[PATCH] ppc64: use smp_mb and smp_wmb
Use smp_mb and smp_wmb. In particular smp_wmb is lighter weight than wmb. Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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