netfilter: ipv4: remove useless export_symbol

Only one caller; place it where needed and get rid of the EXPORT_SYMBOL.

Signed-off-by: Florian Westphal <[e-mail]>
Signed-off-by: Pablo Neira Ayuso <[e-mail]>

include/linux/netfilter_ipv4.h

···
 		       unsigned int dataoff, u_int8_t protocol);
 int nf_ip_route(struct net *net, struct dst_entry **dst, struct flowi *fl,
 		bool strict);
-int nf_ip_reroute(struct sk_buff *skb, const struct nf_queue_entry *entry);
 #else
 static inline __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
 				     unsigned int dataoff, u_int8_t protocol)
···
 }
 static inline int nf_ip_route(struct net *net, struct dst_entry **dst,
 			      struct flowi *fl, bool strict)
-{
-	return -EOPNOTSUPP;
-}
-static inline int nf_ip_reroute(struct sk_buff *skb,
-				const struct nf_queue_entry *entry)
 {
 	return -EOPNOTSUPP;
 }

net/ipv4/netfilter.c

···
 }
 EXPORT_SYMBOL(ip_route_me_harder);
 
-int nf_ip_reroute(struct sk_buff *skb, const struct nf_queue_entry *entry)
-{
-	const struct ip_rt_info *rt_info = nf_queue_entry_reroute(entry);
-
-	if (entry->state.hook == NF_INET_LOCAL_OUT) {
-		const struct iphdr *iph = ip_hdr(skb);
-
-		if (!(iph->tos == rt_info->tos &&
-		      skb->mark == rt_info->mark &&
-		      iph->daddr == rt_info->daddr &&
-		      iph->saddr == rt_info->saddr))
-			return ip_route_me_harder(entry->state.net, skb,
-						  RTN_UNSPEC);
-	}
-	return 0;
-}
-EXPORT_SYMBOL_GPL(nf_ip_reroute);
-
 int nf_ip_route(struct net *net, struct dst_entry **dst, struct flowi *fl,
 		bool strict __always_unused)
 {

net/netfilter/utils.c

···
 }
 EXPORT_SYMBOL_GPL(nf_route);
 
+static int nf_ip_reroute(struct sk_buff *skb, const struct nf_queue_entry *entry)
+{
+#ifdef CONFIG_INET
+	const struct ip_rt_info *rt_info = nf_queue_entry_reroute(entry);
+
+	if (entry->state.hook == NF_INET_LOCAL_OUT) {
+		const struct iphdr *iph = ip_hdr(skb);
+
+		if (!(iph->tos == rt_info->tos &&
+		      skb->mark == rt_info->mark &&
+		      iph->daddr == rt_info->daddr &&
+		      iph->saddr == rt_info->saddr))
+			return ip_route_me_harder(entry->state.net, skb,
+						  RTN_UNSPEC);
+	}
+#endif
+	return 0;
+}
+
 int nf_reroute(struct sk_buff *skb, struct nf_queue_entry *entry)
 {
 	const struct nf_ipv6_ops *v6ops;