From bfd343aa1718457d34b99ce6573085ac340da288 Mon Sep 17 00:00:00 2001
From: Keith Busch <keith.busch@intel.com>
Date: Wed, 11 Mar 2015 23:56:39 -0400
Subject: [PATCH] blk-mq: don't wait in blk_mq_queue_enter() if __GFP_WAIT
 isn't set

Return -EBUSY if we're unable to enter a queue immediately when
allocating a blk-mq request without __GFP_WAIT.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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