This is a note to let you know that I've just added the patch titled
genhd: fix leftover might_sleep() in blk_free_devt()
to the 3.16-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
genhd-fix-leftover-might_sleep-in-blk_free_devt.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 46f341ffcfb5d8530f7d1e60f3be06cce6661b62 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@xxxxxx>
Date: Tue, 16 Sep 2014 13:38:51 -0600
Subject: genhd: fix leftover might_sleep() in blk_free_devt()
From: Jens Axboe <axboe@xxxxxx>
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@xxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
block/genhd.c | 2 --
1 file changed, 2 deletions(-)
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -445,8 +445,6 @@ int blk_alloc_devt(struct hd_struct *par
*/
void blk_free_devt(dev_t devt)
{
- might_sleep();
-
if (devt == MKDEV(0, 0))
return;
Patches currently in stable-queue which might be from axboe@xxxxxx are
queue-3.16/genhd-fix-leftover-might_sleep-in-blk_free_devt.patch
queue-3.16/block-fix-dev_t-minor-allocation-lifetime.patch
queue-3.16/cfq-iosched-fix-wrong-children_weight-calculation.patch
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