[PATCH] device-mapper: let freeze_bdev return error
Allow freeze_bdev() to return an error. Signed-Off-By: NAlasdair G Kergon <agk@redhat.com> From: Christoph Hellwig <hch@lst.de> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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