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Commit 599bf77a authored by Max Filippov's avatar Max Filippov Committed by Chris Zankel
Browse files

xtensa: fix mb and wmb definitions 



Define mb and wmb as memw to force memory barrier.

Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
Signed-off-by: default avatarChris Zankel <chris@zankel.net>
parent 71872b5f

arch/xtensa/include/asm/barrier.h

+3 −3
Original line number Diff line number Diff line
@@ -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