cfq-iosched: Get rid of nr_groups

o Currently code does not seem to be using cfqd->nr_groups. Get rid of it.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Reviewed-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 0 insertions, 4 deletions

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index a0e5347767d9..d9bfa09e68c1 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -208,8 +208,6 @@ struct cfq_data {
         /* Root service tree for cfq_groups */
         struct cfq_rb_root grp_service_tree;
         struct cfq_group root_group;
-        /* Number of active cfq groups on group service tree */
-        int nr_groups;
 
         /*
          * The priority currently being served
@@ -842,7 +840,6 @@ cfq_group_service_tree_add(struct cfq_data *cfqd, struct cfq_group *cfqg)
 
         __cfq_group_service_tree_add(st, cfqg);
         cfqg->on_st = true;
-        cfqd->nr_groups++;
         st->total_weight += cfqg->weight;
 }
 
@@ -863,7 +860,6 @@ cfq_group_service_tree_del(struct cfq_data *cfqd, struct cfq_group *cfqg)
 
         cfq_log_cfqg(cfqd, cfqg, "del_from_rr group");
         cfqg->on_st = false;
-        cfqd->nr_groups--;
         st->total_weight -= cfqg->weight;
         if (!RB_EMPTY_NODE(&cfqg->rb_node))
                 cfq_rb_erase(&cfqg->rb_node, st);