blkio: Initialize blkg->stats_lock for the root cfqg too

This fixes the lockdep warning reported by Gui Jianfeng.

Signed-off-by: Divyesh Shah <dpshah@google.com>
Reviewed-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 01771098355d..62defd05518f 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -961,7 +961,6 @@ cfq_find_alloc_cfqg(struct cfq_data *cfqd, struct cgroup *cgroup, int create)
         for_each_cfqg_st(cfqg, i, j, st)
                 *st = CFQ_RB_ROOT;
         RB_CLEAR_NODE(&cfqg->rb_node);
-        blkio_group_init(&cfqg->blkg);
 
         /*
          * Take the initial reference that will be released on destroy