From 599bf77a0d0b253dd94fd058275b05520c6d25db Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Sat, 24 Nov 2012 06:22:08 +0400 Subject: xtensa: fix mb and wmb definitions Define mb and wmb as memw to force memory barrier. Signed-off-by: Max Filippov Signed-off-by: Chris Zankel --- arch/xtensa/include/asm/barrier.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/xtensa/include/asm/barrier.h') diff --git a/arch/xtensa/include/asm/barrier.h b/arch/xtensa/include/asm/barrier.h index 55707a8009d3..ef021677d536 100644 --- a/arch/xtensa/include/asm/barrier.h +++ b/arch/xtensa/include/asm/barrier.h @@ -3,7 +3,7 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. * - * Copyright (C) 2001 - 2005 Tensilica Inc. + * Copyright (C) 2001 - 2012 Tensilica Inc. */ #ifndef _XTENSA_SYSTEM_H @@ -12,8 +12,8 @@ #define smp_read_barrier_depends() do { } while(0) #define read_barrier_depends() do { } while(0) -#define mb() barrier() -#define rmb() mb() +#define mb() ({ __asm__ __volatile__("memw" : : : "memory"); }) +#define rmb() barrier() #define wmb() mb() #ifdef CONFIG_SMP -- cgit v1.2.3