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>
diff --git a/net/sched/act_skbedit.c b/net/sched/act_skbedit.c
index 5f6f0c7..35dbbe9 100644
--- a/net/sched/act_skbedit.c
+++ b/net/sched/act_skbedit.c
@@ -39,7 +39,7 @@
 	.lock	=	&skbedit_lock,
 };
 
-static int tcf_skbedit(struct sk_buff *skb, struct tc_action *a,
+static int tcf_skbedit(struct sk_buff *skb, const struct tc_action *a,
 		       struct tcf_result *res)
 {
 	struct tcf_skbedit *d = a->priv;