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authorNeil Brown <neilb@suse.de>2008-05-14 16:05:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-05-14 19:11:15 -0700
commite7e72bf641b1fc7b9df6f40bd2c36dfccd8d647c (patch)
tree81b1db5434c9635bf23fb40415056e10390cd692 /drivers/md/multipath.c
parent4920916f728fe3c51f54c25ab7b3d271254aab5a (diff)
Remove blkdev warning triggered by using md
As setting and clearing queue flags now requires that we hold a spinlock on the queue, and as blk_queue_stack_limits is called without that lock, get the lock inside blk_queue_stack_limits. For blk_queue_stack_limits to be able to find the right lock, each md personality needs to set q->queue_lock to point to the appropriate lock. Those personalities which didn't previously use a spin_lock, us q->__queue_lock. So always initialise that lock when allocated. With this in place, setting/clearing of the QUEUE_FLAG_PLUGGED bit will no longer cause warnings as it will be clear that the proper lock is held. Thanks to Dan Williams for review and fixing the silly bugs. Signed-off-by: NeilBrown <neilb@suse.de> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Alistair John Strachan <alistair@devzero.co.uk> Cc: Nick Piggin <npiggin@suse.de> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Jacek Luczak <difrost.kernel@gmail.com> Cc: Prakash Punnoor <prakash@punnoor.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/md/multipath.c')
-rw-r--r--drivers/md/multipath.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 42ee1a2dc14..4f4d1f38384 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -417,6 +417,7 @@ static int multipath_run (mddev_t *mddev)
* bookkeeping area. [whatever we allocate in multipath_run(),
* should be freed in multipath_stop()]
*/
+ mddev->queue->queue_lock = &mddev->queue->__queue_lock;
conf = kzalloc(sizeof(multipath_conf_t), GFP_KERNEL);
mddev->private = conf;