net: file_operations should be const

All instances of file_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/mac80211/rc80211_minstrel_debugfs.c b/net/mac80211/rc80211_minstrel_debugfs.c
index 3d72ec5..a715d94 100644
--- a/net/mac80211/rc80211_minstrel_debugfs.c
+++ b/net/mac80211/rc80211_minstrel_debugfs.c
@@ -139,7 +139,7 @@
 	return 0;
 }
 
-static struct file_operations minstrel_stat_fops = {
+static const struct file_operations minstrel_stat_fops = {
 	.owner = THIS_MODULE,
 	.open = minstrel_stats_open,
 	.read = minstrel_stats_read,