bcache: Minor btree cache fix

Signed-off-by: Kent Overstreet <kmo@daterainc.com>

diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 946ecd3..aaa87b3 100644 (file)
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -714,14 +714,10 @@ static unsigned long bch_mca_scan(struct shrinker *shrink,
                }
        }
 
-       /*
-        * Can happen right when we first start up, before we've read in any
-        * btree nodes
-        */
-       if (list_empty(&c->btree_cache))
-               goto out;
-
        for (i = 0; (nr--) && i < c->bucket_cache_used; i++) {
+               if (list_empty(&c->btree_cache))
+                       goto out;
+
                b = list_first_entry(&c->btree_cache, struct btree, list);
                list_rotate_left(&c->btree_cache);