Patch "bcache: check return value of register_shrinker" has been added to the 4.14-stable tree

Patch "bcache: check return value of register_shrinker" has been added to the 4.14-stable tree

[gregkh]

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 4.14-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:
     bcache-check-return-value-of-register_shrinker.patch
and it can be found in the queue-4.14 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 13:45:42 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@verizon.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
@@ -807,7 +807,10 @@ 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-4.14/bcache-check-return-value-of-register_shrinker.patch