bcache: add mutex lock for bch_is_open
authorJianjian Huo <samuel.huo@gmail.com>
Sun, 13 Jul 2014 16:08:59 +0000 (09:08 -0700)
committerKent Overstreet <kmo@daterainc.com>
Mon, 4 Aug 2014 22:23:04 +0000 (15:23 -0700)
Since bch_is_open will iterate linked list bch_cache_sets and
uncached_devices, it needs bch_register_lock.

Signed-off-by: Jianjian Huo <samuel.huo@gmail.com>

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