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bcache: check return value of register_shrinker 

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>
This commit is contained in:
Michael Lyle 2017-11-24 15:14:27 -08:00 committed by Jens Axboe
parent e393aa2446
commit 6c4ca1e36c
1 changed files with 4 additions and 1 deletions
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5
drivers/md/bcache/btree.c
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@ -807,7 +807,10 @@ int bch_btree_cache_alloc(struct cache_set *c)
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;
}