netns: place rt_genid into struct net

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/netns/ipv4.h

@@ -48,5 +48,6 @@ struct netns_ipv4 {
 	int sysctl_icmp_errors_use_inbound_ifaddr;
 
 	struct timer_list rt_secret_timer;
+	atomic_t rt_genid;
 };
 #endif