Use __tcf_generic_walker() and __tcf_idr_search() helpers by saving
nat_net_id when registering act_nat_ops. And then remove the walk
and lookup hook functions in act_nat.

Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
---
 net/sched/act_nat.c | 20 +-------------------
 1 file changed, 1 insertion(+), 19 deletions(-)

diff --git a/net/sched/act_nat.c b/net/sched/act_nat.c
index 2a39b3729e84..c95601bc738c 100644
--- a/net/sched/act_nat.c
+++ b/net/sched/act_nat.c
@@ -289,32 +289,14 @@ static int tcf_nat_dump(struct sk_buff *skb, struct tc_action *a,
 	return -1;
 }
 
-static int tcf_nat_walker(struct net *net, struct sk_buff *skb,
-			  struct netlink_callback *cb, int type,
-			  const struct tc_action_ops *ops,
-			  struct netlink_ext_ack *extack)
-{
-	struct tc_action_net *tn = net_generic(net, nat_net_id);
-
-	return tcf_generic_walker(tn, skb, cb, type, ops, extack);
-}
-
-static int tcf_nat_search(struct net *net, struct tc_action **a, u32 index)
-{
-	struct tc_action_net *tn = net_generic(net, nat_net_id);
-
-	return tcf_idr_search(tn, a, index);
-}
-
 static struct tc_action_ops act_nat_ops = {
 	.kind		=	"nat",
 	.id		=	TCA_ID_NAT,
+	.net_id		=	&nat_net_id,
 	.owner		=	THIS_MODULE,
 	.act		=	tcf_nat_act,
 	.dump		=	tcf_nat_dump,
 	.init		=	tcf_nat_init,
-	.walk		=	tcf_nat_walker,
-	.lookup		=	tcf_nat_search,
 	.size		=	sizeof(struct tcf_nat),
 };
 
-- 
2.17.1