md/bitmap: reduce dependence on sysfs.
authorNeilBrown <neilb@suse.de>
Tue, 1 Jun 2010 09:37:32 +0000 (19:37 +1000)
committerNeilBrown <neilb@suse.de>
Mon, 26 Jul 2010 03:21:31 +0000 (13:21 +1000)
For dm-raid45 we will want to use bitmaps in dm-targets which don't
have entries in sysfs, so cope with the mddev not living in sysfs.

Signed-off-by: NeilBrown <neilb@suse.de>

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