genhd: fix leftover might_sleep() in blk_free_devt()

commit 46f341ffcfb5d8530f7d1e60f3be06cce6661b62 upstream.

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>
Signed-off-by: Zefan Li <lizefan@huawei.com>

diff --git a/block/genhd.c b/block/genhd.c
index 54867f43ad9f65a0f1cc6f709f5fc359aaf6bbfb..60f7e6ce76b402842ba4a677b90ad773cfabe77c 100644 (file)
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -447,8 +447,6 @@ 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;