From 4ecd4fef3a074c8bb43c391a57742c422469ebbd Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Thu, 7 May 2015 09:38:13 +0200
Subject: [PATCH] block: use an atomic_t for mq_freeze_depth

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>
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