From 598056d5af8fef1dbe8f96f5c2b641a528184e5a Mon Sep 17 00:00:00 2001
From: Nick Piggin <npiggin@suse.de>
Date: Thu, 22 May 2008 00:10:56 +1000
Subject: [PATCH] [POWERPC] Fix rmb to order cacheable vs. noncacheable

lwsync is explicitly defined not to have any effect on the ordering of
accesses to device memory, so it cannot be used for rmb(). sync appears
to be the only barrier which fits the bill.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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