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sh: fix smp_store_mb for !SMP 

sh variant of smp_store_mb() calls xchg() on !SMP which is stronger than
implied by both the name and the documentation.

commit 90a3ccb0be ("sh: define __smp_xxx,
fix smp_store_mb for !SMP") was supposed to fix it but
left the bug in place.

Drop smp_store_mb, so that code in asm-generic/barrier.h
will define it correctly depending on CONFIG_SMP.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
hifive-unleashed-5.1
Michael S. Tsirkin 2015-12-27 15:04:42 +02:00
parent a7c490333d
commit fb9b050ce9
1 changed files with 0 additions and 1 deletions
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arch/sh/include/asm/barrier.h
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@ -33,7 +33,6 @@
#endif
#define __smp_store_mb(var, value) do { (void)xchg(&var, value); } while (0)
#define smp_store_mb(var, value) __smp_store_mb(var, value)
#include <asm-generic/barrier.h>