From 4c8ac84562fb039586f0ed91280c7fa79a913029 Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 2 Aug 2008 20:12:08 +0000 Subject: 2008-08-02 Roland McGrath * sysdeps/mach/i386/machine-lock.h (__spin_unlock, __spin_try_lock): Add memory clobbers. --- sysdeps/mach/i386/machine-lock.h | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'sysdeps/mach') diff --git a/sysdeps/mach/i386/machine-lock.h b/sysdeps/mach/i386/machine-lock.h index d786628170..ca87647254 100644 --- a/sysdeps/mach/i386/machine-lock.h +++ b/sysdeps/mach/i386/machine-lock.h @@ -1,5 +1,5 @@ /* Machine-specific definition for spin locks. i386 version. - Copyright (C) 1994, 1997, 2007 Free Software Foundation, Inc. + Copyright (C) 1994,1997,2007,2008 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -40,7 +40,8 @@ __spin_unlock (__spin_lock_t *__lock) { register int __unlocked; __asm__ __volatile ("xchgl %0, %1" - : "=&r" (__unlocked), "=m" (*__lock) : "0" (0)); + : "=&r" (__unlocked), "=m" (*__lock) : "0" (0) + : : "memory"); } /* Try to lock LOCK; return nonzero if we locked it, zero if another has. */ @@ -50,7 +51,8 @@ __spin_try_lock (__spin_lock_t *__lock) { register int __locked; __asm__ __volatile ("xchgl %0, %1" - : "=&r" (__locked), "=m" (*__lock) : "0" (1)); + : "=&r" (__locked), "=m" (*__lock) : "0" (1) + : : "memory"); return !__locked; } -- cgit v1.2.3