[PATCH] bcache: remove unnecessary null poiner check in cache_set_free

[zhong jiang]

The iterator in for_each_cache is never null, therefore, remove
the redundant null pointer check.

Signed-off-by: zhong jiang <zhongji...@huawei.com>
---
 drivers/md/bcache/super.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 94c756c..2d26f9e 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1513,12 +1513,11 @@ static void cache_set_free(struct closure *cl)
        bch_btree_cache_free(c);
        bch_journal_free(c);
 
-       for_each_cache(ca, c, i)
-               if (ca) {
-                       ca->set = NULL;
-                       c->cache[ca->sb.nr_this_dev] = NULL;
-                       kobject_put(&ca->kobj);
-               }
+       for_each_cache(ca, c, i) {
+               ca->set = NULL;
+               c->cache[ca->sb.nr_this_dev] = NULL;
+               kobject_put(&ca->kobj);
+       }
 
        bch_bset_sort_state_free(&c->sort);
        free_pages((unsigned long) c->uuids, ilog2(bucket_pages(c)));
-- 
1.7.12.4