| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 29/67] bcache: check return value of register_shrinker | Date | Fri, 2 Feb 2018 17:57:58 +0100 |
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4.4-stable review patch. If anyone has any objections, please let me know.
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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 @@ -808,7 +808,10 @@ 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; }
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