[TCP]: Consolidate checking for tcp orphan count being too big.

tcp_out_of_resources() and tcp_close() perform the
same checking of number of orphan sockets. Move this
code into common place.

Signed-off-by: Pavel Emelianov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 2ca97b2..e613401 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -78,9 +78,7 @@
 	if (sk->sk_err_soft)
 		orphans <<= 1;
 
-	if (orphans >= sysctl_tcp_max_orphans ||
-	    (sk->sk_wmem_queued > SOCK_MIN_SNDBUF &&
-	     atomic_read(&tcp_memory_allocated) > sysctl_tcp_mem[2])) {
+	if (tcp_too_many_orphans(sk, orphans)) {
 		if (net_ratelimit())
 			printk(KERN_INFO "Out of socket memory\n");