[IPX]: Use existing sock refcnt debugging infrastructure

Just like in the af_packet.c, the ipx_sock_nr variable is used
for debugging purposes.

Switch to using existing infrastructure. Thanks to Arnaldo for
pointing this out.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipx/af_ipx.c

@@ -92,11 +92,6 @@ extern int ipxrtr_route_skb(struct sk_buff *skb);
 extern struct ipx_route *ipxrtr_lookup(__be32 net);
 extern int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
 
-#undef IPX_REFCNT_DEBUG
-#ifdef IPX_REFCNT_DEBUG
-atomic_t ipx_sock_nr;
-#endif
-
 struct ipx_interface *ipx_interfaces_head(void)
 {
 	struct ipx_interface *rc = NULL;
@@ -151,14 +146,7 @@ static void ipx_destroy_socket(struct sock *sk)
 {
 	ipx_remove_socket(sk);
 	skb_queue_purge(&sk->sk_receive_queue);
-#ifdef IPX_REFCNT_DEBUG
-	atomic_dec(&ipx_sock_nr);
-	printk(KERN_DEBUG "IPX socket %p released, %d are still alive\n", sk,
-			atomic_read(&ipx_sock_nr));
-	if (atomic_read(&sk->sk_refcnt) != 1)
-		printk(KERN_DEBUG "Destruction sock ipx %p delayed, cnt=%d\n",
-				sk, atomic_read(&sk->sk_refcnt));
-#endif
+	sk_refcnt_debug_dec(sk);
 	sock_put(sk);
 }
 
@@ -1384,11 +1372,8 @@ static int ipx_create(struct net *net, struct socket *sock, int protocol)
 	sk = sk_alloc(net, PF_IPX, GFP_KERNEL, &ipx_proto);
 	if (!sk)
 		goto out;
-#ifdef IPX_REFCNT_DEBUG
-	atomic_inc(&ipx_sock_nr);
-	printk(KERN_DEBUG "IPX socket %p created, now we have %d alive\n", sk,
-			atomic_read(&ipx_sock_nr));
-#endif
+
+	sk_refcnt_debug_inc(sk);
 	sock_init_data(sock, sk);
 	sk->sk_no_check = 1;		/* Checksum off by default */
 	sock->ops = &ipx_dgram_ops;
@@ -1409,6 +1394,7 @@ static int ipx_release(struct socket *sock)
 
 	sock_set_flag(sk, SOCK_DEAD);
 	sock->sk = NULL;
+	sk_refcnt_debug_release(sk);
 	ipx_destroy_socket(sk);
 out:
 	return 0;