From: Roland McGrath Date: Sat, 2 Aug 2008 20:12:08 +0000 (+0000) Subject: 2008-08-02 Roland McGrath X-Git-Tag: cvs/fedora-glibc-20080828T1623~31 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4c8ac84562fb039586f0ed91280c7fa79a913029;p=thirdparty%2Fglibc.git 2008-08-02 Roland McGrath * sysdeps/mach/i386/machine-lock.h (__spin_unlock, __spin_try_lock): Add memory clobbers. --- diff --git a/sysdeps/mach/i386/machine-lock.h b/sysdeps/mach/i386/machine-lock.h index d7866281700..ca876472540 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; }