From: Jens Axboe <axboe@fb.com>
Date: Wed, 16 Apr 2014 16:38:35 +0000 (-0600)
Subject: blk-mq: kill preempt disable/enable in blk_mq_work_fn()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6700a678c02e47b6d50c51da2a46ff80efedb8c7;p=linux-beck.git

blk-mq: kill preempt disable/enable in blk_mq_work_fn()

blk_mq_work_fn() is always invoked off the bounded workqueues,
so it can happily preempt among the queues in that set without
causing any issues for blk-mq.

Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 1fa01ff0f9bc..b59a8d027dff 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -714,9 +714,7 @@ static void blk_mq_work_fn(struct work_struct *work)
 
 	hctx = container_of(work, struct blk_mq_hw_ctx, delayed_work.work);
 
-	preempt_disable();
 	__blk_mq_run_hw_queue(hctx);
-	preempt_enable();
 }
 
 static void __blk_mq_insert_request(struct blk_mq_hw_ctx *hctx,