ipv4: Merge ip_local_out and ip_local_out_sk

It is confusing and silly hiding a parameter so modify all of
the callers to pass in the appropriate socket or skb->sk if
no socket is known.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 66c627b..10366ee 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -108,7 +108,7 @@
 		       dst_output);
 }
 
-int ip_local_out_sk(struct sock *sk, struct sk_buff *skb)
+int ip_local_out(struct sock *sk, struct sk_buff *skb)
 {
 	struct net *net = dev_net(skb_dst(skb)->dev);
 	int err;
@@ -119,7 +119,7 @@
 
 	return err;
 }
-EXPORT_SYMBOL_GPL(ip_local_out_sk);
+EXPORT_SYMBOL_GPL(ip_local_out);
 
 static inline int ip_select_ttl(struct inet_sock *inet, struct dst_entry *dst)
 {
@@ -169,7 +169,7 @@
 	skb->mark = sk->sk_mark;
 
 	/* Send it out. */
-	return ip_local_out(skb);
+	return ip_local_out(skb->sk, skb);
 }
 EXPORT_SYMBOL_GPL(ip_build_and_send_pkt);
 
@@ -456,7 +456,7 @@
 	skb->priority = sk->sk_priority;
 	skb->mark = sk->sk_mark;
 
-	res = ip_local_out_sk(sk, skb);
+	res = ip_local_out(sk, skb);
 	rcu_read_unlock();
 	return res;
 
@@ -1436,7 +1436,7 @@
 {
 	int err;
 
-	err = ip_local_out(skb);
+	err = ip_local_out(skb->sk, skb);
 	if (err) {
 		if (err > 0)
 			err = net_xmit_errno(err);