[PATCH] dm/md dependency tree in sysfs: convert bd_sem to bd_mutex
Convert bd_sem to bd_mutex Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Cc: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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