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| author | Roland McGrath <roland@gnu.org> | 2008-08-02 20:12:08 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 2008-08-02 20:12:08 +0000 |
| commit | 4c8ac84562fb039586f0ed91280c7fa79a913029 (patch) | |
| tree | 65b66a46a262ca60e883b9c0356dd5e9173b481c | |
| parent | 48b22986ccb7751b8474189ac1b610265b242c30 (diff) | |
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2008-08-02 Roland McGrath <roland@frob.com>
* sysdeps/mach/i386/machine-lock.h (__spin_unlock, __spin_try_lock):
Add memory clobbers.
| -rw-r--r-- | sysdeps/mach/i386/machine-lock.h | 8 |
1 files changed, 5 insertions, 3 deletions
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; } |