net_sched: use setup_deferrable_timer

Use setup_deferrable_timer() instead of init_timer_deferrable() to
simplify the code.
Signed-off-by: NGeliang Tang <geliangtang@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sched/cls_flow.c

@@ -508,9 +508,8 @@ static int flow_change(struct net *net, struct sk_buff *in_skb,
 		get_random_bytes(&fnew->hashrnd, 4);
 	}
 
-	fnew->perturb_timer.function = flow_perturbation;
-	fnew->perturb_timer.data = (unsigned long)fnew;
-	init_timer_deferrable(&fnew->perturb_timer);
+	setup_deferrable_timer(&fnew->perturb_timer, flow_perturbation,
+			       (unsigned long)fnew);
 
 	tcf_exts_change(tp, &fnew->exts, &e);
 	tcf_em_tree_change(tp, &fnew->ematches, &t);

net/sched/sch_sfq.c

@@ -714,9 +714,8 @@ static int sfq_init(struct Qdisc *sch, struct nlattr *opt)
 	struct sfq_sched_data *q = qdisc_priv(sch);
 	int i;
 
-	q->perturb_timer.function = sfq_perturbation;
-	q->perturb_timer.data = (unsigned long)sch;
-	init_timer_deferrable(&q->perturb_timer);
+	setup_deferrable_timer(&q->perturb_timer, sfq_perturbation,
+			       (unsigned long)sch);
 
 	for (i = 0; i < SFQ_MAX_DEPTH + 1; i++) {
 		q->dep[i].next = i + SFQ_MAX_FLOWS;