ipv4: Pass flow key down into ip_append_*().

This way rt->rt_dst accesses are unnecessary.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ip.h b/include/net/ip.h
index a425379..0b30d3a 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -106,7 +106,7 @@
 extern int		ip_local_out(struct sk_buff *skb);
 extern int		ip_queue_xmit(struct sk_buff *skb, struct flowi *fl);
 extern void		ip_init(void);
-extern int		ip_append_data(struct sock *sk,
+extern int		ip_append_data(struct sock *sk, struct flowi4 *fl4,
 				       int getfrag(void *from, char *to, int offset, int len,
 						   int odd, struct sk_buff *skb),
 				void *from, int len, int protolen,
@@ -114,7 +114,7 @@
 				struct rtable **rt,
 				unsigned int flags);
 extern int		ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb);
-extern ssize_t		ip_append_page(struct sock *sk, struct page *page,
+extern ssize_t		ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page,
 				int offset, size_t size, int flags);
 extern struct sk_buff  *__ip_make_skb(struct sock *sk,
 				      struct flowi4 *fl4,