net: seq_operations should be const

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/key/af_key.c b/net/key/af_key.c
index dba9abd..7b1e99b 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -3705,7 +3705,7 @@
 	read_unlock(&pfkey_table_lock);
 }
 
-static struct seq_operations pfkey_seq_ops = {
+static const struct seq_operations pfkey_seq_ops = {
 	.start	= pfkey_seq_start,
 	.next	= pfkey_seq_next,
 	.stop	= pfkey_seq_stop,