From: Kent Overstreet <kmo@daterainc.com>
Date: Thu, 11 Jul 2013 04:25:02 +0000 (-0700)
Subject: bcache: Fix a sysfs splat on shutdown
X-Git-Tag: v3.11-rc3~32^2^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c9502ea4424b31728703d113fc6b30bfead14633;p=pandora-kernel.git

bcache: Fix a sysfs splat on shutdown

If we stopped a bcache device when we were already detaching (or
something like that), bcache_device_unlink() would try to remove a
symlink from sysfs that was already gone because the bcache dev kobject
had already been removed from sysfs.

So keep track of whether we've removed stuff from sysfs.

Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: linux-stable <stable@vger.kernel.org> # >= v3.10
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