tree b8582d42e6f2a0fdcb0fe40ee319c90efc8664a8
parent 15dfdddbf0c2be680d5d2fe2bbe3aad3dba3cf0e
author Paul Mundt <lethal@linux-sh.org> 1255847762 +0900
committer Paul Mundt <lethal@linux-sh.org> 1255847762 +0900

sh: Fix up smp_mb__xxx() memory barriers for SH-4A SMP.

In the past these were simply wrapping to barrier() which was sufficient
on SH SMP platforms predating SH-4A. Unfortunately due to ll/sc semantics
an explicit synco is needed in these cases, which is sorted for us by
just switching these over to smp_mb(). smp_mb() also has the benefit of
being wrapped to barrier() in the UP and non-SH4A cases, so old behaviour
is maintained for those parts.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>