fixlinenr, ltrim($line1));
4834 fix_insert_line($fixlinenr, "\+{");
4835 if ($line2 !~ /^\s*$/) {
4836 fix_insert_line($fixlinenr, "\+\t" . trim($line2));
4841 # open braces for enum, union and struct go on the same line.
4842 if ($line =~ /^.\s*{/ &&
4843 $prevline =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?\s*$/) {
4844 if (ERROR("OPEN_BRACE",
4845 "open brace '{' following $1 go on the same line\n" . $hereprev) &&
4846 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
4847 fix_delete_line($fixlinenr - 1, $prevrawline);
4848 fix_delete_line($fixlinenr, $rawline);
4849 my $fixedline = rtrim($prevrawline) . " {";
4850 fix_insert_line($fixlinenr, $fixedline);
4851 $fixedline = $rawline;
4852 $fixedline =~ s/^(.\s*)\{\s*/$1\t/;
4853 if ($fixedline !~ /^\+\s*$/) {
4854 fix_insert_line($fixlinenr, $fixedline);
4859 # missing space after union, struct or enum definition
4860 if ($line =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident){1,2}[=\{]/) {
4862 "missing space after $1 definition\n" . $herecurr) &&
4864 $fixed[$fixlinenr] =~
4865 s/^(.\s*(?:typedef\s+)?(?:enum|union|struct)(?:\s+$Ident){1,2})([=\{])/$1 $2/;
4869 # Function pointer declarations
4870 # check spacing between type, funcptr, and args
4871 # canonical declaration is "type (*funcptr)(args...)"
4872 if ($line =~ /^.\s*($Declare)\((\s*)\*(\s*)($Ident)(\s*)\)(\s*)\(/) {
4874 my $pre_pointer_space = $2;
4875 my $post_pointer_space = $3;
4877 my $post_funcname_space = $5;
4878 my $pre_args_space = $6;
4880 # the $Declare variable will capture all spaces after the type
4881 # so check it for a missing trailing missing space but pointer return types
4882 # don't need a space so don't warn for those.
4883 my $post_declare_space = "";
4884 if ($declare =~ /(\s+)$/) {
4885 $post_declare_space = $1;
4886 $declare = rtrim($declare);
4888 if ($declare !~ /\*$/ && $post_declare_space =~ /^$/) {
4890 "missing space after return type\n" . $herecurr);
4891 $post_declare_space = " ";
4894 # unnecessary space "type (*funcptr)(args...)"
4895 # This test is not currently implemented because these declarations are
4897 # int foo(int bar, ...)
4898 # and this is form shouldn't/doesn't generate a checkpatch warning.
4900 # elsif ($declare =~ /\s{2,}$/) {
4902 # "Multiple spaces after return type\n" . $herecurr);
4905 # unnecessary space "type ( *funcptr)(args...)"
4906 if (defined $pre_pointer_space &&
4907 $pre_pointer_space =~ /^\s/) {
4909 "Unnecessary space after function pointer open parenthesis\n" . $herecurr);
4912 # unnecessary space "type (* funcptr)(args...)"
4913 if (defined $post_pointer_space &&
4914 $post_pointer_space =~ /^\s/) {
4916 "Unnecessary space before function pointer name\n" . $herecurr);
4919 # unnecessary space "type (*funcptr )(args...)"
4920 if (defined $post_funcname_space &&
4921 $post_funcname_space =~ /^\s/) {
4923 "Unnecessary space after function pointer name\n" . $herecurr);
4926 # unnecessary space "type (*funcptr) (args...)"
4927 if (defined $pre_args_space &&
4928 $pre_args_space =~ /^\s/) {
4930 "Unnecessary space before function pointer arguments\n" . $herecurr);
4933 if (show_type("SPACING") && $fix) {
4934 $fixed[$fixlinenr] =~
4935 s/^(.\s*)$Declare\s*\(\s*\*\s*$Ident\s*\)\s*\(/$1 . $declare . $post_declare_space . '(*' . $funcname . ')('/ex;
4939 # check for spacing round square brackets; allowed:
4940 # 1. with a type on the left -- int [] a;
4941 # 2. at the beginning of a line for slice initialisers -- [0...10] = 5,
4942 # 3. inside a curly brace -- = { [0...10] = 5 }
4943 while ($line =~ /(.*?\s)\[/g) {
4944 my ($where, $prefix) = ($-[1], $1);
4945 if ($prefix !~ /$Type\s+$/ &&
4946 ($where != 0 || $prefix !~ /^.\s+$/) &&
4947 $prefix !~ /[{,:]\s+$/) {
4948 if (ERROR("BRACKET_SPACE",
4949 "space prohibited before open square bracket '['\n" . $herecurr) &&
4951 $fixed[$fixlinenr] =~
4952 s/^(\+.*?)\s+\[/$1\[/;
4957 # check for spaces between functions and their parentheses.
4958 while ($line =~ /($Ident)\s+\(/g) {
4960 my $ctx_before = substr($line, 0, $-[1]);
4961 my $ctx = "$ctx_before$name";
4963 # Ignore those directives where spaces _are_ permitted.
4965 if|for|while|switch|return|case|
4966 volatile|__volatile__|
4967 __attribute__|format|__extension__|
4970 # cpp #define statements have non-optional spaces, ie
4971 # if there is a space between the name and the open
4972 # parenthesis it is simply not a parameter group.
4973 } elsif ($ctx_before =~ /^.\s*\#\s*define\s*$/) {
4975 # cpp #elif statement condition may start with a (
4976 } elsif ($ctx =~ /^.\s*\#\s*elif\s*$/) {
4978 # If this whole things ends with a type its most
4979 # likely a typedef for a function.
4980 } elsif ($ctx =~ /$Type$/) {
4984 "space prohibited between function name and open parenthesis '('\n" . $herecurr) &&
4986 $fixed[$fixlinenr] =~
4987 s/\b$name\s+\(/$name\(/;
4992 # Check operator spacing.
4993 if (!($line=~/\#\s*include/)) {
4994 my $fixed_line = "";
4998 <<=|>>=|<=|>=|==|!=|
4999 \+=|-=|\*=|\/=|%=|\^=|\|=|&=|
5000 =>|->|<<|>>|<|>|=|!|~|
5001 &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%|
5004 my @elements = split(/($ops|;)/, $opline);
5006 ## print("element count: <" . $#elements . ">\n");
5007 ## foreach my $el (@elements) {
5008 ## print("el: <$el>\n");
5011 my @fix_elements = ();
5014 foreach my $el (@elements) {
5015 push(@fix_elements, substr($rawline, $off, length($el)));
5016 $off += length($el);
5021 my $blank = copy_spacing($opline);
5022 my $last_after = -1;
5024 for (my $n = 0; $n < $#elements; $n += 2) {
5026 my $good = $fix_elements[$n] . $fix_elements[$n + 1];
5028 ## print("n: <$n> good: <$good>\n");
5030 $off += length($elements[$n]);
5032 # Pick up the preceding and succeeding characters.
5033 my $ca = substr($opline, 0, $off);
5035 if (length($opline) >= ($off + length($elements[$n + 1]))) {
5036 $cc = substr($opline, $off + length($elements[$n + 1]));
5038 my $cb = "$ca$;$cc";
5041 $a = 'V' if ($elements[$n] ne '');
5042 $a = 'W' if ($elements[$n] =~ /\s$/);
5043 $a = 'C' if ($elements[$n] =~ /$;$/);
5044 $a = 'B' if ($elements[$n] =~ /(\[|\()$/);
5045 $a = 'O' if ($elements[$n] eq '');
5046 $a = 'E' if ($ca =~ /^\s*$/);
5048 my $op = $elements[$n + 1];
5051 if (defined $elements[$n + 2]) {
5052 $c = 'V' if ($elements[$n + 2] ne '');
5053 $c = 'W' if ($elements[$n + 2] =~ /^\s/);
5054 $c = 'C' if ($elements[$n + 2] =~ /^$;/);
5055 $c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
5056 $c = 'O' if ($elements[$n + 2] eq '');
5057 $c = 'E' if ($elements[$n + 2] =~ /^\s*\\$/);
5062 my $ctx = "${a}x${c}";
5064 my $at = "(ctx:$ctx)";
5066 my $ptr = substr($blank, 0, $off) . "^";
5067 my $hereptr = "$hereline$ptr\n";
5069 # Pull out the value of this operator.
5070 my $op_type = substr($curr_values, $off + 1, 1);
5072 # Get the full operator variant.
5073 my $opv = $op . substr($curr_vars, $off, 1);
5075 # Ignore operators passed as parameters.
5076 if ($op_type ne 'V' &&
5077 $ca =~ /\s$/ && $cc =~ /^\s*[,\)]/) {
5080 # } elsif ($op =~ /^$;+$/) {
5082 # ; should have either the end of line or a space or \ after it
5083 } elsif ($op eq ';') {
5084 if ($ctx !~ /.x[WEBC]/ &&
5085 $cc !~ /^\\/ && $cc !~ /^;/) {
5086 if (ERROR("SPACING",
5087 "space required after that '$op' $at\n" . $hereptr)) {
5088 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]) . " ";
5094 } elsif ($op eq '//') {
5096 # : when part of a bitfield
5097 } elsif ($opv eq ':B') {
5098 # skip the bitfield test for now
5102 } elsif ($op eq '->') {
5103 if ($ctx =~ /Wx.|.xW/) {
5104 if (ERROR("SPACING",
5105 "spaces prohibited around that '$op' $at\n" . $hereptr)) {
5106 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
5107 if (defined $fix_elements[$n + 2]) {
5108 $fix_elements[$n + 2] =~ s/^\s+//;
5114 # , must not have a space before and must have a space on the right.
5115 } elsif ($op eq ',') {
5116 my $rtrim_before = 0;
5117 my $space_after = 0;
5118 if ($ctx =~ /Wx./) {
5119 if (ERROR("SPACING",
5120 "space prohibited before that '$op' $at\n" . $hereptr)) {
5125 if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) {
5126 if (ERROR("SPACING",
5127 "space required after that '$op' $at\n" . $hereptr)) {
5133 if ($rtrim_before || $space_after) {
5134 if ($rtrim_before) {
5135 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
5137 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]);
5144 # '*' as part of a type definition -- reported already.
5145 } elsif ($opv eq '*_') {
5146 #warn "'*' is part of type\n";
5148 # unary operators should have a space before and
5149 # none after. May be left adjacent to another
5150 # unary operator, or a cast
5151 } elsif ($op eq '!' || $op eq '~' ||
5152 $opv eq '*U' || $opv eq '-U' ||
5153 $opv eq '&U' || $opv eq '&&U') {
5154 if ($ctx !~ /[WEBC]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
5155 if (ERROR("SPACING",
5156 "space required before that '$op' $at\n" . $hereptr)) {
5157 if ($n != $last_after + 2) {
5158 $good = $fix_elements[$n] . " " . ltrim($fix_elements[$n + 1]);
5163 if ($op eq '*' && $cc =~/\s*$Modifier\b/) {
5164 # A unary '*' may be const
5166 } elsif ($ctx =~ /.xW/) {
5167 if (ERROR("SPACING",
5168 "space prohibited after that '$op' $at\n" . $hereptr)) {
5169 $good = $fix_elements[$n] . rtrim($fix_elements[$n + 1]);
5170 if (defined $fix_elements[$n + 2]) {
5171 $fix_elements[$n + 2] =~ s/^\s+//;
5177 # unary ++ and unary -- are allowed no space on one side.
5178 } elsif ($op eq '++' or $op eq '--') {
5179 if ($ctx !~ /[WEOBC]x[^W]/ && $ctx !~ /[^W]x[WOBEC]/) {
5180 if (ERROR("SPACING",
5181 "space required one side of that '$op' $at\n" . $hereptr)) {
5182 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]) . " ";
5186 if ($ctx =~ /Wx[BE]/ ||
5187 ($ctx =~ /Wx./ && $cc =~ /^;/)) {
5188 if (ERROR("SPACING",
5189 "space prohibited before that '$op' $at\n" . $hereptr)) {
5190 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
5194 if ($ctx =~ /ExW/) {
5195 if (ERROR("SPACING",
5196 "space prohibited after that '$op' $at\n" . $hereptr)) {
5197 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]);
5198 if (defined $fix_elements[$n + 2]) {
5199 $fix_elements[$n + 2] =~ s/^\s+//;
5205 # << and >> may either have or not have spaces both sides
5206 } elsif ($op eq '<<' or $op eq '>>' or
5207 $op eq '&' or $op eq '^' or $op eq '|' or
5208 $op eq '+' or $op eq '-' or
5209 $op eq '*' or $op eq '/' or
5213 if (defined $fix_elements[$n + 2] && $ctx !~ /[EW]x[EW]/) {
5215 "spaces preferred around that '$op' $at\n" . $hereptr)) {
5216 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
5217 $fix_elements[$n + 2] =~ s/^\s+//;
5220 } elsif (!defined $fix_elements[$n + 2] && $ctx !~ /Wx[OE]/) {
5222 "space preferred before that '$op' $at\n" . $hereptr)) {
5223 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]);
5227 } elsif ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
5228 if (ERROR("SPACING",
5229 "need consistent spacing around '$op' $at\n" . $hereptr)) {
5230 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
5231 if (defined $fix_elements[$n + 2]) {
5232 $fix_elements[$n + 2] =~ s/^\s+//;
5238 # A colon needs no spaces before when it is
5239 # terminating a case value or a label.
5240 } elsif ($opv eq ':C' || $opv eq ':L') {
5241 if ($ctx =~ /Wx./ and $realfile !~ m@.*\.lds\.h$@) {
5242 if (ERROR("SPACING",
5243 "space prohibited before that '$op' $at\n" . $hereptr)) {
5244 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
5249 # All the others need spaces both sides.
