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block: use an atomic_t for mq_freeze_depth

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lockdep gets unhappy about the not disabling irqs when using the queue_lock
around it.  Instead of trying to fix that up just switch to an atomic_t
and get rid of the lock.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig
2015-05-07 09:38:13 +02:00
committed by Jens Axboe
parent 5b3f341f09
commit 4ecd4fef3a
2 changed files with 11 additions and 15 deletions
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include/linux/blkdev.h
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@@ -444,7 +444,7 @@ struct request_queue {
struct mutex sysfs_lock;
int bypass_depth;
int mq_freeze_depth;
atomic_t mq_freeze_depth;
#if defined(CONFIG_BLK_DEV_BSG)
bsg_job_fn *bsg_job_fn;