From 49632ebf69e4e24ae24d2a524e91b0cc5e8d5b0e Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Mon, 17 Mar 2014 14:53:27 +0000 Subject: [PATCH] xen: arm: Use dmb for smp barriers The full power of dsb is not required in this context. Also change wmb() to be dsb() directly instead of indirectly via mb(), for clarity. Signed-off-by: Ian Campbell Acked-by: Stefano Stabellini Acked-by: Tim Deegan --- xen/include/asm-arm/system.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/xen/include/asm-arm/system.h b/xen/include/asm-arm/system.h index e003624939..89c61efd7a 100644 --- a/xen/include/asm-arm/system.h +++ b/xen/include/asm-arm/system.h @@ -18,11 +18,11 @@ #define mb() dsb() #define rmb() dsb() -#define wmb() mb() +#define wmb() dsb() -#define smp_mb() mb() -#define smp_rmb() rmb() -#define smp_wmb() wmb() +#define smp_mb() dmb() +#define smp_rmb() dmb() +#define smp_wmb() dmb() #define xchg(ptr,x) \ ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) -- 2.30.2