net_sched: make tcf_hash_destroy() static

tcf_hash_destroy() used once. Make it static.
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/act_api.h

@@ -111,7 +111,6 @@ struct tc_action_ops {
 };
 
 int tcf_hash_search(struct tc_action *a, u32 index);
-void tcf_hash_destroy(struct tc_action *a);
 u32 tcf_hash_new_index(struct tcf_hashinfo *hinfo);
 int tcf_hash_check(u32 index, struct tc_action *a, int bind);
 int tcf_hash_create(u32 index, struct nlattr *est, struct tc_action *a,

net/sched/act_api.c

@@ -36,7 +36,7 @@ static void free_tcf(struct rcu_head *head)
 	kfree(p);
 }
 
-void tcf_hash_destroy(struct tc_action *a)
+static void tcf_hash_destroy(struct tc_action *a)
 {
 	struct tcf_common *p = a->priv;
 	struct tcf_hashinfo *hinfo = a->ops->hinfo;
@@ -52,7 +52,6 @@ void tcf_hash_destroy(struct tc_action *a)
 	 */
 	call_rcu(&p->tcfc_rcu, free_tcf);
 }
-EXPORT_SYMBOL(tcf_hash_destroy);
 
 int __tcf_hash_release(struct tc_action *a, bool bind, bool strict)
 {