2008-08-02 Roland McGrath <roland@frob.com>

	* 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 d78662817005044645c1a4279a55e9fec8b49a9b..ca87647254061031280e30c41de73daf91b28464 100644 (file)
--- 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;
 }