From 46f341ffcfb5d8530f7d1e60f3be06cce6661b62 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@fb.com>
Date: Tue, 16 Sep 2014 13:38:51 -0600
Subject: [PATCH] genhd: fix leftover might_sleep() in blk_free_devt()

Commit 2da78092 changed the locking from a mutex to a spinlock,
so we now longer sleep in this context. But there was a leftover
might_sleep() in there, which now triggers since we do the final
free from an RCU callback. Get rid of it.

Reported-by: Pontus Fuchs <pontus.fuchs@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---
 block/genhd.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index 09da5e4a8e03..e6723bd4d7a1 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -445,8 +445,6 @@ int blk_alloc_devt(struct hd_struct *part, dev_t *devt)
  */
 void blk_free_devt(dev_t devt)
 {
-	might_sleep();
-
 	if (devt == MKDEV(0, 0))
 		return;