[PATCH] cleanup smp_call_function UP build

net/core/flow.c: In function 'flow_cache_flush':
net/core/flow.c:299: warning: statement with no effect
Signed-off-by: Con Kolivas <kernel@kolivas.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/smp.h

@@ -82,7 +82,11 @@ void smp_prepare_boot_cpu(void);
  */
 #define raw_smp_processor_id()			0
 #define hard_smp_processor_id()			0
-#define smp_call_function(func,info,retry,wait)	({ 0; })
+static inline int up_smp_call_function(void)
+{
+	return 0;
+}
+#define smp_call_function(func,info,retry,wait)	(up_smp_call_function())
 #define on_each_cpu(func,info,retry,wait)	\
 	({					\
 		local_irq_disable();		\