From: Takashi Iwai Fix gcc4.1 compile warnings "value computed is not used" with set_current_state() and set_task_state() on i386/SMP and x86-64. Signed-off-by: Takashi Iwai Cc: Nick Piggin Cc: Andi Kleen Signed-off-by: Andrew Morton --- include/asm-i386/system.h | 2 +- include/asm-x86_64/system.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff -puN include/asm-i386/system.h~fix-value-computed-is-not-used-compile-warnings-with-gcc-41 include/asm-i386/system.h --- devel/include/asm-i386/system.h~fix-value-computed-is-not-used-compile-warnings-with-gcc-41 2006-01-23 15:40:20.000000000 -0800 +++ devel-akpm/include/asm-i386/system.h 2006-01-23 15:40:20.000000000 -0800 @@ -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() diff -puN include/asm-x86_64/system.h~fix-value-computed-is-not-used-compile-warnings-with-gcc-41 include/asm-x86_64/system.h --- devel/include/asm-x86_64/system.h~fix-value-computed-is-not-used-compile-warnings-with-gcc-41 2006-01-23 15:40:20.000000000 -0800 +++ devel-akpm/include/asm-x86_64/system.h 2006-01-23 15:40:20.000000000 -0800 @@ -327,7 +327,7 @@ static inline unsigned long __cmpxchg(vo #define wmb() asm volatile("" ::: "memory") #endif #define read_barrier_depends() do {} while(0) -#define set_mb(var, value) do { xchg(&var, value); } while (0) +#define set_mb(var, value) do { (void) xchg(&var, value); } while (0) #define set_wmb(var, value) do { var = value; wmb(); } while (0) #define warn_if_not_ulong(x) do { unsigned long foo; (void) (&(x) == &foo); } while (0) _