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x86: fix IO write barrier
authorNick Piggin <npiggin@suse.de>
Sat, 13 Oct 2007 01:06:55 +0000 (03:06 +0200)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Sat, 13 Oct 2007 01:41:21 +0000 (18:41 -0700)
wmb() on x86 must always include a barrier, because stores can go out of
order in many cases when dealing with devices (eg. WC memory).

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

No differences found
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