tcp: Namespace-ify sysctl_tcp_fack

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 3875fdf..f0e792b 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -136,6 +136,7 @@ struct netns_ipv4 {
 	int sysctl_tcp_stdurg;
 	int sysctl_tcp_rfc1337;
 	int sysctl_tcp_abort_on_overflow;
+	int sysctl_tcp_fack;
 	struct inet_timewait_death_row tcp_death_row;
 	int sysctl_max_syn_backlog;
 	int sysctl_tcp_fastopen;