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sh: define __smp_xxx, 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. define __smp_store_mb instead: code in asm-generic/barrier.h will then define smp_store_mb correctly depending on CONFIG_SMP. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
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@ -32,7 +32,8 @@
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#define ctrl_barrier() __asm__ __volatile__ ("nop;nop;nop;nop;nop;nop;nop;nop")
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#endif
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#define smp_store_mb(var, value) do { (void)xchg(&var, value); } while (0)
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#define __smp_store_mb(var, value) do { (void)xchg(&var, value); } while (0)
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#define smp_store_mb(var, value) __smp_store_mb(var, value)
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#include <asm-generic/barrier.h>
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