5250 } elsif ($ctx !~ /[EWC]x[CWE]/) {
5253 # Ignore email addresses <foo@bar>
5255 $cc =~ /^\S+\@\S+>/) ||
5257 $ca =~ /<\S+\@\S+$/))
5262 # for asm volatile statements
5263 # ignore a colon with another
5264 # colon immediately before or after
5266 ($ca =~ /:$/ || $cc =~ /^:/)) {
5270 # messages are ERROR, but ?: are CHK
5272 my $msg_level = \&ERROR;
5273 $msg_level = \&CHK if (($op eq '?:' || $op eq '?' || $op eq ':') && $ctx =~ /VxV/);
5275 if (&{$msg_level}("SPACING",
5276 "spaces required around that '$op' $at\n" . $hereptr)) {
5277 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
5278 if (defined $fix_elements[$n + 2]) {
5279 $fix_elements[$n + 2] =~ s/^\s+//;
5285 $off += length($elements[$n + 1]);
5287 ## print("n: <$n> GOOD: <$good>\n");
5289 $fixed_line = $fixed_line . $good;
5292 if (($#elements % 2) == 0) {
5293 $fixed_line = $fixed_line . $fix_elements[$#elements];
5296 if ($fix && $line_fixed && $fixed_line ne $fixed[$fixlinenr]) {
5297 $fixed[$fixlinenr] = $fixed_line;
5303 # check for whitespace before a non-naked semicolon
5304 if ($line =~ /^\+.*\S\s+;\s*$/) {
5306 "space prohibited before semicolon\n" . $herecurr) &&
5308 1 while $fixed[$fixlinenr] =~
5309 s/^(\+.*\S)\s+;/$1;/;
5313 # check for multiple assignments
5314 if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
5315 CHK("MULTIPLE_ASSIGNMENTS",
5316 "multiple assignments should be avoided\n" . $herecurr);
5319 ## # check for multiple declarations, allowing for a function declaration
5321 ## if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ &&
5322 ## $line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) {
5324 ## # Remove any bracketed sections to ensure we do not
5325 ## # falsely report the parameters of functions.
5327 ## while ($ln =~ s/\([^\(\)]*\)//g) {
5329 ## if ($ln =~ /,/) {
5330 ## WARN("MULTIPLE_DECLARATION",
5331 ## "declaring multiple variables together should be avoided\n" . $herecurr);
5335 #need space before brace following if, while, etc
5336 if (($line =~ /\(.*\)\{/ && $line !~ /\($Type\)\{/) ||
5337 $line =~ /\b(?:else|do)\{/) {
5338 if (ERROR("SPACING",
5339 "space required before the open brace '{'\n" . $herecurr) &&
5341 $fixed[$fixlinenr] =~ s/^(\+.*(?:do|else|\)))\{/$1 {/;
5345 ## # check for blank lines before declarations
5346 ## if ($line =~ /^.\t+$Type\s+$Ident(?:\s*=.*)?;/ &&
5347 ## $prevrawline =~ /^.\s*$/) {
5349 ## "No blank lines before declarations\n" . $hereprev);
5353 # closing brace should have a space following it when it has anything
5355 if ($line =~ /}(?!(?:,|;|\)|\}))\S/) {
5356 if (ERROR("SPACING",
5357 "space required after that close brace '}'\n" . $herecurr) &&
5359 $fixed[$fixlinenr] =~
5360 s/}((?!(?:,|;|\)))\S)/} $1/;
5364 # check spacing on square brackets
5365 if ($line =~ /\[\s/ && $line !~ /\[\s*$/) {
5366 if (ERROR("SPACING",
5367 "space prohibited after that open square bracket '['\n" . $herecurr) &&
5369 $fixed[$fixlinenr] =~
5373 if ($line =~ /\s\]/) {
5374 if (ERROR("SPACING",
5375 "space prohibited before that close square bracket ']'\n" . $herecurr) &&
5377 $fixed[$fixlinenr] =~
5382 # check spacing on parentheses
5383 if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
5384 $line !~ /for\s*\(\s+;/) {
5385 if (ERROR("SPACING",
5386 "space prohibited after that open parenthesis '('\n" . $herecurr) &&
5388 $fixed[$fixlinenr] =~
5392 if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ &&
5393 $line !~ /for\s*\(.*;\s+\)/ &&
5394 $line !~ /:\s+\)/) {
5395 if (ERROR("SPACING",
5396 "space prohibited before that close parenthesis ')'\n" . $herecurr) &&
5398 $fixed[$fixlinenr] =~
5403 # check unnecessary parentheses around addressof/dereference single $Lvals
5404 # ie: &(foo->bar) should be &foo->bar and *(foo->bar) should be *foo->bar
5406 while ($line =~ /(?:[^&]&\s*|\*)\(\s*($Ident\s*(?:$Member\s*)+)\s*\)/g) {
5408 if (CHK("UNNECESSARY_PARENTHESES",
5409 "Unnecessary parentheses around $var\n" . $herecurr) &&
5411 $fixed[$fixlinenr] =~ s/\(\s*\Q$var\E\s*\)/$var/;
5415 # check for unnecessary parentheses around function pointer uses
5416 # ie: (foo->bar)(); should be foo->bar();
5417 # but not "if (foo->bar) (" to avoid some false positives
5418 if ($line =~ /(\bif\s*|)(\(\s*$Ident\s*(?:$Member\s*)+\))[ \t]*\(/ && $1 !~ /^if/) {
5420 if (CHK("UNNECESSARY_PARENTHESES",
5421 "Unnecessary parentheses around function pointer $var\n" . $herecurr) &&
5423 my $var2 = deparenthesize($var);
5425 $fixed[$fixlinenr] =~ s/\Q$var\E/$var2/;
5429 # check for unnecessary parentheses around comparisons in if uses
5430 # when !drivers/staging or command-line uses --strict
5431 if (($realfile !~ m@^(?:drivers/staging/)@ || $check_orig) &&
5432 $perl_version_ok && defined($stat) &&
5433 $stat =~ /(^.\s*if\s*($balanced_parens))/) {
5435 my $test = substr($2, 1, -1);
5437 while ($test =~ /(?:^|[^\w\&\!\~])+\s*\(\s*([\&\!\~]?\s*$Lval\s*(?:$Compare\s*$FuncArg)?)\s*\)/g) {
5439 # avoid parentheses around potential macro args
5440 next if ($match =~ /^\s*\w+\s*$/);
5441 if (!defined($herectx)) {
5442 $herectx = $here . "\n";
5443 my $cnt = statement_rawlines($if_stat);
5444 for (my $n = 0; $n < $cnt; $n++) {
5445 my $rl = raw_line($linenr, $n);
5446 $herectx .= $rl . "\n";
5447 last if $rl =~ /^[ \+].*\{/;
5450 CHK("UNNECESSARY_PARENTHESES",
5451 "Unnecessary parentheses around '$match'\n" . $herectx);
5455 # check that goto labels aren't indented (allow a single space indentation)
5456 # and ignore bitfield definitions like foo:1
5457 # Strictly, labels can have whitespace after the identifier and before the :
5458 # but this is not allowed here as many ?: uses would appear to be labels
5459 if ($sline =~ /^.\s+[A-Za-z_][A-Za-z\d_]*:(?!\s*\d+)/ &&
5460 $sline !~ /^. [A-Za-z\d_][A-Za-z\d_]*:/ &&
5461 $sline !~ /^.\s+default:/) {
5462 if (WARN("INDENTED_LABEL",
5463 "labels should not be indented\n" . $herecurr) &&
5465 $fixed[$fixlinenr] =~
5470 # check if a statement with a comma should be two statements like:
5471 # foo = bar(), /* comma should be semicolon */
5473 if (defined($stat) &&
5474 $stat =~ /^\+\s*(?:$Lval\s*$Assignment\s*)?$FuncArg\s*,\s*(?:$Lval\s*$Assignment\s*)?$FuncArg\s*;\s*$/) {
5475 my $cnt = statement_rawlines($stat);
5476 my $herectx = get_stat_here($linenr, $cnt, $here);
5477 WARN("SUSPECT_COMMA_SEMICOLON",
5478 "Possible comma where semicolon could be used\n" . $herectx);
5481 # return is not a function
5482 if (defined($stat) && $stat =~ /^.\s*return(\s*)\(/s) {
5484 if ($perl_version_ok &&
5485 $stat =~ /^.\s*return\s*($balanced_parens)\s*;\s*$/) {
5487 $value = deparenthesize($value);
5488 if ($value =~ m/^\s*$FuncArg\s*(?:\?|$)/) {
5489 ERROR("RETURN_PARENTHESES",
5490 "return is not a function, parentheses are not required\n" . $herecurr);
5492 } elsif ($spacing !~ /\s+/) {
5494 "space required before the open parenthesis '('\n" . $herecurr);
5498 # unnecessary return in a void function
5499 # at end-of-function, with the previous line a single leading tab, then return;
5500 # and the line before that not a goto label target like "out:"
5501 if ($sline =~ /^[ \+]}\s*$/ &&
5502 $prevline =~ /^\+\treturn\s*;\s*$/ &&
5504 $lines[$linenr - 3] =~ /^[ +]/ &&
5505 $lines[$linenr - 3] !~ /^[ +]\s*$Ident\s*:/) {
5507 "void function return statements are not generally useful\n" . $hereprev);
5510 # if statements using unnecessary parentheses - ie: if ((foo == bar))
5511 if ($perl_version_ok &&
5512 $line =~ /\bif\s*((?:\(\s*){2,})/) {
5513 my $openparens = $1;
5514 my $count = $openparens =~ tr@\(@\(@;
5516 if ($line =~ /\bif\s*(?:\(\s*){$count,$count}$LvalOrFunc\s*($Compare)\s*$LvalOrFunc(?:\s*\)){$count,$count}/) {
5517 my $comp = $4; #Not $1 because of $LvalOrFunc
5518 $msg = " - maybe == should be = ?" if ($comp eq "==");
5519 WARN("UNNECESSARY_PARENTHESES",
5520 "Unnecessary parentheses$msg\n" . $herecurr);
5524 # comparisons with a constant or upper case identifier on the left
5525 # avoid cases like "foo + BAR < baz"
5526 # only fix matches surrounded by parentheses to avoid incorrect
5527 # conversions like "FOO < baz() + 5" being "misfixed" to "baz() > FOO + 5"
5528 if ($perl_version_ok &&
5529 $line =~ /^\+(.*)\b($Constant|[A-Z_][A-Z0-9_]*)\s*($Compare)\s*($LvalOrFunc)/) {
5534 my $newcomp = $comp;
5535 if ($lead !~ /(?:$Operators|\.)\s*$/ &&
5536 $to !~ /^(?:Constant|[A-Z_][A-Z0-9_]*)$/ &&
5537 WARN("CONSTANT_COMPARISON",
5538 "Comparisons should place the constant on the right side of the test\n" . $herecurr) &&
5542 } elsif ($comp eq "<=") {
5544 } elsif ($comp eq ">") {
5546 } elsif ($comp eq ">=") {
5549 $fixed[$fixlinenr] =~ s/\(\s*\Q$const\E\s*$Compare\s*\Q$to\E\s*\)/($to $newcomp $const)/;
5553 # Return of what appears to be an errno should normally be negative
5554 if ($sline =~ /\breturn(?:\s*\(+\s*|\s+)(E[A-Z]+)(?:\s*\)+\s*|\s*)[;:,]/) {
5556 if ($name ne 'EOF' && $name ne 'ERROR' && $name !~ /^EPOLL/) {
5557 WARN("USE_NEGATIVE_ERRNO",
5558 "return of an errno should typically be negative (ie: return -$1)\n" . $herecurr);
5562 # Need a space before open parenthesis after if, while etc
5563 if ($line =~ /\b(if|while|for|switch)\(/) {
5564 if (ERROR("SPACING",
5565 "space required before the open parenthesis '('\n" . $herecurr) &&
5567 $fixed[$fixlinenr] =~
5568 s/\b(if|while|for|switch)\(/$1 \(/;
5572 # Check for illegal assignment in if conditional -- and check for trailing
5573 # statements after the conditional.
5574 if ($line =~ /do\s*(?!{)/) {
5575 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
5576 ctx_statement_block($linenr, $realcnt, 0)
5577 if (!defined $stat);
5578 my ($stat_next) = ctx_statement_block($line_nr_next,
5579 $remain_next, $off_next);
5580 $stat_next =~ s/\n./\n /g;
5581 ##print "stat<$stat> stat_next<$stat_next>\n";
5583 if ($stat_next =~ /^\s*while\b/) {
5584 # If the statement carries leading newlines,
5585 # then count those as offsets.
5587 ($stat_next =~ /^((?:\s*\n[+-])*\s*)/s);
5589 statement_rawlines($whitespace) - 1;
5591 $suppress_whiletrailers{$line_nr_next +
5595 if (!defined $suppress_whiletrailers{$linenr} &&
5596 defined($stat) && defined($cond) &&
5597 $line =~ /\b(?:if|while|for)\s*\(/ && $line !~ /^.\s*#/) {
5598 my ($s, $c) = ($stat, $cond);
5599 my $fixed_assign_in_if = 0;
5601 if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/s) {
5602 if (ERROR("ASSIGN_IN_IF",
5603 "do not use assignment in if condition\n" . $herecurr) &&
5604 $fix && $perl_version_ok) {
5605 if ($rawline =~ /^\+(\s+)if\s*\(\s*(\!)?\s*\(\s*(($Lval)\s*=\s*$LvalOrFunc)\s*\)\s*(?:($Compare)\s*($FuncArg))?\s*\)\s*(\{)?\s*$/) {
5613 fix_delete_line($fixlinenr, $rawline);
5614 fix_insert_line($fixlinenr, "$space$statement;");
5615 my $newline = "${space}if (";
5616 $newline .= '!' if defined($not);
5617 $newline .= '(' if (defined $not && defined($test) && defined($against));
5618 $newline .= "$assigned";
5619 $newline .= " $test $against" if (defined($test) && defined($against));
5620 $newline .= ')' if (defined $not && defined($test) && defined($against));
5622 $newline .= " {" if (defined($brace));
5623 fix_insert_line($fixlinenr + 1, $newline);
5624 $fixed_assign_in_if = 1;
5629 # Find out what is on the end of the line after the
5631 substr($s, 0, length($c), '');
5633 $s =~ s/$;//g; # Remove any comments
5634 if (length($c) && $s !~ /^\s*{?\s*\\*\s*$/ &&
5635 $c !~ /}\s*while\s*/)
5637 # Find out how long the conditional actually is.
