From: Michael S. Tsirkin Date: Sun, 27 Dec 2015 13:04:42 +0000 (+0200) Subject: sh: define __smp_xxx, fix smp_store_mb for !SMP X-Git-Tag: v4.5-rc1~62^2~21 X-Git-Url: http://git.cascardo.eti.br/?p=cascardo%2Flinux.git;a=commitdiff_plain;h=90a3ccb0be538a914e6a5c51ae919762261563ad sh: define __smp_xxx, fix smp_store_mb for !SMP sh variant of smp_store_mb() calls xchg() on !SMP which is stronger than implied by both the name and the documentation. define __smp_store_mb instead: code in asm-generic/barrier.h will then define smp_store_mb correctly depending on CONFIG_SMP. Signed-off-by: Michael S. Tsirkin Acked-by: Arnd Bergmann Acked-by: Peter Zijlstra (Intel) --- diff --git a/arch/sh/include/asm/barrier.h b/arch/sh/include/asm/barrier.h index bf91037db4e0..f887c6465a82 100644 --- a/arch/sh/include/asm/barrier.h +++ b/arch/sh/include/asm/barrier.h @@ -32,7 +32,8 @@ #define ctrl_barrier() __asm__ __volatile__ ("nop;nop;nop;nop;nop;nop;nop;nop") #endif -#define smp_store_mb(var, value) do { (void)xchg(&var, value); } while (0) +#define __smp_store_mb(var, value) do { (void)xchg(&var, value); } while (0) +#define smp_store_mb(var, value) __smp_store_mb(var, value) #include