PERFORCE change 64962 for review

[John Baldwin]

http://perforce.freebsd.org/chv.cgi?CH=64962

Change 64962 by jhb at jhb_slimer on 2004/11/12 18:25:42

	Bah, fixes from Bruce for userland use of atomic ops.  Also, UP
	doesn't even need gcc barriers.

Affected files ...

.. //depot/projects/smpng/sys/i386/include/atomic.h#19 edit

Differences ...

==== //depot/projects/smpng/sys/i386/include/atomic.h#19 (text+ko) ====

@@ -172,7 +172,7 @@
 
 #if defined(__GNUC__) || defined(__INTEL_COMPILER)
 
-#if !defined(SMP)
+#if defined(KERNEL) && !defined(SMP)
 
 /*
  * We assume that a = b will do atomic loads and stores.  However, on a
@@ -191,7 +191,6 @@
 static __inline void					\
 atomic_store_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
 {							\
-	__asm __volatile("" : : : "memory");		\
 	*p = v;						\
 }							\
 struct __hack