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From: John Baldwin <jhb@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
Subject: PERFORCE change 72654 for review
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http://perforce.freebsd.org/chv.cgi?CH=72654

Change 72654 by jhb@jhb_slimer on 2005/03/07 20:23:28

	Clobber just the memory being modified, not all memory.

Affected files ...

.. //depot/projects/smpng/sys/arm/include/atomic.h#6 edit

Differences ...

==== //depot/projects/smpng/sys/arm/include/atomic.h#6 (text+ko) ====

@@ -74,8 +74,8 @@
 static __inline uint32_t
 __swp(uint32_t val, volatile uint32_t *ptr)
 {
-	__asm __volatile("swp	%0, %1, [%2]"
-	    : "=&r" (val) : "r" (val) , "r" (ptr) : "memory");
+	__asm __volatile("swp	%0, %2, [%3]"
+	    : "=&r" (val), "=m" (*ptr) : "r" (val) , "r" (ptr), "m" (*ptr));
 	return (val);
 }