From: Kent Overstreet <kmo@daterainc.com>
Date: Tue, 10 Dec 2013 21:24:26 +0000 (-0800)
Subject: bcache: Minor btree cache fix
X-Git-Tag: next-20140109~46^2~1^2~30
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b0f32a56f27eb0df4124dbfc8eb6f09f423eed99;p=karo-tx-linux.git

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 946ecd3b048b..aaa87b3be9ef 100644
--- 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);