tcp: mark tcp_congestion_ops read_mostly

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/tcp_veno.c b/net/ipv4/tcp_veno.c
index 38bc0b5..ac43cd7 100644
--- a/net/ipv4/tcp_veno.c
+++ b/net/ipv4/tcp_veno.c
@@ -201,7 +201,7 @@
 		return max(tp->snd_cwnd >> 1U, 2U);
 }
 
-static struct tcp_congestion_ops tcp_veno = {
+static struct tcp_congestion_ops tcp_veno __read_mostly = {
 	.flags		= TCP_CONG_RTT_STAMP,
 	.init		= tcp_veno_init,
 	.ssthresh	= tcp_veno_ssthresh,