o ipv6: use revised net module infrastructure

Using sk_set_owner and having THIS_MODULE in the struct proto_ops
registered with the core, also remove the MOD_{INC,DEC}_USE_COUNT,
as they are not needed anymore with this new net module infrastructure
for struct sock and struct socket. (well, see the netdev discussion :)

net/ipv6/af_inet6.c

@@ -193,6 +193,7 @@ static int inet6_create(struct socket *sock, int protocol)
 
 	sock->ops = answer->ops;
 	sock_init_data(sock, sk);
+	sk_set_owner(sk, THIS_MODULE);
 
 	sk->prot = answer->prot;
 	sk->no_check = answer->no_check;
@@ -498,7 +499,7 @@ int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 
 struct proto_ops inet6_stream_ops = {
 	.family =	PF_INET6,
-
+	.owner =	THIS_MODULE,
 	.release =	inet6_release,
 	.bind =		inet6_bind,
 	.connect =	inet_stream_connect,		/* ok		*/
@@ -519,7 +520,7 @@ struct proto_ops inet6_stream_ops = {
 
 struct proto_ops inet6_dgram_ops = {
 	.family =	PF_INET6,
-
+	.owner =	THIS_MODULE,
 	.release =	inet6_release,
 	.bind =		inet6_bind,
 	.connect =	inet_dgram_connect,		/* ok		*/

net/ipv6/tcp_ipv6.c

@@ -1308,7 +1308,6 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
 #ifdef INET_REFCNT_DEBUG
 		atomic_inc(&inet6_sock_nr);
 #endif
-		MOD_INC_USE_COUNT;
 
 		/* It is tricky place. Until this moment IPv4 tcp
 		   worked with IPv6 af_tcp.af_specific.
@@ -1358,7 +1357,6 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
 #ifdef INET_REFCNT_DEBUG
 	atomic_inc(&inet6_sock_nr);
 #endif
-	MOD_INC_USE_COUNT;
 
 	ip6_dst_store(newsk, dst, NULL);
 	sk->route_caps = dst->dev->features&~(NETIF_F_IP_CSUM|NETIF_F_TSO);