qdisc: make args to qdisc_create_default const

Fixes warnings introduced by the qdisc default patch.

Signed-off-by: Stephen Hemminger <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

include/net/sch_generic.h

···
 void qdisc_destroy(struct Qdisc *qdisc);
 void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n);
 struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
-			  struct Qdisc_ops *ops);
+			  const struct Qdisc_ops *ops);
 struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue,
-				struct Qdisc_ops *ops, u32 parentid);
+				const struct Qdisc_ops *ops, u32 parentid);
 void __qdisc_calculate_pkt_len(struct sk_buff *skb,
 			       const struct qdisc_size_table *stab);
 void tcf_destroy(struct tcf_proto *tp);

net/sched/sch_generic.c

···
 static struct lock_class_key qdisc_tx_busylock;
 
 struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
-			  struct Qdisc_ops *ops)
+			  const struct Qdisc_ops *ops)
 {
 	void *p;
 	struct Qdisc *sch;
···
 }
 
 struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue,
-				struct Qdisc_ops *ops, unsigned int parentid)
+				const struct Qdisc_ops *ops,
+				unsigned int parentid)
 {
 	struct Qdisc *sch;