patch-2.4.7 linux/include/asm-sparc64/atomic.h

• Lines: 18
• Date: Thu Jul 19 18:11:13 2001
• Orig file: v2.4.6/linux/include/asm-sparc64/atomic.h
• Orig date: Tue Oct 10 10:33:52 2000

diff -u --recursive --new-file v2.4.6/linux/include/asm-sparc64/atomic.h linux/include/asm-sparc64/atomic.h
@@ -1,4 +1,4 @@
-/* $Id: atomic.h,v 1.21 2000/10/03 07:28:56 anton Exp $
+/* $Id: atomic.h,v 1.22 2001/07/11 23:56:07 davem Exp $
  * atomic.h: Thankfully the V9 is at least reasonable for this
  *           stuff.
  *
@@ -28,5 +28,11 @@
 
 #define atomic_inc(v) ((void)__atomic_add(1, v))
 #define atomic_dec(v) ((void)__atomic_sub(1, v))
+
+/* Atomic operations are already serializing */
+#define smp_mb__before_atomic_dec()	barrier()
+#define smp_mb__after_atomic_dec()	barrier()
+#define smp_mb__before_atomic_inc()	barrier()
+#define smp_mb__after_atomic_inc()	barrier()
 
 #endif /* !(__ARCH_SPARC64_ATOMIC__) */