5638 my @newlines = ($c =~ /\n/gs);
5639 my $cond_lines = 1 + $#newlines;
5642 $stat_real = raw_line($linenr, $cond_lines)
5643 . "\n" if ($cond_lines);
5644 if (defined($stat_real) && $cond_lines > 1) {
5645 $stat_real = "[...]\n$stat_real";
5648 if (ERROR("TRAILING_STATEMENTS",
5649 "trailing statements should be on next line\n" . $herecurr . $stat_real) &&
5650 !$fixed_assign_in_if &&
5652 $fix && $perl_version_ok &&
5653 $fixed[$fixlinenr] =~ /^\+(\s*)((?:if|while|for)\s*$balanced_parens)\s*(.*)$/) {
5656 my $rest = rtrim($4);
5657 if ($rest =~ /;$/) {
5658 $fixed[$fixlinenr] = "\+$indent$test";
5659 fix_insert_line($fixlinenr + 1, "$indent\t$rest");
5665 # Check for bitwise tests written as boolean
5677 WARN("HEXADECIMAL_BOOLEAN_TEST",
5678 "boolean test with hexadecimal, perhaps just 1 \& or \|?\n" . $herecurr);
5681 # if and else should not have general statements after it
5682 if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/) {
5684 $s =~ s/$;//g; # Remove any comments
5685 if ($s !~ /^\s*(?:\sif|(?:{|)\s*\\?\s*$)/) {
5686 ERROR("TRAILING_STATEMENTS",
5687 "trailing statements should be on next line\n" . $herecurr);
5690 # if should not continue a brace
5691 if ($line =~ /}\s*if\b/) {
5692 ERROR("TRAILING_STATEMENTS",
5693 "trailing statements should be on next line (or did you mean 'else if'?)\n" .
5696 # case and default should not have general statements after them
5697 if ($line =~ /^.\s*(?:case\s*.*|default\s*):/g &&
5699 (?:\s*$;*)(?:\s*{)?(?:\s*$;*)(?:\s*\\)?\s*$|
5703 ERROR("TRAILING_STATEMENTS",
5704 "trailing statements should be on next line\n" . $herecurr);
5707 # Check for }<nl>else {, these must be at the same
5708 # indent level to be relevant to each other.
5709 if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ &&
5710 $previndent == $indent) {
5711 if (ERROR("ELSE_AFTER_BRACE",
5712 "else should follow close brace '}'\n" . $hereprev) &&
5713 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
5714 fix_delete_line($fixlinenr - 1, $prevrawline);
5715 fix_delete_line($fixlinenr, $rawline);
5716 my $fixedline = $prevrawline;
5717 $fixedline =~ s/}\s*$//;
5718 if ($fixedline !~ /^\+\s*$/) {
5719 fix_insert_line($fixlinenr, $fixedline);
5721 $fixedline = $rawline;
5722 $fixedline =~ s/^(.\s*)else/$1} else/;
5723 fix_insert_line($fixlinenr, $fixedline);
5727 if ($prevline=~/}\s*$/ and $line=~/^.\s*while\s*/ &&
5728 $previndent == $indent) {
5729 my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
5731 # Find out what is on the end of the line after the
5733 substr($s, 0, length($c), '');
5736 if ($s =~ /^\s*;/) {
5737 if (ERROR("WHILE_AFTER_BRACE",
5738 "while should follow close brace '}'\n" . $hereprev) &&
5739 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
5740 fix_delete_line($fixlinenr - 1, $prevrawline);
5741 fix_delete_line($fixlinenr, $rawline);
5742 my $fixedline = $prevrawline;
5743 my $trailing = $rawline;
5744 $trailing =~ s/^\+//;
5745 $trailing = trim($trailing);
5746 $fixedline =~ s/}\s*$/} $trailing/;
5747 fix_insert_line($fixlinenr, $fixedline);
5752 #Specific variable tests
5753 while ($line =~ m{($Constant|$Lval)}g) {
5757 if ($var !~ /^$Constant$/ &&
5758 $var =~ /[A-Z][a-z]|[a-z][A-Z]/ &&
5759 #Ignore some autogenerated defines and enum values
5760 $var !~ /^(?:[A-Z]+_){1,5}[A-Z]{1,3}[a-z]/ &&
5761 #Ignore Page<foo> variants
5762 $var !~ /^(?:Clear|Set|TestClear|TestSet|)Page[A-Z]/ &&
5763 #Ignore SI style variants like nS, mV and dB
5764 #(ie: max_uV, regulator_min_uA_show, RANGE_mA_VALUE)
5765 $var !~ /^(?:[a-z0-9_]*|[A-Z0-9_]*)?_?[a-z][A-Z](?:_[a-z0-9_]+|_[A-Z0-9_]+)?$/ &&
5766 #Ignore some three character SI units explicitly, like MiB and KHz
5767 $var !~ /^(?:[a-z_]*?)_?(?:[KMGT]iB|[KMGT]?Hz)(?:_[a-z_]+)?$/) {
5768 while ($var =~ m{\b($Ident)}g) {
5770 next if ($word !~ /[A-Z][a-z]|[a-z][A-Z]/);
5772 seed_camelcase_includes();
5773 if (!$file && !$camelcase_file_seeded) {
5774 seed_camelcase_file($realfile);
5775 $camelcase_file_seeded = 1;
5778 if (!defined $camelcase{$word}) {
5779 $camelcase{$word} = 1;
5781 "Avoid CamelCase: <$word>\n" . $herecurr);
5787 #no spaces allowed after \ in define
5788 if ($line =~ /\#\s*define.*\\\s+$/) {
5789 if (WARN("WHITESPACE_AFTER_LINE_CONTINUATION",
5790 "Whitespace after \\ makes next lines useless\n" . $herecurr) &&
5792 $fixed[$fixlinenr] =~ s/\s+$//;
5796 # warn if <asm/foo.h> is #included and <linux/foo.h> is available and includes
5797 # itself <asm/foo.h> (uses RAW line)
5798 if ($tree && $rawline =~ m{^.\s*\#\s*include\s*\<asm\/(.*)\.h\>}) {
5800 my $checkfile = "include/linux/$file";
5801 if (-f "$root/$checkfile" &&
5802 $realfile ne $checkfile &&
5803 $1 !~ /$allowed_asm_includes/)
5805 my $asminclude = `grep -Ec "#include\\s+<asm/$file>" $root/$checkfile`;
5806 if ($asminclude > 0) {
5807 if ($realfile =~ m{^arch/}) {
5808 CHK("ARCH_INCLUDE_LINUX",
5809 "Consider using #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
5811 WARN("INCLUDE_LINUX",
5812 "Use #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
5818 # multi-statement macros should be enclosed in a do while loop, grab the
5819 # first statement and ensure its the whole macro if its not enclosed
5820 # in a known good container
5821 if ($realfile !~ m@/vmlinux.lds.h$@ &&
5822 $line =~ /^.\s*\#\s*define\s*$Ident(\()?/) {
5825 my ($off, $dstat, $dcond, $rest);
5827 my $has_flow_statement = 0;
5828 my $has_arg_concat = 0;
5829 ($dstat, $dcond, $ln, $cnt, $off) =
5830 ctx_statement_block($linenr, $realcnt, 0);
5832 #print "dstat<$dstat> dcond<$dcond> cnt<$cnt> off<$off>\n";
5833 #print "LINE<$lines[$ln-1]> len<" . length($lines[$ln-1]) . "\n";
5835 $has_flow_statement = 1 if ($ctx =~ /\b(goto|return)\b/);
5836 $has_arg_concat = 1 if ($ctx =~ /\#\#/ && $ctx !~ /\#\#\s*(?:__VA_ARGS__|args)\b/);
5838 $dstat =~ s/^.\s*\#\s*define\s+$Ident(\([^\)]*\))?\s*//;
5839 my $define_args = $1;
5840 my $define_stmt = $dstat;
5843 if (defined $define_args && $define_args ne "") {
5844 $define_args = substr($define_args, 1, length($define_args) - 2);
5845 $define_args =~ s/\s*//g;
5846 $define_args =~ s/\\\+?//g;
5847 @def_args = split(",", $define_args);
5851 $dstat =~ s/\\\n.//g;
5852 $dstat =~ s/^\s*//s;
5853 $dstat =~ s/\s*$//s;
5855 # Flatten any parentheses and braces
5856 while ($dstat =~ s/\([^\(\)]*\)/1u/ ||
5857 $dstat =~ s/\{[^\{\}]*\}/1u/ ||
5858 $dstat =~ s/.\[[^\[\]]*\]/1u/)
5862 # Flatten any obvious string concatenation.
5863 while ($dstat =~ s/($String)\s*$Ident/$1/ ||
5864 $dstat =~ s/$Ident\s*($String)/$1/)
5868 # Make asm volatile uses seem like a generic function
5869 $dstat =~ s/\b_*asm_*\s+_*volatile_*\b/asm_volatile/g;
5871 my $exceptions = qr{
5884 #print "REST<$rest> dstat<$dstat> ctx<$ctx>\n";
5887 my $stmt_cnt = statement_rawlines($ctx);
5888 my $herectx = get_stat_here($linenr, $stmt_cnt, $here);
5891 $dstat !~ /^(?:$Ident|-?$Constant),$/ && # 10, // foo(),
5892 $dstat !~ /^(?:$Ident|-?$Constant);$/ && # foo();
5893 $dstat !~ /^[!~-]?(?:$Lval|$Constant)$/ && # 10 // foo() // !foo // ~foo // -foo // foo->bar // foo.bar->baz
5894 $dstat !~ /^'X'$/ && $dstat !~ /^'XX'$/ && # character constants
5895 $dstat !~ /$exceptions/ &&
5896 $dstat !~ /^\.$Ident\s*=/ && # .foo =
5897 $dstat !~ /^(?:\#\s*$Ident|\#\s*$Constant)\s*$/ && # stringification #foo
5898 $dstat !~ /^do\s*$Constant\s*while\s*$Constant;?$/ && # do {...} while (...); // do {...} while (...)
5899 $dstat !~ /^while\s*$Constant\s*$Constant\s*$/ && # while (...) {...}
5900 $dstat !~ /^for\s*$Constant$/ && # for (...)
5901 $dstat !~ /^for\s*$Constant\s+(?:$Ident|-?$Constant)$/ && # for (...) bar()
5902 $dstat !~ /^do\s*{/ && # do {...
5903 $dstat !~ /^\(\{/ && # ({...
