[IPV4]: make ip_fragment() static

Since there's no longer any external user of ip_fragment() we can make 
it static.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/ip.h

@@ -94,7 +94,6 @@ extern int		ip_local_deliver(struct sk_buff *skb);
 extern int		ip_mr_input(struct sk_buff *skb);
 extern int		ip_output(struct sk_buff *skb);
 extern int		ip_mc_output(struct sk_buff *skb);
-extern int		ip_fragment(struct sk_buff *skb, int (*out)(struct sk_buff*));
 extern int		ip_do_nat(struct sk_buff *skb);
 extern void		ip_send_check(struct iphdr *ip);
 extern int		ip_queue_xmit(struct sk_buff *skb, int ipfragok);

net/ipv4/ip_output.c

@@ -85,6 +85,8 @@
 
 int sysctl_ip_default_ttl = IPDEFTTL;
 
+static int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff*));
+
 /* Generate a checksum for an outgoing IP datagram. */
 __inline__ void ip_send_check(struct iphdr *iph)
 {
@@ -414,7 +416,7 @@ static void ip_copy_metadata(struct sk_buff *to, struct sk_buff *from)
  *	single device frame, and queue such a frame for sending.
  */
 
-int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff*))
+static int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff*))
 {
 	struct iphdr *iph;
 	int raw = 0;
@@ -1396,7 +1398,6 @@ void __init ip_init(void)
 #endif
 }
 
-EXPORT_SYMBOL(ip_fragment);
 EXPORT_SYMBOL(ip_generic_getfrag);
 EXPORT_SYMBOL(ip_queue_xmit);
 EXPORT_SYMBOL(ip_send_check);