[DCCP]: Move dccp_[un]hash from ipv4.c to the core

As this is used by both ipv4 and ipv6 and is not ipv4 specific.
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dccp/dccp.h

@@ -238,6 +238,7 @@ extern struct sk_buff	*dccp_make_response(struct sock *sk,
 
 extern int	   dccp_connect(struct sock *sk);
 extern int	   dccp_disconnect(struct sock *sk, int flags);
+extern void	   dccp_hash(struct sock *sk);
 extern void	   dccp_unhash(struct sock *sk);
 extern int	   dccp_getsockopt(struct sock *sk, int level, int optname,
 				   char __user *optval, int __user *optlen);

net/dccp/ipv4.c

@@ -44,18 +44,6 @@ static int dccp_v4_get_port(struct sock *sk, const unsigned short snum)
 				 inet_csk_bind_conflict);
 }
 
-static void dccp_v4_hash(struct sock *sk)
-{
-	inet_hash(&dccp_hashinfo, sk);
-}
-
-void dccp_unhash(struct sock *sk)
-{
-	inet_unhash(&dccp_hashinfo, sk);
-}
-
-EXPORT_SYMBOL_GPL(dccp_unhash);
-
 int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 {
 	struct inet_sock *inet = inet_sk(sk);
@@ -1048,7 +1036,7 @@ struct proto dccp_prot = {
 	.sendmsg		= dccp_sendmsg,
 	.recvmsg		= dccp_recvmsg,
 	.backlog_rcv		= dccp_v4_do_rcv,
-	.hash			= dccp_v4_hash,
+	.hash			= dccp_hash,
 	.unhash			= dccp_unhash,
 	.accept			= inet_csk_accept,
 	.get_port		= dccp_v4_get_port,

net/dccp/ipv6.c

@@ -53,7 +53,7 @@ static void dccp_v6_hash(struct sock *sk)
 {
 	if (sk->sk_state != DCCP_CLOSED) {
 		if (inet_csk(sk)->icsk_af_ops == &dccp_ipv6_mapped) {
-			dccp_prot.hash(sk);
+			dccp_hash(sk);
 			return;
 		}
 		local_bh_disable();

net/dccp/proto.c

@@ -97,6 +97,20 @@ const char *dccp_state_name(const int state)
 
 EXPORT_SYMBOL_GPL(dccp_state_name);
 
+void dccp_hash(struct sock *sk)
+{
+	inet_hash(&dccp_hashinfo, sk);
+}
+
+EXPORT_SYMBOL_GPL(dccp_hash);
+
+void dccp_unhash(struct sock *sk)
+{
+	inet_unhash(&dccp_hashinfo, sk);
+}
+
+EXPORT_SYMBOL_GPL(dccp_unhash);
+
 int dccp_init_sock(struct sock *sk)
 {
 	struct dccp_sock *dp = dccp_sk(sk);