5904 $ctx !~ /^.\s*#\s*define\s+TRACE_(?:SYSTEM|INCLUDE_FILE|INCLUDE_PATH)\b/)
5906 if ($dstat =~ /^\s*if\b/) {
5907 ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
5908 "Macros starting with if should be enclosed by a do - while loop to avoid possible if/else logic defects\n" . "$herectx");
5909 } elsif ($dstat =~ /;/) {
5910 ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
5911 "Macros with multiple statements should be enclosed in a do - while loop\n" . "$herectx");
5913 ERROR("COMPLEX_MACRO",
5914 "Macros with complex values should be enclosed in parentheses\n" . "$herectx");
5919 # Make $define_stmt single line, comment-free, etc
5920 my @stmt_array = split('\n', $define_stmt);
5923 foreach my $l (@stmt_array) {
5928 } elsif ($l =~ /^[\+ ]/) {
5929 $define_stmt .= substr($l, 1);
5932 $define_stmt =~ s/$;//g;
5933 $define_stmt =~ s/\s+/ /g;
5934 $define_stmt = trim($define_stmt);
5936 # check if any macro arguments are reused (ignore '...' and 'type')
5937 foreach my $arg (@def_args) {
5938 next if ($arg =~ /\.\.\./);
5939 next if ($arg =~ /^type$/i);
5940 my $tmp_stmt = $define_stmt;
5941 $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;
5942 $tmp_stmt =~ s/\#+\s*$arg\b//g;
5943 $tmp_stmt =~ s/\b$arg\s*\#\#//g;
5944 my $use_cnt = () = $tmp_stmt =~ /\b$arg\b/g;
5946 CHK("MACRO_ARG_REUSE",
5947 "Macro argument reuse '$arg' - possible side-effects?\n" . "$herectx");
5949 # check if any macro arguments may have other precedence issues
5950 if ($tmp_stmt =~ m/($Operators)?\s*\b$arg\b\s*($Operators)?/m &&
5951 ((defined($1) && $1 ne ',') ||
5952 (defined($2) && $2 ne ','))) {
5953 CHK("MACRO_ARG_PRECEDENCE",
5954 "Macro argument '$arg' may be better as '($arg)' to avoid precedence issues\n" . "$herectx");
5958 # check for macros with flow control, but without ## concatenation
5959 # ## concatenation is commonly a macro that defines a function so ignore those
5960 if ($has_flow_statement && !$has_arg_concat) {
5961 my $cnt = statement_rawlines($ctx);
5962 my $herectx = get_stat_here($linenr, $cnt, $here);
5964 WARN("MACRO_WITH_FLOW_CONTROL",
5965 "Macros with flow control statements should be avoided\n" . "$herectx");
5968 # check for line continuations outside of #defines, preprocessor #, and asm
5971 if ($prevline !~ /^..*\\$/ &&
5972 $line !~ /^\+\s*\#.*\\$/ && # preprocessor
5973 $line !~ /^\+.*\b(__asm__|asm)\b.*\\$/ && # asm
5974 $line =~ /^\+.*\\$/) {
5975 WARN("LINE_CONTINUATIONS",
5976 "Avoid unnecessary line continuations\n" . $herecurr);
5980 # do {} while (0) macro tests:
5981 # single-statement macros do not need to be enclosed in do while (0) loop,
5982 # macro should not end with a semicolon
5983 if ($perl_version_ok &&
5984 $realfile !~ m@/vmlinux.lds.h$@ &&
5985 $line =~ /^.\s*\#\s*define\s+$Ident(\()?/) {
5988 my ($off, $dstat, $dcond, $rest);
5990 ($dstat, $dcond, $ln, $cnt, $off) =
5991 ctx_statement_block($linenr, $realcnt, 0);
5994 $dstat =~ s/\\\n.//g;
5997 if ($dstat =~ /^\+\s*#\s*define\s+$Ident\s*${balanced_parens}\s*do\s*{(.*)\s*}\s*while\s*\(\s*0\s*\)\s*([;\s]*)\s*$/) {
6002 my $cnt = statement_rawlines($ctx);
6003 my $herectx = get_stat_here($linenr, $cnt, $here);
6005 if (($stmts =~ tr/;/;/) == 1 &&
6006 $stmts !~ /^\s*(if|while|for|switch)\b/) {
6007 WARN("SINGLE_STATEMENT_DO_WHILE_MACRO",
6008 "Single statement macros should not use a do {} while (0) loop\n" . "$herectx");
6010 if (defined $semis && $semis ne "") {
6011 WARN("DO_WHILE_MACRO_WITH_TRAILING_SEMICOLON",
6012 "do {} while (0) macros should not be semicolon terminated\n" . "$herectx");
6014 } elsif ($dstat =~ /^\+\s*#\s*define\s+$Ident.*;\s*$/) {
6016 my $cnt = statement_rawlines($ctx);
6017 my $herectx = get_stat_here($linenr, $cnt, $here);
6019 WARN("TRAILING_SEMICOLON",
6020 "macros should not use a trailing semicolon\n" . "$herectx");
6024 # check for redundant bracing round if etc
6025 if ($line =~ /(^.*)\bif\b/ && $1 !~ /else\s*$/) {
6026 my ($level, $endln, @chunks) =
6027 ctx_statement_full($linenr, $realcnt, 1);
6028 #print "chunks<$#chunks> linenr<$linenr> endln<$endln> level<$level>\n";
6029 #print "APW: <<$chunks[1][0]>><<$chunks[1][1]>>\n";
6030 if ($#chunks > 0 && $level == 0) {
6034 my $herectx = $here . "\n";
6035 my $ln = $linenr - 1;
6036 for my $chunk (@chunks) {
6037 my ($cond, $block) = @{$chunk};
6039 # If the condition carries leading newlines, then count those as offsets.
6040 my ($whitespace) = ($cond =~ /^((?:\s*\n[+-])*\s*)/s);
6041 my $offset = statement_rawlines($whitespace) - 1;
6043 $allowed[$allow] = 0;
6044 #print "COND<$cond> whitespace<$whitespace> offset<$offset>\n";
6046 # We have looked at and allowed this specific line.
6047 $suppress_ifbraces{$ln + $offset} = 1;
6049 $herectx .= "$rawlines[$ln + $offset]\n[...]\n";
6050 $ln += statement_rawlines($block) - 1;
6052 substr($block, 0, length($cond), '');
6054 $seen++ if ($block =~ /^\s*{/);
6056 #print "cond<$cond> block<$block> allowed<$allowed[$allow]>\n";
6057 if (statement_lines($cond) > 1) {
6058 #print "APW: ALLOWED: cond<$cond>\n";
6059 $allowed[$allow] = 1;
6061 if ($block =~/\b(?:if|for|while)\b/) {
6062 #print "APW: ALLOWED: block<$block>\n";
6063 $allowed[$allow] = 1;
6065 if (statement_block_size($block) > 1) {
6066 #print "APW: ALLOWED: lines block<$block>\n";
6067 $allowed[$allow] = 1;
6072 my $sum_allowed = 0;
6073 foreach (@allowed) {
6076 if ($sum_allowed == 0) {
6078 "braces {} are not necessary for any arm of this statement\n" . $herectx);
6079 } elsif ($sum_allowed != $allow &&
6082 "braces {} should be used on all arms of this statement\n" . $herectx);
6087 if (!defined $suppress_ifbraces{$linenr - 1} &&
6088 $line =~ /\b(if|while|for|else)\b/) {
6091 # Check the pre-context.
6092 if (substr($line, 0, $-[0]) =~ /(\}\s*)$/) {
6093 #print "APW: ALLOWED: pre<$1>\n";
6097 my ($level, $endln, @chunks) =
6098 ctx_statement_full($linenr, $realcnt, $-[0]);
6100 # Check the condition.
6101 my ($cond, $block) = @{$chunks[0]};
6102 #print "CHECKING<$linenr> cond<$cond> block<$block>\n";
6103 if (defined $cond) {
6104 substr($block, 0, length($cond), '');
6106 if (statement_lines($cond) > 1) {
6107 #print "APW: ALLOWED: cond<$cond>\n";
6110 if ($block =~/\b(?:if|for|while)\b/) {
6111 #print "APW: ALLOWED: block<$block>\n";
6114 if (statement_block_size($block) > 1) {
6115 #print "APW: ALLOWED: lines block<$block>\n";
6118 # Check the post-context.
6119 if (defined $chunks[1]) {
6120 my ($cond, $block) = @{$chunks[1]};
6121 if (defined $cond) {
6122 substr($block, 0, length($cond), '');
6124 if ($block =~ /^\s*\{/) {
6125 #print "APW: ALLOWED: chunk-1 block<$block>\n";
6129 if ($level == 0 && $block =~ /^\s*\{/ && !$allowed) {
6130 my $cnt = statement_rawlines($block);
6131 my $herectx = get_stat_here($linenr, $cnt, $here);
6134 "braces {} are not necessary for single statement blocks\n" . $herectx);
6138 # check for single line unbalanced braces
6139 if ($sline =~ /^.\s*\}\s*else\s*$/ ||
6140 $sline =~ /^.\s*else\s*\{\s*$/) {
6141 CHK("BRACES", "Unbalanced braces around else statement\n" . $herecurr);
6144 # check for unnecessary blank lines around braces
6145 if (($line =~ /^.\s*}\s*$/ && $prevrawline =~ /^.\s*$/)) {
6147 "Blank lines aren't necessary before a close brace '}'\n" . $hereprev) &&
6148 $fix && $prevrawline =~ /^\+/) {
6149 fix_delete_line($fixlinenr - 1, $prevrawline);
6152 if (($rawline =~ /^.\s*$/ && $prevline =~ /^..*{\s*$/)) {
6154 "Blank lines aren't necessary after an open brace '{'\n" . $hereprev) &&
6156 fix_delete_line($fixlinenr, $rawline);
6160 # no volatiles please
6161 my $asm_volatile = qr{\b(__asm__|asm)\s+(__volatile__|volatile)\b};
6162 if ($line =~ /\bvolatile\b/ && $line !~ /$asm_volatile/) {
6164 "Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst\n" . $herecurr);
6167 # Check for user-visible strings broken across lines, which breaks the ability
6168 # to grep for the string. Make exceptions when the previous string ends in a
6169 # newline (multiple lines in one string constant) or '\t', '\r', ';', or '{'
6170 # (common in inline assembly) or is a octal \123 or hexadecimal \xaf value
6171 if ($line =~ /^\+\s*$String/ &&
6172 $prevline =~ /"\s*$/ &&
6173 $prevrawline !~ /(?:\\(?:[ntr]|[0-7]{1,3}|x[0-9a-fA-F]{1,2})|;\s*|\{\s*)"\s*$/) {
6174 if (WARN("SPLIT_STRING",
6175 "quoted string split across lines\n" . $hereprev) &&
6177 $prevrawline =~ /^\+.*"\s*$/ &&
6178 $last_coalesced_string_linenr != $linenr - 1) {
6179 my $extracted_string = get_quoted_string($line, $rawline);
6180 my $comma_close = "";
6181 if ($rawline =~ /\Q$extracted_string\E(\s*\)\s*;\s*$|\s*,\s*)/) {
6185 fix_delete_line($fixlinenr - 1, $prevrawline);
6186 fix_delete_line($fixlinenr, $rawline);
6187 my $fixedline = $prevrawline;
6188 $fixedline =~ s/"\s*$//;
6189 $fixedline .= substr($extracted_string, 1) . trim($comma_close);
6190 fix_insert_line($fixlinenr - 1, $fixedline);
6191 $fixedline = $rawline;
6192 $fixedline =~ s/\Q$extracted_string\E\Q$comma_close\E//;
6193 if ($fixedline !~ /\+\s*$/) {
6194 fix_insert_line($fixlinenr, $fixedline);
6196 $last_coalesced_string_linenr = $linenr;
6200 # check for missing a space in a string concatenation
6201 if ($prevrawline =~ /[^\\]\w"$/ && $rawline =~ /^\+[\t ]+"\w/) {
6202 WARN('MISSING_SPACE',
6203 "break quoted strings at a space character\n" . $hereprev);
6206 # check for an embedded function name in a string when the function is known
6207 # This does not work very well for -f --file checking as it depends on patch
6208 # context providing the function name or a single line form for in-file
6209 # function declarations
6210 if ($line =~ /^\+.*$String/ &&
6211 defined($context_function) &&
6212 get_quoted_string($line, $rawline) =~ /\b$context_function\b/ &&
6213 length(get_quoted_string($line, $rawline)) != (length($context_function) + 2)) {
6214 WARN("EMBEDDED_FUNCTION_NAME",
6215 "Prefer using '\"%s...\", __func__' to using '$context_function', this function's name, in a string\n" . $herecurr);
6218 # check for unnecessary function tracing like uses
6219 # This does not use $logFunctions because there are many instances like
6220 # 'dprintk(FOO, "%s()\n", __func__);' which do not match $logFunctions
6221 if ($rawline =~ /^\+.*\([^"]*"$tracing_logging_tags{0,3}%s(?:\s*\(\s*\)\s*)?$tracing_logging_tags{0,3}(?:\\n)?"\s*,\s*__func__\s*\)\s*;/) {
6222 if (WARN("TRACING_LOGGING",
6223 "Unnecessary ftrace-like logging - prefer using ftrace\n" . $herecurr) &&
6225 fix_delete_line($fixlinenr, $rawline);
6229 # check for spaces before a quoted newline
6230 if ($rawline =~ /^.*\".*\s\\n/) {
6231 if (WARN("QUOTED_WHITESPACE_BEFORE_NEWLINE",
6232 "unnecessary whitespace before a quoted newline\n" . $herecurr) &&
6234 $fixed[$fixlinenr] =~ s/^(\+.*\".*)\s+\\n/$1\\n/;
6239 # concatenated string without spaces between elements
6240 if ($line =~ /$String[A-Z_]/ ||
6241 ($line =~ /([A-Za-z0-9_]+)$String/ && $1 !~ /^[Lu]$/)) {
6242 if (CHK("CONCATENATED_STRING",
6243 "Concatenated strings should use spaces between elements\n" . $herecurr) &&
6245 while ($line =~ /($String)/g) {
6246 my $extracted_string = substr($rawline, $-[0], $+[0] - $-[0]);
6247 $fixed[$fixlinenr] =~ s/\Q$extracted_string\E([A-Za-z0-9_])/$extracted_string $1/;
