o af_key: remove MOD_{INC,DEC}_USE_COUNT

Now the core networking infrastructure will (finally) do that for the net
protocol families, its just a matter of setting the ->owner field in the
registered struct net_proto_family to THIS_MODULE.

net/core/dev.c

@@ -1434,7 +1434,7 @@ static void net_tx_action(struct softirq_action *h)
 }
 
 #if defined(CONFIG_BRIDGE) || defined (CONFIG_BRIDGE_MODULE)
-int (*br_handle_frame_hook)(struct sk_buff *skb) = NULL;
+int (*br_handle_frame_hook)(struct sk_buff *skb);
 
 static __inline__ int handle_bridge(struct sk_buff *skb,
 				     struct packet_type *pt_prev)

net/key/af_key.c

@@ -63,8 +63,6 @@ static void pfkey_sock_destruct(struct sock *sk)
 	kfree(pfkey_sk(sk));
 
 	atomic_dec(&pfkey_socks_nr);
-
-	MOD_DEC_USE_COUNT;
 }
 
 static void pfkey_table_grab(void)
@@ -150,8 +148,6 @@ static int pfkey_create(struct socket *sock, int protocol)
 	if (protocol != PF_KEY_V2)
 		return -EPROTONOSUPPORT;
 
-	MOD_INC_USE_COUNT;
-
 	err = -ENOMEM;
 	sk = sk_alloc(PF_KEY, GFP_KERNEL, 1, NULL);
 	if (sk == NULL)
@@ -176,9 +172,7 @@ static int pfkey_create(struct socket *sock, int protocol)
 	pfkey_insert(sk);
 
 	return 0;
-
 out:
-	MOD_DEC_USE_COUNT;
 	return err;
 }
 
@@ -2792,6 +2786,7 @@ static struct proto_ops pfkey_ops = {
 static struct net_proto_family pfkey_family_ops = {
 	.family	=	PF_KEY,
 	.create	=	pfkey_create,
+	.owner	=	THIS_MODULE,
 };
 
 #ifdef CONFIG_PROC_FS