[PKT_SCHED] sch_htb: use rb_first() cleanup

Use rb_first() to get first entry in rb tree.

Signed-off-by: Akinbou Mita <akinobu.mita@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 3 deletions

diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index bb3ddd4784b1..9b9c555c713f 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -786,11 +786,10 @@ static long htb_do_events(struct htb_sched *q, int level)
         for (i = 0; i < 500; i++) {
                 struct htb_class *cl;
                 long diff;
-                struct rb_node *p = q->wait_pq[level].rb_node;
+                struct rb_node *p = rb_first(&q->wait_pq[level]);
+
                 if (!p)
                         return 0;
-                while (p->rb_left)
-                        p = p->rb_left;
 
                 cl = rb_entry(p, struct htb_class, pq_node);
                 if (time_after(cl->pq_key, q->jiffies)) {