6248 $fixed[$fixlinenr] =~ s/([A-Za-z0-9_])\Q$extracted_string\E/$1 $extracted_string/;
6253 # uncoalesced string fragments
6254 if ($line =~ /$String\s*[Lu]?"/) {
6255 if (WARN("STRING_FRAGMENTS",
6256 "Consecutive strings are generally better as a single string\n" . $herecurr) &&
6258 while ($line =~ /($String)(?=\s*")/g) {
6259 my $extracted_string = substr($rawline, $-[0], $+[0] - $-[0]);
6260 $fixed[$fixlinenr] =~ s/\Q$extracted_string\E\s*"/substr($extracted_string, 0, -1)/e;
6265 # check for non-standard and hex prefixed decimal printf formats
6266 my $show_L = 1; #don't show the same defect twice
6268 while ($line =~ /(?:^|")([X\t]*)(?:"|$)/g) {
6269 my $string = substr($rawline, $-[1], $+[1] - $-[1]);
6270 $string =~ s/%%/__/g;
6272 if ($show_L && $string =~ /%[\*\d\.\$]*L([diouxX])/) {
6274 "\%L$1 is non-standard C, use %ll$1\n" . $herecurr);
6278 if ($show_Z && $string =~ /%[\*\d\.\$]*Z([diouxX])/) {
6280 "%Z$1 is non-standard C, use %z$1\n" . $herecurr);
6283 # check for 0x<decimal>
6284 if ($string =~ /0x%[\*\d\.\$\Llzth]*[diou]/) {
6285 ERROR("PRINTF_0XDECIMAL",
6286 "Prefixing 0x with decimal output is defective\n" . $herecurr);
6290 # check for line continuations in quoted strings with odd counts of "
6291 if ($rawline =~ /\\$/ && $sline =~ tr/"/"/ % 2) {
6292 WARN("LINE_CONTINUATIONS",
6293 "Avoid line continuations in quoted strings\n" . $herecurr);
6297 if ($line =~ /^.\s*\#\s*if\s+0\b/) {
6299 "Consider removing the code enclosed by this #if 0 and its #endif\n" . $herecurr);
6303 if ($line =~ /^.\s*\#\s*if\s+1\b/) {
6305 "Consider removing the #if 1 and its #endif\n" . $herecurr);
6308 # check for needless "if (<foo>) fn(<foo>)" uses
6309 if ($prevline =~ /\bif\s*\(\s*($Lval)\s*\)/) {
6310 my $tested = quotemeta($1);
6311 my $expr = '\s*\(\s*' . $tested . '\s*\)\s*;';
6312 if ($line =~ /\b(kfree|usb_free_urb|debugfs_remove(?:_recursive)?|(?:kmem_cache|mempool|dma_pool)_destroy)$expr/) {
6314 if (WARN('NEEDLESS_IF',
6315 "$func(NULL) is safe and this check is probably not required\n" . $hereprev) &&
6318 my $leading_tabs = "";
6319 my $new_leading_tabs = "";
6320 if ($lines[$linenr - 2] =~ /^\+(\t*)if\s*\(\s*$tested\s*\)\s*$/) {
6325 if ($lines[$linenr - 1] =~ /^\+(\t+)$func\s*\(\s*$tested\s*\)\s*;\s*$/) {
6326 $new_leading_tabs = $1;
6327 if (length($leading_tabs) + 1 ne length($new_leading_tabs)) {
6334 fix_delete_line($fixlinenr - 1, $prevrawline);
6335 $fixed[$fixlinenr] =~ s/^\+$new_leading_tabs/\+$leading_tabs/;
6341 # check for unnecessary "Out of Memory" messages
6342 if ($line =~ /^\+.*\b$logFunctions\s*\(/ &&
6343 $prevline =~ /^[ \+]\s*if\s*\(\s*(\!\s*|NULL\s*==\s*)?($Lval)(\s*==\s*NULL\s*)?\s*\)/ &&
6344 (defined $1 || defined $3) &&
6347 my $testline = $lines[$linenr - 3];
6349 my ($s, $c) = ctx_statement_block($linenr - 3, $realcnt, 0);
6350 # print("line: <$line>\nprevline: <$prevline>\ns: <$s>\nc: <$c>\n\n\n");
6352 if ($s =~ /(?:^|\n)[ \+]\s*(?:$Type\s*)?\Q$testval\E\s*=\s*(?:\([^\)]*\)\s*)?\s*$allocFunctions\s*\(/ &&
6353 $s !~ /\b__GFP_NOWARN\b/ ) {
6355 "Possible unnecessary 'out of memory' message\n" . $hereprev);
6359 # check for logging functions with KERN_<LEVEL>
6360 if ($line !~ /printk(?:_ratelimited|_once)?\s*\(/ &&
6361 $line =~ /\b$logFunctions\s*\(.*\b(KERN_[A-Z]+)\b/) {
6363 if (WARN("UNNECESSARY_KERN_LEVEL",
6364 "Possible unnecessary $level\n" . $herecurr) &&
6366 $fixed[$fixlinenr] =~ s/\s*$level\s*//;
6370 # check for logging continuations
6371 if ($line =~ /\bprintk\s*\(\s*KERN_CONT\b|\bpr_cont\s*\(/) {
6372 WARN("LOGGING_CONTINUATION",
6373 "Avoid logging continuation uses where feasible\n" . $herecurr);
6376 # check for unnecessary use of %h[xudi] and %hh[xudi] in logging functions
6377 if (defined $stat &&
6378 $line =~ /\b$logFunctions\s*\(/ &&
6379 index($stat, '"') >= 0) {
6380 my $lc = $stat =~ tr@\n@@;
6381 $lc = $lc + $linenr;
6382 my $stat_real = get_stat_real($linenr, $lc);
6383 pos($stat_real) = index($stat_real, '"');
6384 while ($stat_real =~ /[^\"%]*(%[\#\d\.\*\-]*(h+)[idux])/g) {
6387 my $lineoff = substr($stat_real, 0, $-[1]) =~ tr@\n@@;
6388 if (WARN("UNNECESSARY_MODIFIER",
6389 "Integer promotion: Using '$h' in '$pspec' is unnecessary\n" . "$here\n$stat_real\n") &&
6390 $fix && $fixed[$fixlinenr + $lineoff] =~ /^\+/) {
6393 $fixed[$fixlinenr + $lineoff] =~ s/\Q$pspec\E/$nspec/;
6398 # check for mask then right shift without a parentheses
6399 if ($perl_version_ok &&
6400 $line =~ /$LvalOrFunc\s*\&\s*($LvalOrFunc)\s*>>/ &&
6401 $4 !~ /^\&/) { # $LvalOrFunc may be &foo, ignore if so
6402 WARN("MASK_THEN_SHIFT",
6403 "Possible precedence defect with mask then right shift - may need parentheses\n" . $herecurr);
6406 # check for pointer comparisons to NULL
6407 if ($perl_version_ok) {
6408 while ($line =~ /\b$LvalOrFunc\s*(==|\!=)\s*NULL\b/g) {
6411 $equal = "" if ($4 eq "!=");
6412 if (CHK("COMPARISON_TO_NULL",
6413 "Comparison to NULL could be written \"${equal}${val}\"\n" . $herecurr) &&
6415 $fixed[$fixlinenr] =~ s/\b\Q$val\E\s*(?:==|\!=)\s*NULL\b/$equal$val/;
6420 # check for bad placement of section $InitAttribute (e.g.: __initdata)
6421 if ($line =~ /(\b$InitAttribute\b)/) {
6423 if ($line =~ /^\+\s*static\s+(?:const\s+)?(?:$attr\s+)?($NonptrTypeWithAttr)\s+(?:$attr\s+)?($Ident(?:\[[^]]*\])?)\s*[=;]/) {
6426 if ((($ptr =~ /\b(union|struct)\s+$attr\b/ &&
6427 ERROR("MISPLACED_INIT",
6428 "$attr should be placed after $var\n" . $herecurr)) ||
6429 ($ptr !~ /\b(union|struct)\s+$attr\b/ &&
6430 WARN("MISPLACED_INIT",
6431 "$attr should be placed after $var\n" . $herecurr))) &&
6433 $fixed[$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;
6438 # check for $InitAttributeData (ie: __initdata) with const
6439 if ($line =~ /\bconst\b/ && $line =~ /($InitAttributeData)/) {
6441 $attr =~ /($InitAttributePrefix)(.*)/;
6442 my $attr_prefix = $1;
6444 if (ERROR("INIT_ATTRIBUTE",
6445 "Use of const init definition must use ${attr_prefix}initconst\n" . $herecurr) &&
6447 $fixed[$fixlinenr] =~
6448 s/$InitAttributeData/${attr_prefix}initconst/;
6452 # check for $InitAttributeConst (ie: __initconst) without const
6453 if ($line !~ /\bconst\b/ && $line =~ /($InitAttributeConst)/) {
6455 if (ERROR("INIT_ATTRIBUTE",
6456 "Use of $attr requires a separate use of const\n" . $herecurr) &&
6458 my $lead = $fixed[$fixlinenr] =~
6459 /(^\+\s*(?:static\s+))/;
6461 $lead = "$lead " if ($lead !~ /^\+$/);
6462 $lead = "${lead}const ";
6463 $fixed[$fixlinenr] =~ s/(^\+\s*(?:static\s+))/$lead/;
6467 # check for __read_mostly with const non-pointer (should just be const)
6468 if ($line =~ /\b__read_mostly\b/ &&
6469 $line =~ /($Type)\s*$Ident/ && $1 !~ /\*\s*$/ && $1 =~ /\bconst\b/) {
6470 if (ERROR("CONST_READ_MOSTLY",
6471 "Invalid use of __read_mostly with const type\n" . $herecurr) &&
6473 $fixed[$fixlinenr] =~ s/\s+__read_mostly\b//;
6477 # don't use __constant_<foo> functions outside of include/uapi/
6478 if ($realfile !~ m@^include/uapi/@ &&
6479 $line =~ /(__constant_(?:htons|ntohs|[bl]e(?:16|32|64)_to_cpu|cpu_to_[bl]e(?:16|32|64)))\s*\(/) {
6480 my $constant_func = $1;
6481 my $func = $constant_func;
6482 $func =~ s/^__constant_//;
6483 if (WARN("CONSTANT_CONVERSION",
6484 "$constant_func should be $func\n" . $herecurr) &&
6486 $fixed[$fixlinenr] =~ s/\b$constant_func\b/$func/g;
6490 # prefer usleep_range over udelay
6491 if ($line =~ /\budelay\s*\(\s*(\d+)\s*\)/) {
6493 # ignore udelay's < 10, however
6494 if (! ($delay < 10) ) {
6496 "usleep_range is preferred over udelay; see Documentation/timers/timers-howto.rst\n" . $herecurr);
6498 if ($delay > 2000) {
6500 "long udelay - prefer mdelay; see arch/arm/include/asm/delay.h\n" . $herecurr);
6504 # warn about unexpectedly long msleep's
6505 if ($line =~ /\bmsleep\s*\((\d+)\);/) {
6508 "msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.rst\n" . $herecurr);
6512 # check for comparisons of jiffies
6513 if ($line =~ /\bjiffies\s*$Compare|$Compare\s*jiffies\b/) {
6514 WARN("JIFFIES_COMPARISON",
6515 "Comparing jiffies is almost always wrong; prefer time_after, time_before and friends\n" . $herecurr);
6518 # check for comparisons of get_jiffies_64()
6519 if ($line =~ /\bget_jiffies_64\s*\(\s*\)\s*$Compare|$Compare\s*get_jiffies_64\s*\(\s*\)/) {
6520 WARN("JIFFIES_COMPARISON",
6521 "Comparing get_jiffies_64() is almost always wrong; prefer time_after64, time_before64 and friends\n" . $herecurr);
6524 # warn about #ifdefs in C files
6525 # if ($line =~ /^.\s*\#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
6526 # print "#ifdef in C files should be avoided\n";
6527 # print "$herecurr";
6531 # warn about spacing in #ifdefs
6532 if ($line =~ /^.\s*\#\s*(ifdef|ifndef|elif)\s\s+/) {
6533 if (ERROR("SPACING",
6534 "exactly one space required after that #$1\n" . $herecurr) &&
6536 $fixed[$fixlinenr] =~
6537 s/^(.\s*\#\s*(ifdef|ifndef|elif))\s{2,}/$1 /;
6542 # check for spinlock_t definitions without a comment.
6543 if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/ ||
6544 $line =~ /^.\s*(DEFINE_MUTEX)\s*\(/) {
6546 if (!ctx_has_comment($first_line, $linenr)) {
6547 CHK("UNCOMMENTED_DEFINITION",
6548 "$1 definition without comment\n" . $herecurr);
6551 # check for memory barriers without a comment.
6558 my $barrier_stems = qr{
6566 my $all_barriers = qr{
6568 smp_(?:$barrier_stems)|
6569 virt_(?:$barrier_stems)
6572 if ($line =~ /\b(?:$all_barriers)\s*\(/) {
6573 if (!ctx_has_comment($first_line, $linenr)) {
6574 WARN("MEMORY_BARRIER",
6575 "memory barrier without comment\n" . $herecurr);
6579 my $underscore_smp_barriers = qr{__smp_(?:$barrier_stems)}x;
6581 if ($realfile !~ m@^include/asm-generic/@ &&
6582 $realfile !~ m@/barrier\.h$@ &&
6583 $line =~ m/\b(?:$underscore_smp_barriers)\s*\(/ &&
6584 $line !~ m/^.\s*\#\s*define\s+(?:$underscore_smp_barriers)\s*\(/) {
6585 WARN("MEMORY_BARRIER",
6586 "__smp memory barriers shouldn't be used outside barrier.h and asm-generic\n" . $herecurr);
6589 # check for waitqueue_active without a comment.
6590 if ($line =~ /\bwaitqueue_active\s*\(/) {
6591 if (!ctx_has_comment($first_line, $linenr)) {
6592 WARN("WAITQUEUE_ACTIVE",
6593 "waitqueue_active without comment\n" . $herecurr);
6597 # check for data_race without a comment.
6598 if ($line =~ /\bdata_race\s*\(/) {
6599 if (!ctx_has_comment($first_line, $linenr)) {
6601 "data_race without comment\n" . $herecurr);
6605 # check of hardware specific defines
6606 if ($line =~ m@^.\s*\#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@ && $realfile !~ m@include/asm-@) {
6608 "architecture specific defines should be avoided\n" . $herecurr);
6611 # check that the storage class is not after a type
6612 if ($line =~ /\b($Type)\s+($Storage)\b/) {
6613 WARN("STORAGE_CLASS",
6614 "storage class '$2' should be located before type '$1'\n" . $herecurr);
6616 # Check that the storage class is at the beginning of a declaration
6617 if ($line =~ /\b$Storage\b/ &&
6618 $line !~ /^.\s*$Storage/ &&
6619 $line =~ /^.\s*(.+?)\$Storage\s/ &&
6620 $1 !~ /[\,\)]\s*$/) {
6621 WARN("STORAGE_CLASS",
6622 "storage class should be at the beginning of the declaration\n" . $herecurr);
6625 # check the location of the inline attribute, that it is between
6626 # storage class and type.
