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arch,blackfin: Convert smp_mb__*()

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Blackfin's atomic primitives do not imply a full barrier as whitnessed
from its SMP smp_mb__{before,after}_clear_bit() implementations.

However since !SMP smp_mb() reduces to barrier() remove everything and
rely on the asm-generic/barrier.h implentation.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/n/tip-1widdkdsb3c1titq8jez6g3g@git.kernel.org
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Steven Miao <realmz6@gmail.com>
Cc: adi-buildroot-devel@lists.sourceforge.net
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra
2014-03-13 19:00:37 +01:00
committed by Ingo Molnar
parent 710adaa913
commit b7bb7d9b28
2 changed files with 5 additions and 12 deletions
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3
arch/blackfin/include/asm/barrier.h
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@@ -27,6 +27,9 @@
#endif /* !CONFIG_SMP */
#define smp_mb__before_atomic() barrier()
#define smp_mb__after_atomic() barrier()
#include <asm-generic/barrier.h>
#endif /* _BLACKFIN_BARRIER_H */