This is a note to let you know that I've just added the patch titled
bcache: check return value of register_shrinker
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: bcache-check-return-value-of-register_shrinker.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Thu Feb 1 14:00:34 CET 2018
From: Michael Lyle mlyle@lyle.org Date: Fri, 24 Nov 2017 15:14:27 -0800 Subject: bcache: check return value of register_shrinker
From: Michael Lyle mlyle@lyle.org
[ Upstream commit 6c4ca1e36cdc1a0a7a84797804b87920ccbebf51 ]
register_shrinker is now __must_check, so check it to kill a warning. Caller of bch_btree_cache_alloc in super.c appropriately checks return value so this is fully plumbed through.
This V2 fixes checkpatch warnings and improves the commit description, as I was too hasty getting the previous version out.
Signed-off-by: Michael Lyle mlyle@lyle.org Reviewed-by: Vojtech Pavlik vojtech@suse.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/md/bcache/btree.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/md/bcache/btree.c +++ b/drivers/md/bcache/btree.c @@ -803,7 +803,10 @@ int bch_btree_cache_alloc(struct cache_s c->shrink.scan_objects = bch_mca_scan; c->shrink.seeks = 4; c->shrink.batch = c->btree_pages * 2; - register_shrinker(&c->shrink); + + if (register_shrinker(&c->shrink)) + pr_warn("bcache: %s: could not register shrinker", + __func__);
return 0; }
Patches currently in stable-queue which might be from mlyle@lyle.org are
queue-4.9/bcache-check-return-value-of-register_shrinker.patch