X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=m4%2Fpthread_rwlock_rdlock.m4;h=6812b4f4e24b00b8f91520dd3323aebe0f001d48;hb=refs%2Fheads%2Fupstream;hp=9c1d5d019317b5a8dc608040012df1dae9387dc5;hpb=a8a88eddaa90432e6ec1b8d9d5c9842bc91afd1d;p=debian%2Fgzip

diff --git a/m4/pthread_rwlock_rdlock.m4 b/m4/pthread_rwlock_rdlock.m4
index 9c1d5d0..6812b4f 100644
--- a/m4/pthread_rwlock_rdlock.m4
+++ b/m4/pthread_rwlock_rdlock.m4
@@ -1,4 +1,4 @@
-# pthread_rwlock_rdlock.m4 serial 1
+# pthread_rwlock_rdlock.m4 serial 2
 dnl Copyright (C) 2017-2018 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -23,12 +23,14 @@ dnl time, a phenomenon called "writer starvation".
 dnl Without such a guarantee, applications have a hard time avoiding writer
 dnl starvation.
 dnl
-dnl POSIX:2008 makes this requirement only for implementations that support TPS
+dnl POSIX:2017 makes this requirement only for implementations that support TPS
 dnl (Thread Priority Scheduling) and only for the scheduling policies SCHED_FIFO
 dnl and SCHED_RR, see
 dnl http://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_rwlock_rdlock.html
-dnl but test verifies the guarantee regardless of TPS and regardless of
+dnl but this test verifies the guarantee regardless of TPS and regardless of
 dnl scheduling policy.
+dnl Glibc currently does not provide this guarantee, see
+dnl https://sourceware.org/bugzilla/show_bug.cgi?id=13701
 AC_DEFUN([gl_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER],
 [
   AC_REQUIRE([gl_THREADLIB_EARLY])