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authorTulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>2016-10-28 18:31:24 -0200
committerTulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>2016-10-28 19:13:21 -0200
commit739e14f9009ff91e4a8d01776e7269fc8cbd0293 (patch)
treeb8819e16088ba37dcc26c7cfa7f1ae486b7e474f /sysdeps/powerpc
parentce193f551ec21df85c934626a21730881484dcf0 (diff)
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Document a behavior of an elided pthread_rwlock_unlock
Explain that pthread_rwlock_unlock may crash if called on a lock not
held by the current thread.
Diffstat (limited to 'sysdeps/powerpc')
-rw-r--r--sysdeps/powerpc/nptl/elide.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/powerpc/nptl/elide.h b/sysdeps/powerpc/nptl/elide.h
index 77bd82ecba..835fd92968 100644
--- a/sysdeps/powerpc/nptl/elide.h
+++ b/sysdeps/powerpc/nptl/elide.h
@@ -102,6 +102,9 @@ __elide_unlock (int is_lock_free)
 {
   if (is_lock_free)
     {
+      /* This code is expected to crash when trying to unlock a lock not
+	 held by this thread.  More information is available in the
+	 __pthread_rwlock_unlock() implementation.  */
       __libc_tend (0);
       return true;
     }