From cb96a42cc1f50ba1c7b1e9b2343bec80b926107f Mon Sep 17 00:00:00 2001
From: Ming Lei <tom.leiming@gmail.com>
Date: Sun, 1 Jun 2014 00:43:37 +0800
Subject: [PATCH] blk-mq: fix schedule from atomic context

blk_mq_put_ctx() has to be called before io_schedule() in
bt_get().

This patch fixes the problem by taking similar approach from
percpu_ida allocation for the situation.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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