xen/blkfront: map REQ_FLUSH into a full barrier
authorJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Mon, 1 Nov 2010 18:32:27 +0000 (14:32 -0400)
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Tue, 2 Nov 2010 14:43:51 +0000 (10:43 -0400)
Implement a flush as a full barrier, since we have nothing weaker.

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

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