diff options
Diffstat (limited to 'include/asm-x86/system_32.h')
| -rw-r--r-- | include/asm-x86/system_32.h | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/include/asm-x86/system_32.h b/include/asm-x86/system_32.h index d69ba937e092..8b15bd3057c9 100644 --- a/include/asm-x86/system_32.h +++ b/include/asm-x86/system_32.h @@ -216,6 +216,7 @@ static inline unsigned long get_limit(unsigned long segment) #define mb() alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2) #define rmb() alternative("lock; addl $0,0(%%esp)", "lfence", X86_FEATURE_XMM2) +#define wmb() alternative("lock; addl $0,0(%%esp)", "sfence", X86_FEATURE_XMM) /** * read_barrier_depends - Flush all pending reads that subsequents reads @@ -271,18 +272,14 @@ static inline unsigned long get_limit(unsigned long segment) #define read_barrier_depends() do { } while(0) -#ifdef CONFIG_X86_OOSTORE -/* Actually there are no OOO store capable CPUs for now that do SSE, - but make it already an possibility. */ -#define wmb() alternative("lock; addl $0,0(%%esp)", "sfence", X86_FEATURE_XMM) -#else -#define wmb() __asm__ __volatile__ ("": : :"memory") -#endif - #ifdef CONFIG_SMP #define smp_mb() mb() #define smp_rmb() rmb() -#define smp_wmb() wmb() +#ifdef CONFIG_X86_OOSTORE +# define smp_wmb() wmb() +#else +# define smp_wmb() barrier() +#endif #define smp_read_barrier_depends() read_barrier_depends() #define set_mb(var, value) do { (void) xchg(&var, value); } while (0) #else |