From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Date: Tue, 2 Nov 2010 14:38:33 +0000 (-0400)
Subject: xen/blkfront: Implement FUA with BLKIF_OP_WRITE_BARRIER
X-Git-Tag: v2.6.37-rc4~22^2~4^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=be2f8373c188ed1f5d36003c9928e4d695213080;p=pandora-kernel.git

xen/blkfront: Implement FUA with BLKIF_OP_WRITE_BARRIER

The BLKIF_OP_WRITE_BARRIER is a full ordered barrier, so we can use it
to implement FUA as well as a plain FLUSH.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Christoph Hellwig <hch@lst.de>
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