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s390: use generic memory barriers

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The s390 kernel is SMP to 99.99%, we just didn't bother with a
non-smp variant for the memory-barriers. If the generic header
is used we'd get the non-smp version for free. It will save a
small amount of text space for CONFIG_SMP=n.

Suggested-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
This commit is contained in:
Michael S. Tsirkin 2016-01-06 09:13:14 +02:00
parent 234927540e
commit a677f48695
1 changed files with 0 additions and 3 deletions
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3
arch/s390/include/asm/barrier.h
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@ -29,9 +29,6 @@
#define __smp_mb() mb()
#define __smp_rmb() rmb()
#define __smp_wmb() wmb()
#define smp_mb() __smp_mb()
#define smp_rmb() __smp_rmb()
#define smp_wmb() __smp_wmb()
#define __smp_store_release(p, v) \
do { \