From 2ac6608c41f8c45371ea9dddae7f99bc2c15d5cf Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@g5.osdl.org>
Date: Thu, 28 Jul 2005 10:34:47 -0700
Subject: [PATCH] Revert broken "statement with no effect" warning fix

It may shut up gcc, but it also incorrectly changes the semantics of the
smp_call_function() helpers.

You can fix the warning other ways if you are interested (create another
inline function that takes no arguments and returns zero), but
preferably gcc just shouldn't complain about unused return values from
statement expressions in the first place.
---
 include/asm-alpha/smp.h |  9 ++-------
 include/linux/smp.h     | 20 ++++----------------
 2 files changed, 6 insertions(+), 23 deletions(-)

diff --git a/include/asm-alpha/smp.h b/include/asm-alpha/smp.h
index a3d09d14fe..9950706abd 100644
--- a/include/asm-alpha/smp.h
+++ b/include/asm-alpha/smp.h
@@ -50,16 +50,11 @@ extern cpumask_t cpu_online_map;
 extern int smp_num_cpus;
 #define cpu_possible_map	cpu_present_mask
 
-int smp_call_function_on_cpu(void (*) (void *), void *, int, int, cpumask_t);
+int smp_call_function_on_cpu(void (*func) (void *info), void *info,int retry, int wait, cpumask_t cpu);
 
 #else /* CONFIG_SMP */
 
-static inline int
-smp_call_function_on_cpu (void (*func) (void *), void *info, int retry,
-			  int wait, cpumask_t cpu)
-{
-	return 0;
-}
+#define smp_call_function_on_cpu(func,info,retry,wait,cpu)    ({ 0; })
 
 #endif /* CONFIG_SMP */
 
diff --git a/include/linux/smp.h b/include/linux/smp.h
index 22b451d1b9..9dfa3ee769 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -94,23 +94,11 @@ void smp_prepare_boot_cpu(void);
  */
 #define raw_smp_processor_id()			0
 #define hard_smp_processor_id()			0
-#define num_booting_cpus()			1
-
-static inline int smp_call_function(void (*func) (void *), void *info,
-				    int retry, int wait)
-{
-	return 0;
-}
-
-static inline int on_each_cpu(void (*func) (void *), void *info,
-			      int retry, int wait)
-{
-	func(info);
-	return 0;
-}
-
+#define smp_call_function(func,info,retry,wait)	({ 0; })
+#define on_each_cpu(func,info,retry,wait)	({ func(info); 0; })
 static inline void smp_send_reschedule(int cpu) { }
-static inline void smp_prepare_boot_cpu(void) { }
+#define num_booting_cpus()			1
+#define smp_prepare_boot_cpu()			do {} while (0)
 
 #endif /* !SMP */
 
-- 
2.39.5