6627 if ($line =~ /\b$Type\s+$Inline\b/ ||
6628 $line =~ /\b$Inline\s+$Storage\b/) {
6629 ERROR("INLINE_LOCATION",
6630 "inline keyword should sit between storage class and type\n" . $herecurr);
6633 # Check for __inline__ and __inline, prefer inline
6634 if ($realfile !~ m@\binclude/uapi/@ &&
6635 $line =~ /\b(__inline__|__inline)\b/) {
6637 "plain inline is preferred over $1\n" . $herecurr) &&
6639 $fixed[$fixlinenr] =~ s/\b(__inline__|__inline)\b/inline/;
6644 # Check for compiler attributes
6645 if ($realfile !~ m@\binclude/uapi/@ &&
6646 $rawline =~ /\b__attribute__\s*\(\s*($balanced_parens)\s*\)/) {
6648 $attr =~ s/\s*\(\s*(.*)\)\s*/$1/;
6651 "alias" => "__alias",
6652 "aligned" => "__aligned",
6653 "always_inline" => "__always_inline",
6654 "assume_aligned" => "__assume_aligned",
6656 "const" => "__attribute_const__",
6658 "designated_init" => "__designated_init",
6659 "externally_visible" => "__visible",
6660 "format" => "printf|scanf",
6661 "gnu_inline" => "__gnu_inline",
6662 "malloc" => "__malloc",
6664 "no_caller_saved_registers" => "__no_caller_saved_registers",
6665 "noclone" => "__noclone",
6666 "noinline" => "noinline",
6667 "nonstring" => "__nonstring",
6668 "noreturn" => "__noreturn",
6669 "packed" => "__packed",
6671 "section" => "__section",
6676 while ($attr =~ /\s*(\w+)\s*(${balanced_parens})?/g) {
6679 $params = $2 if defined($2);
6680 my $curr_attr = $orig_attr;
6681 $curr_attr =~ s/^[\s_]+|[\s_]+$//g;
6682 if (exists($attr_list{$curr_attr})) {
6683 my $new = $attr_list{$curr_attr};
6684 if ($curr_attr eq "format" && $params) {
6685 $params =~ /^\s*\(\s*(\w+)\s*,\s*(.*)/;
6688 $new = "$new$params";
6690 if (WARN("PREFER_DEFINED_ATTRIBUTE_MACRO",
6691 "Prefer $new over __attribute__(($orig_attr$params))\n" . $herecurr) &&
6693 my $remove = "\Q$orig_attr\E" . '\s*' . "\Q$params\E" . '(?:\s*,\s*)?';
6694 $fixed[$fixlinenr] =~ s/$remove//;
6695 $fixed[$fixlinenr] =~ s/\b__attribute__/$new __attribute__/;
6696 $fixed[$fixlinenr] =~ s/\}\Q$new\E/} $new/;
6697 $fixed[$fixlinenr] =~ s/ __attribute__\s*\(\s*\(\s*\)\s*\)//;
6702 # Check for __attribute__ unused, prefer __always_unused or __maybe_unused
6703 if ($attr =~ /^_*unused/) {
6704 WARN("PREFER_DEFINED_ATTRIBUTE_MACRO",
6705 "__always_unused or __maybe_unused is preferred over __attribute__((__unused__))\n" . $herecurr);
6709 # Check for __attribute__ weak, or __weak declarations (may have link issues)
6710 if ($perl_version_ok &&
6711 $line =~ /(?:$Declare|$DeclareMisordered)\s*$Ident\s*$balanced_parens\s*(?:$Attribute)?\s*;/ &&
6712 ($line =~ /\b__attribute__\s*\(\s*\(.*\bweak\b/ ||
6713 $line =~ /\b__weak\b/)) {
6714 ERROR("WEAK_DECLARATION",
6715 "Using weak declarations can have unintended link defects\n" . $herecurr);
6718 # check for c99 types like uint8_t used outside of uapi/ and tools/
6719 if ($realfile !~ m@\binclude/uapi/@ &&
6720 $realfile !~ m@\btools/@ &&
6721 $line =~ /\b($Declare)\s*$Ident\s*[=;,\[]/) {
6723 if ($type =~ /\b($typeC99Typedefs)\b/) {
6725 my $kernel_type = 'u';
6726 $kernel_type = 's' if ($type =~ /^_*[si]/);
6729 if (CHK("PREFER_KERNEL_TYPES",
6730 "Prefer kernel type '$kernel_type' over '$type'\n" . $herecurr) &&
6732 $fixed[$fixlinenr] =~ s/\b$type\b/$kernel_type/;
6737 # check for cast of C90 native int or longer types constants
6738 if ($line =~ /(\(\s*$C90_int_types\s*\)\s*)($Constant)\b/) {
6742 my $newconst = $const;
6743 $newconst =~ s/${Int_type}$//;
6744 $suffix .= 'U' if ($cast =~ /\bunsigned\b/);
6745 if ($cast =~ /\blong\s+long\b/) {
6747 } elsif ($cast =~ /\blong\b/) {
6750 if (WARN("TYPECAST_INT_CONSTANT",
6751 "Unnecessary typecast of c90 int constant - '$cast$const' could be '$const$suffix'\n" . $herecurr) &&
6753 $fixed[$fixlinenr] =~ s/\Q$cast\E$const\b/$newconst$suffix/;
6757 # check for sizeof(&)
6758 if ($line =~ /\bsizeof\s*\(\s*\&/) {
6759 WARN("SIZEOF_ADDRESS",
6760 "sizeof(& should be avoided\n" . $herecurr);
6763 # check for sizeof without parenthesis
6764 if ($line =~ /\bsizeof\s+((?:\*\s*|)$Lval|$Type(?:\s+$Lval|))/) {
6765 if (WARN("SIZEOF_PARENTHESIS",
6766 "sizeof $1 should be sizeof($1)\n" . $herecurr) &&
6768 $fixed[$fixlinenr] =~ s/\bsizeof\s+((?:\*\s*|)$Lval|$Type(?:\s+$Lval|))/"sizeof(" . trim($1) . ")"/ex;
6772 # check for struct spinlock declarations
6773 if ($line =~ /^.\s*\bstruct\s+spinlock\s+\w+\s*;/) {
6774 WARN("USE_SPINLOCK_T",
6775 "struct spinlock should be spinlock_t\n" . $herecurr);
6778 # check for seq_printf uses that could be seq_puts
6779 if ($sline =~ /\bseq_printf\s*\(.*"\s*\)\s*;\s*$/) {
6780 my $fmt = get_quoted_string($line, $rawline);
6783 if (WARN("PREFER_SEQ_PUTS",
6784 "Prefer seq_puts to seq_printf\n" . $herecurr) &&
6786 $fixed[$fixlinenr] =~ s/\bseq_printf\b/seq_puts/;
6791 # check for vsprintf extension %p<foo> misuses
6792 if ($perl_version_ok &&
6794 $stat =~ /^\+(?![^\{]*\{\s*).*\b(\w+)\s*\(.*$String\s*,/s &&
6795 $1 !~ /^_*volatile_*$/) {
6798 my $lc = $stat =~ tr@\n@@;
6799 $lc = $lc + $linenr;
6800 for (my $count = $linenr; $count <= $lc; $count++) {
6804 my $bad_specifier = "";
6805 my $fmt = get_quoted_string($lines[$count - 1], raw_line($count, 0));
6808 while ($fmt =~ /(\%[\*\d\.]*p(\w)(\w*))/g) {
6812 if ($extension !~ /[4SsBKRraEehMmIiUDdgVCbGNOxtf]/ ||
6813 ($extension eq "f" &&
6814 defined $qualifier && $qualifier !~ /^w/) ||
6815 ($extension eq "4" &&
6816 defined $qualifier && $qualifier !~ /^cc/)) {
6817 $bad_specifier = $specifier;
6820 if ($extension eq "x" && !defined($stat_real)) {
6821 if (!defined($stat_real)) {
6822 $stat_real = get_stat_real($linenr, $lc);
6824 WARN("VSPRINTF_SPECIFIER_PX",
6825 "Using vsprintf specifier '\%px' potentially exposes the kernel memory layout, if you don't really need the address please consider using '\%p'.\n" . "$here\n$stat_real\n");
6828 if ($bad_specifier ne "") {
6829 my $stat_real = get_stat_real($linenr, $lc);
6830 my $ext_type = "Invalid";
6832 if ($bad_specifier =~ /p[Ff]/) {
6833 $use = " - use %pS instead";
6834 $use =~ s/pS/ps/ if ($bad_specifier =~ /pf/);
6837 WARN("VSPRINTF_POINTER_EXTENSION",
6838 "$ext_type vsprintf pointer extension '$bad_specifier'$use\n" . "$here\n$stat_real\n");
6843 # Check for misused memsets
6844 if ($perl_version_ok &&
6846 $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*$FuncArg\s*\)/) {
6852 if ($ms_size =~ /^(0x|)0$/i) {
6854 "memset to 0's uses 0 as the 2nd argument, not the 3rd\n" . "$here\n$stat\n");
6855 } elsif ($ms_size =~ /^(0x|)1$/i) {
6857 "single byte memset is suspicious. Swapped 2nd/3rd argument?\n" . "$here\n$stat\n");
6861 # Check for memcpy(foo, bar, ETH_ALEN) that could be ether_addr_copy(foo, bar)
6862 # if ($perl_version_ok &&
6864 # $stat =~ /^\+(?:.*?)\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
6865 # if (WARN("PREFER_ETHER_ADDR_COPY",
6866 # "Prefer ether_addr_copy() over memcpy() if the Ethernet addresses are __aligned(2)\n" . "$here\n$stat\n") &&
6868 # $fixed[$fixlinenr] =~ s/\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/ether_addr_copy($2, $7)/;
6872 # Check for memcmp(foo, bar, ETH_ALEN) that could be ether_addr_equal*(foo, bar)
6873 # if ($perl_version_ok &&
6875 # $stat =~ /^\+(?:.*?)\bmemcmp\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
6876 # WARN("PREFER_ETHER_ADDR_EQUAL",
6877 # "Prefer ether_addr_equal() or ether_addr_equal_unaligned() over memcmp()\n" . "$here\n$stat\n")
6880 # check for memset(foo, 0x0, ETH_ALEN) that could be eth_zero_addr
6881 # check for memset(foo, 0xFF, ETH_ALEN) that could be eth_broadcast_addr
6882 # if ($perl_version_ok &&
6884 # $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
6888 # if ($ms_val =~ /^(?:0x|)0+$/i) {
6889 # if (WARN("PREFER_ETH_ZERO_ADDR",
6890 # "Prefer eth_zero_addr over memset()\n" . "$here\n$stat\n") &&
6892 # $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_zero_addr($2)/;
6894 # } elsif ($ms_val =~ /^(?:0xff|255)$/i) {
6895 # if (WARN("PREFER_ETH_BROADCAST_ADDR",
6896 # "Prefer eth_broadcast_addr() over memset()\n" . "$here\n$stat\n") &&
6898 # $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_broadcast_addr($2)/;
6903 # strlcpy uses that should likely be strscpy
6904 if ($line =~ /\bstrlcpy\s*\(/) {
6906 "Prefer strscpy over strlcpy - see: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw\@mail.gmail.com/\n" . $herecurr);
6909 # typecasts on min/max could be min_t/max_t
6910 if ($perl_version_ok &&
6912 $stat =~ /^\+(?:.*?)\b(min|max)\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\)/) {
6913 if (defined $2 || defined $7) {
6915 my $cast1 = deparenthesize($2);
6917 my $cast2 = deparenthesize($7);
6921 if ($cast1 ne "" && $cast2 ne "" && $cast1 ne $cast2) {
6922 $cast = "$cast1 or $cast2";
6923 } elsif ($cast1 ne "") {
6929 "$call() should probably be ${call}_t($cast, $arg1, $arg2)\n" . "$here\n$stat\n");
6933 # check usleep_range arguments
6934 if ($perl_version_ok &&
6936 $stat =~ /^\+(?:.*?)\busleep_range\s*\(\s*($FuncArg)\s*,\s*($FuncArg)\s*\)/) {
6940 WARN("USLEEP_RANGE",
6941 "usleep_range should not use min == max args; see Documentation/timers/timers-howto.rst\n" . "$here\n$stat\n");
6942 } elsif ($min =~ /^\d+$/ && $max =~ /^\d+$/ &&
6944 WARN("USLEEP_RANGE",
6945 "usleep_range args reversed, use min then max; see Documentation/timers/timers-howto.rst\n" . "$here\n$stat\n");
6949 # check for naked sscanf
6950 if ($perl_version_ok &&
6952 $line =~ /\bsscanf\b/ &&
6953 ($stat !~ /$Ident\s*=\s*sscanf\s*$balanced_parens/ &&
6954 $stat !~ /\bsscanf\s*$balanced_parens\s*(?:$Compare)/ &&
6955 $stat !~ /(?:$Compare)\s*\bsscanf\s*$balanced_parens/)) {
6956 my $lc = $stat =~ tr@\n@@;
6957 $lc = $lc + $linenr;
6958 my $stat_real = get_stat_real($linenr, $lc);
6959 WARN("NAKED_SSCANF",
6960 "unchecked sscanf return value\n" . "$here\n$stat_real\n");
6963 # check for simple sscanf that should be kstrto<foo>
6964 if ($perl_version_ok &&
6966 $line =~ /\bsscanf\b/) {
6967 my $lc = $stat =~ tr@\n@@;
6968 $lc = $lc + $linenr;
6969 my $stat_real = get_stat_real($linenr, $lc);
6970 if ($stat_real =~ /\bsscanf\b\s*\(\s*$FuncArg\s*,\s*("[^"]+")/) {
6972 my $count = $format =~ tr@%@%@;
6974 $format =~ /^"\%(?i:ll[udxi]|[udxi]ll|ll|[hl]h?[udxi]|[udxi][hl]h?|[hl]h?|[udxi])"$/) {
6975 WARN("SSCANF_TO_KSTRTO",
6976 "Prefer kstrto<type> to single variable sscanf\n" . "$here\n$stat_real\n");
6981 # check for new externs in .h files.
