From e7e72bf641b1fc7b9df6f40bd2c36dfccd8d647c Mon Sep 17 00:00:00 2001 From: Neil Brown Date: Wed, 14 May 2008 16:05:54 -0700 Subject: 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 Cc: Dan Williams Cc: Jens Axboe Cc: Alistair John Strachan Cc: Nick Piggin Cc: "Rafael J. Wysocki" Cc: Jacek Luczak Cc: Prakash Punnoor Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/multipath.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/md/multipath.c') diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c index 42ee1a2..4f4d1f3 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; -- cgit v1.1