net: sched: constify tcf_proto and tc_action

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/cls_u32.c

diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 3b93fc0c..939b627 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -93,7 +93,7 @@
 	return h;
 }
 
-static int u32_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res)
+static int u32_classify(struct sk_buff *skb, const struct tcf_proto *tp, struct tcf_result *res)
 {
 	struct {
 		struct tc_u_knode *knode;