6982 if ($realfile =~ /\.h$/ &&
6983 $line =~ /^\+\s*(extern\s+)$Type\s*$Ident\s*\(/s) {
6984 if (CHK("AVOID_EXTERNS",
6985 "extern prototypes should be avoided in .h files\n" . $herecurr) &&
6987 $fixed[$fixlinenr] =~ s/(.*)\bextern\b\s*(.*)/$1$2/;
6991 # check for new externs in .c files.
6992 if ($realfile =~ /\.c$/ && defined $stat &&
6993 $stat =~ /^.\s*(?:extern\s+)?$Type\s+($Ident)(\s*)\(/s)
6995 my $function_name = $1;
6996 my $paren_space = $2;
6999 if (defined $cond) {
7000 substr($s, 0, length($cond), '');
7004 WARN("AVOID_EXTERNS",
7005 "externs should be avoided in .c files\n" . $herecurr);
7008 if ($paren_space =~ /\n/) {
7009 WARN("FUNCTION_ARGUMENTS",
7010 "arguments for function declarations should follow identifier\n" . $herecurr);
7013 } elsif ($realfile =~ /\.c$/ && defined $stat &&
7014 $stat =~ /^.\s*extern\s+/)
7016 WARN("AVOID_EXTERNS",
7017 "externs should be avoided in .c files\n" . $herecurr);
7020 # check for function declarations that have arguments without identifier names
7021 if (defined $stat &&
7022 $stat =~ /^.\s*(?:extern\s+)?$Type\s*(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*\(\s*([^{]+)\s*\)\s*;/s &&
7024 my $args = trim($1);
7025 while ($args =~ m/\s*($Type\s*(?:$Ident|\(\s*\*\s*$Ident?\s*\)\s*$balanced_parens)?)/g) {
7027 if ($arg =~ /^$Type$/ && $arg !~ /enum\s+$Ident$/) {
7028 WARN("FUNCTION_ARGUMENTS",
7029 "function definition argument '$arg' should also have an identifier name\n" . $herecurr);
7034 # check for function definitions
7035 if ($perl_version_ok &&
7037 $stat =~ /^.\s*(?:$Storage\s+)?$Type\s*($Ident)\s*$balanced_parens\s*{/s) {
7038 $context_function = $1;
7040 # check for multiline function definition with misplaced open brace
7042 my $cnt = statement_rawlines($stat);
7043 my $herectx = $here . "\n";
7044 for (my $n = 0; $n < $cnt; $n++) {
7045 my $rl = raw_line($linenr, $n);
7046 $herectx .= $rl . "\n";
7047 $ok = 1 if ($rl =~ /^[ \+]\{/);
7048 $ok = 1 if ($rl =~ /\{/ && $n == 0);
7049 last if $rl =~ /^[ \+].*\{/;
7053 "open brace '{' following function definitions go on the next line\n" . $herectx);
7057 # checks for new __setup's
7058 if ($rawline =~ /\b__setup\("([^"]*)"/) {
7061 if (!grep(/$name/, @setup_docs)) {
7062 CHK("UNDOCUMENTED_SETUP",
7063 "__setup appears un-documented -- check Documentation/admin-guide/kernel-parameters.txt\n" . $herecurr);
7067 # check for pointless casting of alloc functions
7068 if ($line =~ /\*\s*\)\s*$allocFunctions\b/) {
7069 WARN("UNNECESSARY_CASTS",
7070 "unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
7074 # p = alloc(sizeof(struct foo), ...) should be p = alloc(sizeof(*p), ...)
7075 if ($perl_version_ok &&
7076 $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*((?:kv|k|v)[mz]alloc(?:_node)?)\s*\(\s*(sizeof\s*\(\s*struct\s+$Lval\s*\))/) {
7077 CHK("ALLOC_SIZEOF_STRUCT",
7078 "Prefer $3(sizeof(*$1)...) over $3($4...)\n" . $herecurr);
7081 # check for (kv|k)[mz]alloc with multiplies that could be kmalloc_array/kvmalloc_array/kvcalloc/kcalloc
7082 if ($perl_version_ok &&
7084 $stat =~ /^\+\s*($Lval)\s*\=\s*(?:$balanced_parens)?\s*((?:kv|k)[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)\s*,/) {
7088 my $newfunc = "kmalloc_array";
7089 $newfunc = "kvmalloc_array" if ($oldfunc eq "kvmalloc");
7090 $newfunc = "kvcalloc" if ($oldfunc eq "kvzalloc");
7091 $newfunc = "kcalloc" if ($oldfunc eq "kzalloc");
7094 if ($a1 =~ /^sizeof\s*\S/) {
7098 if ($r1 !~ /^sizeof\b/ && $r2 =~ /^sizeof\s*\S/ &&
7099 !($r1 =~ /^$Constant$/ || $r1 =~ /^[A-Z_][A-Z0-9_]*$/)) {
7100 my $cnt = statement_rawlines($stat);
7101 my $herectx = get_stat_here($linenr, $cnt, $here);
7103 if (WARN("ALLOC_WITH_MULTIPLY",
7104 "Prefer $newfunc over $oldfunc with multiply\n" . $herectx) &&
7107 $fixed[$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;
7112 # check for krealloc arg reuse
7113 if ($perl_version_ok &&
7114 $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*krealloc\s*\(\s*($Lval)\s*,/ &&
7116 WARN("KREALLOC_ARG_REUSE",
7117 "Reusing the krealloc arg is almost always a bug\n" . $herecurr);
7120 # check for alloc argument mismatch
7121 if ($line =~ /\b((?:devm_)?(?:kcalloc|kmalloc_array))\s*\(\s*sizeof\b/) {
7122 WARN("ALLOC_ARRAY_ARGS",
7123 "$1 uses number as first arg, sizeof is generally wrong\n" . $herecurr);
7126 # check for multiple semicolons
7127 if ($line =~ /;\s*;\s*$/) {
7128 if (WARN("ONE_SEMICOLON",
7129 "Statements terminations use 1 semicolon\n" . $herecurr) &&
7131 $fixed[$fixlinenr] =~ s/(\s*;\s*){2,}$/;/g;
7135 # check for #defines like: 1 << <digit> that could be BIT(digit), it is not exported to uapi
7136 if ($realfile !~ m@^include/uapi/@ &&
7137 $line =~ /#\s*define\s+\w+\s+\(?\s*1\s*([ulUL]*)\s*\<\<\s*(?:\d+|$Ident)\s*\)?/) {
7139 $ull = "_ULL" if (defined($1) && $1 =~ /ll/i);
7140 if (CHK("BIT_MACRO",
7141 "Prefer using the BIT$ull macro\n" . $herecurr) &&
7143 $fixed[$fixlinenr] =~ s/\(?\s*1\s*[ulUL]*\s*<<\s*(\d+|$Ident)\s*\)?/BIT${ull}($1)/;
7147 # check for IS_ENABLED() without CONFIG_<FOO> ($rawline for comments too)
7148 if ($rawline =~ /\bIS_ENABLED\s*\(\s*(\w+)\s*\)/ && $1 !~ /^${CONFIG_}/) {
7149 WARN("IS_ENABLED_CONFIG",
7150 "IS_ENABLED($1) is normally used as IS_ENABLED(${CONFIG_}$1)\n" . $herecurr);
7153 # check for #if defined CONFIG_<FOO> || defined CONFIG_<FOO>_MODULE
7154 if ($line =~ /^\+\s*#\s*if\s+defined(?:\s*\(?\s*|\s+)(${CONFIG_}[A-Z_]+)\s*\)?\s*\|\|\s*defined(?:\s*\(?\s*|\s+)\1_MODULE\s*\)?\s*$/) {
7156 if (WARN("PREFER_IS_ENABLED",
7157 "Prefer IS_ENABLED(<FOO>) to ${CONFIG_}<FOO> || ${CONFIG_}<FOO>_MODULE\n" . $herecurr) &&
7159 $fixed[$fixlinenr] = "\+#if IS_ENABLED($config)";
7163 # check for /* fallthrough */ like comment, prefer fallthrough;
7164 my @fallthroughs = (
7167 'lint -fallthrough[ \t]*',
7168 'intentional(?:ly)?[ \t]*fall(?:(?:s | |-)[Tt]|t)hr(?:ough|u|ew)',
7169 '(?:else,?\s*)?FALL(?:S | |-)?THR(?:OUGH|U|EW)[ \t.!]*(?:-[^\n\r]*)?',
7170 'Fall(?:(?:s | |-)[Tt]|t)hr(?:ough|u|ew)[ \t.!]*(?:-[^\n\r]*)?',
7171 'fall(?:s | |-)?thr(?:ough|u|ew)[ \t.!]*(?:-[^\n\r]*)?',
7173 if ($raw_comment ne '') {
7174 foreach my $ft (@fallthroughs) {
7175 if ($raw_comment =~ /$ft/) {
7176 my $msg_level = \&WARN;
7177 $msg_level = \&CHK if ($file);
7178 &{$msg_level}("PREFER_FALLTHROUGH",
7179 "Prefer 'fallthrough;' over fallthrough comment\n" . $herecurr);
7185 # check for switch/default statements without a break;
7186 if ($perl_version_ok &&
7188 $stat =~ /^\+[$;\s]*(?:case[$;\s]+\w+[$;\s]*:[$;\s]*|)*[$;\s]*\bdefault[$;\s]*:[$;\s]*;/g) {
7189 my $cnt = statement_rawlines($stat);
7190 my $herectx = get_stat_here($linenr, $cnt, $here);
7192 WARN("DEFAULT_NO_BREAK",
7193 "switch default: should use break\n" . $herectx);
7196 # check for gcc specific __FUNCTION__
7197 if ($line =~ /\b__FUNCTION__\b/) {
7198 if (WARN("USE_FUNC",
7199 "__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr) &&
7201 $fixed[$fixlinenr] =~ s/\b__FUNCTION__\b/__func__/g;
7205 # check for uses of __DATE__, __TIME__, __TIMESTAMP__
7206 while ($line =~ /\b(__(?:DATE|TIME|TIMESTAMP)__)\b/g) {
7208 "Use of the '$1' macro makes the build non-deterministic\n" . $herecurr);
7211 # check for use of yield()
7212 if ($line =~ /\byield\s*\(\s*\)/) {
7214 "Using yield() is generally wrong. See yield() kernel-doc (sched/core.c)\n" . $herecurr);
7217 # check for comparisons against true and false
7218 if ($line =~ /\+\s*(.*?)\b(true|false|$Lval)\s*(==|\!=)\s*(true|false|$Lval)\b(.*)$/i) {
7226 ($arg, $otype) = ($otype, $arg) if ($arg =~ /^(?:true|false)$/i);
7228 my $type = lc($otype);
7229 if ($type =~ /^(?:true|false)$/) {
7230 if (("$test" eq "==" && "$type" eq "true") ||
7231 ("$test" eq "!=" && "$type" eq "false")) {
7235 CHK("BOOL_COMPARISON",
7236 "Using comparison to $otype is error prone\n" . $herecurr);
7238 ## maybe suggesting a correct construct would better
7239 ## "Using comparison to $otype is error prone. Perhaps use '${lead}${op}${arg}${trail}'\n" . $herecurr);
7244 # check for semaphores initialized locked
7245 if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) {
7246 WARN("CONSIDER_COMPLETION",
7247 "consider using a completion\n" . $herecurr);
7250 # recommend kstrto* over simple_strto* and strict_strto*
7251 if ($line =~ /\b((simple|strict)_(strto(l|ll|ul|ull)))\s*\(/) {
7252 WARN("CONSIDER_KSTRTO",
7253 "$1 is obsolete, use k$3 instead\n" . $herecurr);
7256 # check for __initcall(), use device_initcall() explicitly or more appropriate function please
7257 if ($line =~ /^.\s*__initcall\s*\(/) {
7258 WARN("USE_DEVICE_INITCALL",
7259 "please use device_initcall() or more appropriate function instead of __initcall() (see include/linux/init.h)\n" . $herecurr);
7262 # check for spin_is_locked(), suggest lockdep instead
7263 if ($line =~ /\bspin_is_locked\(/) {
7265 "Where possible, use lockdep_assert_held instead of assertions based on spin_is_locked\n" . $herecurr);
7268 # check for deprecated apis
7269 if ($line =~ /\b($deprecated_apis_search)\b\s*\(/) {
7270 my $deprecated_api = $1;
7271 my $new_api = $deprecated_apis{$deprecated_api};
7272 WARN("DEPRECATED_API",
7273 "Deprecated use of '$deprecated_api', prefer '$new_api' instead\n" . $herecurr);
7276 # check for various structs that are normally const (ops, kgdb, device_tree)
7277 # and avoid what seem like struct definitions 'struct foo {'
7278 if (defined($const_structs) &&
7279 $line !~ /\bconst\b/ &&
7280 $line =~ /\bstruct\s+($const_structs)\b(?!\s*\{)/) {
7281 WARN("CONST_STRUCT",
7282 "struct $1 should normally be const\n" . $herecurr);
7285 # use of NR_CPUS is usually wrong
7286 # ignore definitions of NR_CPUS and usage to define arrays as likely right
7287 # ignore designated initializers using NR_CPUS
7288 if ($line =~ /\bNR_CPUS\b/ &&
7289 $line !~ /^.\s*\s*#\s*if\b.*\bNR_CPUS\b/ &&
7290 $line !~ /^.\s*\s*#\s*define\b.*\bNR_CPUS\b/ &&
7291 $line !~ /^.\s*$Declare\s.*\[[^\]]*NR_CPUS[^\]]*\]/ &&
7292 $line !~ /\[[^\]]*\.\.\.[^\]]*NR_CPUS[^\]]*\]/ &&
7293 $line !~ /\[[^\]]*NR_CPUS[^\]]*\.\.\.[^\]]*\]/ &&
7294 $line !~ /^.\s*\.\w+\s*=\s*.*\bNR_CPUS\b/)
7297 "usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc\n" . $herecurr);
7300 # Use of __ARCH_HAS_<FOO> or ARCH_HAVE_<BAR> is wrong.
