[PATCH] Fix "value computed is not used" compile warnings with gcc-4.1

[Takashi Iwai <tiwai@suse.de>]

[PATCH] Fix "value computed is not used" compile warnings with gcc-4.1

The patch fixes gcc4.1 compile warnings "value computed is not used"
with set_current_state() and set_task_state() on i386/SMP.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
diff --git a/include/asm-i386/system.h b/include/asm-i386/system.h
--- a/include/asm-i386/system.h
+++ b/include/asm-i386/system.h
@@ -507,7 +507,7 @@ struct alt_instr { 
 #define smp_rmb()	rmb()
 #define smp_wmb()	wmb()
 #define smp_read_barrier_depends()	read_barrier_depends()
-#define set_mb(var, value) do { xchg(&var, value); } while (0)
+#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
 #else
 #define smp_mb()	barrier()
 #define smp_rmb()	barrier()
-
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