From 99e22598e9a8e0a996d69c8c0f6b7027cb57720a Mon Sep 17 00:00:00 2001
From: Jens Axboe <jaxboe@fusionio.com>
Date: Mon, 18 Apr 2011 09:59:55 +0200
Subject: [PATCH] block: drop queue lock before calling __blk_run_queue() for
 kblockd punt

If we know we are going to punt to kblockd, we can drop the queue
lock before calling into __blk_run_queue() since it only does a
safe bit test and a workqueue call. Since kblockd needs to grab
this very lock as one of the first things it does, it's a good
optimization to drop the lock before waking kblockd.

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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