rps: rps_sock_flow_table is mostly read

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index d7107ac..7abf959 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2205,7 +2205,7 @@
 #ifdef CONFIG_RPS
 
 /* One global table that all flow-based protocols share. */
-struct rps_sock_flow_table *rps_sock_flow_table;
+struct rps_sock_flow_table *rps_sock_flow_table __read_mostly;
 EXPORT_SYMBOL(rps_sock_flow_table);
 
 /*