7301 if ($line =~ /\+\s*#\s*define\s+((?:__)?ARCH_(?:HAS|HAVE)\w*)\b/) {
7302 ERROR("DEFINE_ARCH_HAS",
7303 "#define of '$1' is wrong - use Kconfig variables or standard guards instead\n" . $herecurr);
7306 # likely/unlikely comparisons similar to "(likely(foo) > 0)"
7307 if ($perl_version_ok &&
7308 $line =~ /\b((?:un)?likely)\s*\(\s*$FuncArg\s*\)\s*$Compare/) {
7309 WARN("LIKELY_MISUSE",
7310 "Using $1 should generally have parentheses around the comparison\n" . $herecurr);
7313 # return sysfs_emit(foo, fmt, ...) fmt without newline
7314 if ($line =~ /\breturn\s+sysfs_emit\s*\(\s*$FuncArg\s*,\s*($String)/ &&
7315 substr($rawline, $-[6], $+[6] - $-[6]) !~ /\\n"$/) {
7316 my $offset = $+[6] - 1;
7317 if (WARN("SYSFS_EMIT",
7318 "return sysfs_emit(...) formats should include a terminating newline\n" . $herecurr) &&
7320 substr($fixed[$fixlinenr], $offset, 0) = '\\n';
7324 # nested likely/unlikely calls
7325 if ($line =~ /\b(?:(?:un)?likely)\s*\(\s*!?\s*(IS_ERR(?:_OR_NULL|_VALUE)?|WARN)/) {
7326 WARN("LIKELY_MISUSE",
7327 "nested (un)?likely() calls, $1 already uses unlikely() internally\n" . $herecurr);
7330 # whine mightly about in_atomic
7331 if ($line =~ /\bin_atomic\s*\(/) {
7332 if ($realfile =~ m@^drivers/@) {
7334 "do not use in_atomic in drivers\n" . $herecurr);
7335 } elsif ($realfile !~ m@^kernel/@) {
7337 "use of in_atomic() is incorrect outside core kernel code\n" . $herecurr);
7341 # check for lockdep_set_novalidate_class
7342 if ($line =~ /^.\s*lockdep_set_novalidate_class\s*\(/ ||
7343 $line =~ /__lockdep_no_validate__\s*\)/ ) {
7344 if ($realfile !~ m@^kernel/lockdep@ &&
7345 $realfile !~ m@^include/linux/lockdep@ &&
7346 $realfile !~ m@^drivers/base/core@) {
7348 "lockdep_no_validate class is reserved for device->mutex.\n" . $herecurr);
7352 if ($line =~ /debugfs_create_\w+.*\b$mode_perms_world_writable\b/ ||
7353 $line =~ /DEVICE_ATTR.*\b$mode_perms_world_writable\b/) {
7354 WARN("EXPORTED_WORLD_WRITABLE",
7355 "Exporting world writable files is usually an error. Consider more restrictive permissions.\n" . $herecurr);
7358 # check for DEVICE_ATTR uses that could be DEVICE_ATTR_<FOO>
7359 # and whether or not function naming is typical and if
7360 # DEVICE_ATTR permissions uses are unusual too
7361 if ($perl_version_ok &&
7363 $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*\)/) {
7368 my $octal_perms = perms_to_octal($perms);
7369 if ($show =~ /^${var}_show$/ &&
7370 $store =~ /^${var}_store$/ &&
7371 $octal_perms eq "0644") {
7372 if (WARN("DEVICE_ATTR_RW",
7373 "Use DEVICE_ATTR_RW\n" . $herecurr) &&
7375 $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*$store\s*\)/DEVICE_ATTR_RW(${var})/;
7377 } elsif ($show =~ /^${var}_show$/ &&
7378 $store =~ /^NULL$/ &&
7379 $octal_perms eq "0444") {
7380 if (WARN("DEVICE_ATTR_RO",
7381 "Use DEVICE_ATTR_RO\n" . $herecurr) &&
7383 $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*NULL\s*\)/DEVICE_ATTR_RO(${var})/;
7385 } elsif ($show =~ /^NULL$/ &&
7386 $store =~ /^${var}_store$/ &&
7387 $octal_perms eq "0200") {
7388 if (WARN("DEVICE_ATTR_WO",
7389 "Use DEVICE_ATTR_WO\n" . $herecurr) &&
7391 $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*NULL\s*,\s*$store\s*\)/DEVICE_ATTR_WO(${var})/;
7393 } elsif ($octal_perms eq "0644" ||
7394 $octal_perms eq "0444" ||
7395 $octal_perms eq "0200") {
7396 my $newshow = "$show";
7397 $newshow = "${var}_show" if ($show ne "NULL" && $show ne "${var}_show");
7398 my $newstore = $store;
7399 $newstore = "${var}_store" if ($store ne "NULL" && $store ne "${var}_store");
7401 if ($show ne $newshow) {
7402 $rename .= " '$show' to '$newshow'";
7404 if ($store ne $newstore) {
7405 $rename .= " '$store' to '$newstore'";
7407 WARN("DEVICE_ATTR_FUNCTIONS",
7408 "Consider renaming function(s)$rename\n" . $herecurr);
7410 WARN("DEVICE_ATTR_PERMS",
7411 "DEVICE_ATTR unusual permissions '$perms' used\n" . $herecurr);
7415 # Mode permission misuses where it seems decimal should be octal
7416 # This uses a shortcut match to avoid unnecessary uses of a slow foreach loop
7417 # o Ignore module_param*(...) uses with a decimal 0 permission as that has a
7418 # specific definition of not visible in sysfs.
7419 # o Ignore proc_create*(...) uses with a decimal 0 permission as that means
7420 # use the default permissions
7421 if ($perl_version_ok &&
7423 $line =~ /$mode_perms_search/) {
7424 foreach my $entry (@mode_permission_funcs) {
7425 my $func = $entry->[0];
7426 my $arg_pos = $entry->[1];
7428 my $lc = $stat =~ tr@\n@@;
7429 $lc = $lc + $linenr;
7430 my $stat_real = get_stat_real($linenr, $lc);
7435 $skip_args = "(?:\\s*$FuncArg\\s*,\\s*){$arg_pos,$arg_pos}";
7437 my $test = "\\b$func\\s*\\(${skip_args}($FuncArg(?:\\|\\s*$FuncArg)*)\\s*[,\\)]";
7438 if ($stat =~ /$test/) {
7440 $val = $6 if ($skip_args ne "");
7441 if (!($func =~ /^(?:module_param|proc_create)/ && $val eq "0") &&
7442 (($val =~ /^$Int$/ && $val !~ /^$Octal$/) ||
7443 ($val =~ /^$Octal$/ && length($val) ne 4))) {
7444 ERROR("NON_OCTAL_PERMISSIONS",
7445 "Use 4 digit octal (0777) not decimal permissions\n" . "$here\n" . $stat_real);
7447 if ($val =~ /^$Octal$/ && (oct($val) & 02)) {
7448 ERROR("EXPORTED_WORLD_WRITABLE",
7449 "Exporting writable files is usually an error. Consider more restrictive permissions.\n" . "$here\n" . $stat_real);
7455 # check for uses of S_<PERMS> that could be octal for readability
7456 while ($line =~ m{\b($multi_mode_perms_string_search)\b}g) {
7458 my $octal = perms_to_octal($oval);
7459 if (WARN("SYMBOLIC_PERMS",
7460 "Symbolic permissions '$oval' are not preferred. Consider using octal permissions '$octal'.\n" . $herecurr) &&
7462 $fixed[$fixlinenr] =~ s/\Q$oval\E/$octal/;
7466 # validate content of MODULE_LICENSE against list from include/linux/module.h
7467 if ($line =~ /\bMODULE_LICENSE\s*\(\s*($String)\s*\)/) {
7468 my $extracted_string = get_quoted_string($line, $rawline);
7469 my $valid_licenses = qr{
7472 GPL\ and\ additional\ rights|
7478 if ($extracted_string !~ /^"(?:$valid_licenses)"$/x) {
7479 WARN("MODULE_LICENSE",
7480 "unknown module license " . $extracted_string . "\n" . $herecurr);
7482 if (!$file && $extracted_string eq '"GPL v2"') {
7483 if (WARN("MODULE_LICENSE",
7484 "Prefer \"GPL\" over \"GPL v2\" - see commit bf7fbeeae6db (\"module: Cure the MODULE_LICENSE \"GPL\" vs. \"GPL v2\" bogosity\")\n" . $herecurr) &&
7486 $fixed[$fixlinenr] =~ s/\bMODULE_LICENSE\s*\(\s*"GPL v2"\s*\)/MODULE_LICENSE("GPL")/;
7491 # check for sysctl duplicate constants
7492 if ($line =~ /\.extra[12]\s*=\s*&(zero|one|int_max)\b/) {
7493 WARN("DUPLICATED_SYSCTL_CONST",
7494 "duplicated sysctl range checking value '$1', consider using the shared one in include/linux/sysctl.h\n" . $herecurr);
7498 # If we have no input at all, then there is nothing to report on
7499 # so just keep quiet.
7500 if ($#rawlines == -1) {
7504 # In mailback mode only produce a report in the negative, for
7505 # things that appear to be patches.
7506 if ($mailback && ($clean == 1 || !$is_patch)) {
7510 # This is not a patch, and we are in 'no-patch' mode so
7512 if (!$chk_patch && !$is_patch) {
7516 if (!$is_patch && $filename !~ /cover-letter\.patch$/) {
7517 ERROR("NOT_UNIFIED_DIFF",
7518 "Does not appear to be a unified-diff format patch\n");
7520 if ($is_patch && $has_commit_log && $chk_signoff) {
7521 if ($signoff == 0) {
7522 ERROR("MISSING_SIGN_OFF",
7523 "Missing Signed-off-by: line(s)\n");
7524 } elsif ($authorsignoff != 1) {
7525 # authorsignoff values:
7526 # 0 -> missing sign off
7527 # 1 -> sign off identical
7528 # 2 -> names and addresses match, comments mismatch
7529 # 3 -> addresses match, names different
7530 # 4 -> names match, addresses different
7531 # 5 -> names match, addresses excluding subaddress details (refer RFC 5233) match
7533 my $sob_msg = "'From: $author' != 'Signed-off-by: $author_sob'";
7535 if ($authorsignoff == 0) {
7536 ERROR("NO_AUTHOR_SIGN_OFF",
7537 "Missing Signed-off-by: line by nominal patch author '$author'\n");
7538 } elsif ($authorsignoff == 2) {
7539 CHK("FROM_SIGN_OFF_MISMATCH",
7540 "From:/Signed-off-by: email comments mismatch: $sob_msg\n");
7541 } elsif ($authorsignoff == 3) {
7542 WARN("FROM_SIGN_OFF_MISMATCH",
7543 "From:/Signed-off-by: email name mismatch: $sob_msg\n");
7544 } elsif ($authorsignoff == 4) {
7545 WARN("FROM_SIGN_OFF_MISMATCH",
7546 "From:/Signed-off-by: email address mismatch: $sob_msg\n");
7547 } elsif ($authorsignoff == 5) {
7548 WARN("FROM_SIGN_OFF_MISMATCH",
7549 "From:/Signed-off-by: email subaddress mismatch: $sob_msg\n");
7554 print report_dump();
7555 if ($summary && !($clean == 1 && $quiet == 1)) {
7556 print "$filename " if ($summary_file);
7557 print "total: $cnt_error errors, $cnt_warn warnings, " .
7558 (($check)? "$cnt_chk checks, " : "") .
7559 "$cnt_lines lines checked\n";
7563 # If there were any defects found and not already fixing them
7564 if (!$clean and !$fix) {
7567 NOTE: For some of the reported defects, checkpatch may be able to
7568 mechanically convert to the typical style using --fix or --fix-inplace.
7571 # If there were whitespace errors which cleanpatch can fix
7572 # then suggest that.
7573 if ($rpt_cleaners) {
7577 NOTE: Whitespace errors detected.
7578 You may wish to use scripts/cleanpatch or scripts/cleanfile
7583 if ($clean == 0 && $fix &&
7584 ("@rawlines" ne "@fixed" ||
7585 $#fixed_inserted >= 0 || $#fixed_deleted >= 0)) {
7586 my $newfile = $filename;
7587 $newfile .= ".EXPERIMENTAL-checkpatch-fixes" if (!$fix_inplace);
7591 @fixed = fix_inserted_deleted_lines(\@fixed, \@fixed_inserted, \@fixed_deleted);
7593 open($f, '>', $newfile)
7594 or die "$P: Can't open $newfile for write\n";
7595 foreach my $fixed_line (@fixed) {
7598 if ($linecount > 3) {
7599 $fixed_line =~ s/^\+//;
7600 print $f $fixed_line . "\n";
7603 print $f $fixed_line . "\n";
7611 Wrote EXPERIMENTAL --fix correction(s) to '$newfile'
7613 Do _NOT_ trust the results written to this file.
7614 Do _NOT_ submit these changes without inspecting them for correctness.
7616 This EXPERIMENTAL file is simply a convenience to help rewrite patches.
7617 No warranties, expressed or implied...
7625 print "$vname has no obvious style problems and is ready for submission.\n";
7627 print "$vname has style problems, please review.\n";