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| author | Max Filippov <jcmvbkbc@gmail.com> | 2012-11-24 06:22:08 +0400 |
|---|---|---|
| committer | Chris Zankel <chris@zankel.net> | 2012-12-19 09:10:23 +0400 |
| commit | 599bf77a0d0b253dd94fd058275b05520c6d25db (patch) | |
| tree | 4b6a0ae21bf0188adbe2a0f25ad2ac81a7d53af1 | |
| parent | 71872b5fb2bed294fd5afd900890880e9faa82c1 (diff) | |
| download | linux-599bf77a0d0b253dd94fd058275b05520c6d25db.tar.xz | |
xtensa: fix mb and wmb definitions
Define mb and wmb as memw to force memory barrier.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
| -rw-r--r-- | arch/xtensa/include/asm/barrier.h | 6 |
1 files changed, 3 insertions, 3 deletions
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 |