diff -urN a/net/wireless/reg.c b/net/wireless/reg.c
--- a/net/wireless/reg.c	2016-06-14 14:35:12.117156820 +0800
+++ b/net/wireless/reg.c	2016-06-14 14:35:04.401156694 +0800
@@ -179,7 +179,7 @@
 out:
 	return regd->dfs_region;
 }
-
+EXPORT_SYMBOL(reg_get_dfs_region);
 static void rcu_free_regdom(const struct ieee80211_regdomain *r)
 {
 	if (!r)
