From a3615024b9b204a124429a73d82827b189faaada Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Thu, 8 Sep 2005 17:41:56 +0000
Subject: * sysdeps/unix/sysv/linux/powerpc/lowlevellock.h (FUTEX_WAKE_OP,

	FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
	(lll_futex_wake_unlock): Define.
	* sysdeps/unix/sysv/linux/alpha/lowlevellock.h (FUTEX_WAKE_OP,
	FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
	(lll_futex_wake_unlock): Define.
	* sysdeps/unix/sysv/linux/ia64/lowlevellock.h (FUTEX_WAKE_OP,
	FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
	(lll_futex_wake_unlock): Define.
	* sysdeps/unix/sysv/linux/s390/lowlevellock.h (FUTEX_WAKE_OP,
	FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
	(lll_futex_wake_unlock): Define.
	* sysdeps/unix/sysv/linux/sparc/lowlevellock.h (FUTEX_WAKE_OP,
	FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
	(lll_futex_wake_unlock): Define.
	* sysdeps/pthread/pthread_cond_signal.c (__pthread_cond_signal): Use
	lll_futex_wake_unlock.
	* sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S
	(FUTEX_WAKE_OP, FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
	(__pthread_cond_signal): Use FUTEX_WAKE_OP.
	* sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S
	(FUTEX_WAKE_OP, FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
	(__pthread_cond_signal): Use FUTEX_WAKE_OP.
---
 nptl/sysdeps/pthread/pthread_cond_signal.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'nptl/sysdeps/pthread')

diff --git a/nptl/sysdeps/pthread/pthread_cond_signal.c b/nptl/sysdeps/pthread/pthread_cond_signal.c
index f5623480f8..5a9bbcad91 100644
--- a/nptl/sysdeps/pthread/pthread_cond_signal.c
+++ b/nptl/sysdeps/pthread/pthread_cond_signal.c
@@ -43,6 +43,11 @@ __pthread_cond_signal (cond)
       ++cond->__data.__futex;
 
       /* Wake one.  */
+      if (! __builtin_expect (lll_futex_wake_unlock (&cond->__data.__futex, 1,
+						     1, &cond->__data.__lock),
+						     0))
+	return 0;
+
       lll_futex_wake (&cond->__data.__futex, 1);
     }
 
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