ipv4: remove ip_rt_dump from route.c

ip_rt_dump do nothing after IPv4 route caches removal, so we can remove it.
Signed-off-by: NLi RongQing <roy.qing.li@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/route.h

@@ -191,7 +191,6 @@ unsigned int inet_dev_addr_type(struct net *net, const struct net_device *dev,
 void ip_rt_multicast_event(struct in_device *);
 int ip_rt_ioctl(struct net *, unsigned int cmd, void __user *arg);
 void ip_rt_get_source(u8 *src, struct sk_buff *skb, struct rtable *rt);
-int ip_rt_dump(struct sk_buff *skb,  struct netlink_callback *cb);
 
 struct in_ifaddr;
 void fib_add_ifaddr(struct in_ifaddr *);

net/ipv4/fib_frontend.c

@@ -659,7 +659,7 @@ static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
 
 	if (nlmsg_len(cb->nlh) >= sizeof(struct rtmsg) &&
 	    ((struct rtmsg *) nlmsg_data(cb->nlh))->rtm_flags & RTM_F_CLONED)
-		return ip_rt_dump(skb, cb);
+		return skb->len;
 
 	s_h = cb->args[0];
 	s_e = cb->args[1];

net/ipv4/route.c

@@ -2468,11 +2468,6 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh)
 	goto errout;
 }
 
-int ip_rt_dump(struct sk_buff *skb,  struct netlink_callback *cb)
-{
-	return skb->len;
-}
-
 void ip_rt_multicast_event(struct in_device *in_dev)
 {
 	rt_cache_flush(dev_net(in_dev->dev));