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s390/barrier: convert mb() to define again 

Some of the now available common code drivers only compile if mb() is a define.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2013-01-30 13:56:14 +01:00 committed by Martin Schwidefsky
parent 1aae0560d1
commit e06ef37283
1 changed files with 3 additions and 6 deletions
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9
arch/s390/include/asm/barrier.h
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@ -13,15 +13,12 @@
* to devices.
*/
static inline void mb(void)
{
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
/* Fast-BCR without checkpoint synchronization */
asm volatile("bcr 14,0" : : : "memory");
/* Fast-BCR without checkpoint synchronization */
#define mb() do { asm volatile("bcr 14,0" : : : "memory"); } while (0)
#else
asm volatile("bcr 15,0" : : : "memory");
#define mb() do { asm volatile("bcr 15,0" : : : "memory"); } while (0)
#endif
}
#define rmb() mb()
#define wmb() mb()