From: Daniel Stodden <daniel.stodden@citrix.com>
Date: Fri, 30 Apr 2010 22:01:22 +0000 (+0000)
Subject: blkfront: Lock blockfront_info during xbdev removal
X-Git-Tag: v2.6.36-rc1~288^2~68
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fa1bd3591a669b92b635dbdb11d1a32a5630821b;p=pandora-kernel.git

blkfront: Lock blockfront_info during xbdev removal

Same approach as blkfront_closing:
 * Grab the bdev safely, holding the info mutex.
 * Zap xbdev safely, holding the info mutex.
 * Try bdev removal safely, holding bd_mutex.

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
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