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_hybla.c b/net/ipv4/tcp_hybla.c
index 377bc93..fe3ecf4 100644
--- a/net/ipv4/tcp_hybla.c
+++ b/net/ipv4/tcp_hybla.c
@@ -162,7 +162,7 @@
 	tp->snd_cwnd = min_t(u32, tp->snd_cwnd, tp->snd_cwnd_clamp);
 }
 
-static struct tcp_congestion_ops tcp_hybla = {
+static struct tcp_congestion_ops tcp_hybla __read_mostly = {
 	.init		= hybla_init,
 	.ssthresh	= tcp_reno_ssthresh,
 	.min_cwnd	= tcp_reno_min_cwnd,