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pthread_mutex_unlock needs to use _rel semantics for atomic ops.
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@ -1,3 +1,9 @@
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2009-07-27 Ulrich Drepper <drepper@redhat.com>
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[BZ #10418]
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* pthread_mutex_unlock.c (__pthread_mutex_unlock_full): Use _rel
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instead of of _acq variants of cmpxchg.
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2009-07-23 Ulrich Drepper <drepper@redhat.com>
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* sysdeps/x86_64/configure.in: New file.
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@ -1,4 +1,4 @@
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/* Copyright (C) 2002, 2003, 2005-2007, 2008 Free Software Foundation, Inc.
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/* Copyright (C) 2002, 2003, 2005-2008, 2009 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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@ -213,7 +213,7 @@ __pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
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/* Unlock. */
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if ((mutex->__data.__lock & FUTEX_WAITERS) != 0
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|| atomic_compare_and_exchange_bool_acq (&mutex->__data.__lock, 0,
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|| atomic_compare_and_exchange_bool_rel (&mutex->__data.__lock, 0,
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THREAD_GETMEM (THREAD_SELF,
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tid)))
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{
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@ -263,7 +263,7 @@ __pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
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oldval = mutex->__data.__lock;
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newval = oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK;
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}
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while (atomic_compare_and_exchange_bool_acq (&mutex->__data.__lock,
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while (atomic_compare_and_exchange_bool_rel (&mutex->__data.__lock,
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newval, oldval));
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if ((oldval & ~PTHREAD_MUTEX_PRIO_CEILING_MASK) > 1)
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