summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorAlex Elder <elder@dreamhost.com>2012-01-11 19:42:15 -0800
committerSage Weil <sage@newdream.net>2012-01-12 11:00:50 -0800
commit0e805a1d857799352e51e8697c0b1a30aec16913 (patch)
treebc6ad83e25af597f40b03170026c3e5d331c2814
parenta40dc6cc2e121abcbd1b22583ef5447763df510c (diff)
rbd: initialize snap_rwsem in rbd_add()
New rbd device structures get initialized in rbd_add(). Many of the fields rely on being initially zero-filled. However we lockdep was noticing that the rw_semaphore embedded in the header field was not getting properly initialized. Fix that. Signed-off-by: Alex Elder <elder@dreamhost.com> Signed-off-by: Sage Weil <sage@newdream.net>
-rw-r--r--drivers/block/rbd.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 148ab944378..3fd31dec8c9 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -2184,6 +2184,8 @@ static ssize_t rbd_add(struct bus_type *bus,
INIT_LIST_HEAD(&rbd_dev->node);
INIT_LIST_HEAD(&rbd_dev->snaps);
+ init_rwsem(&rbd_dev->header.snap_rwsem);
+
/* generate unique id: find highest unique id, add one */
mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING);