regulatory: remove useless locking on exit

It would be a major problem if anything were to run
concurrently while the module is being unloaded so
remove the locking that doesn't help anything.

Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/wireless/reg.c

@@ -2382,34 +2382,29 @@ void regulatory_exit(void)
 	cancel_work_sync(&reg_work);
 	cancel_delayed_work_sync(&reg_timeout);
 
+	/* Lock to suppress warnings */
 	mutex_lock(&cfg80211_mutex);
 	mutex_lock(&reg_mutex);
-
 	reset_regdomains(true);
+	mutex_unlock(&cfg80211_mutex);
+	mutex_unlock(&reg_mutex);
 
 	dev_set_uevent_suppress(&reg_pdev->dev, true);
 
 	platform_device_unregister(reg_pdev);
 
-	spin_lock_bh(&reg_pending_beacons_lock);
 	list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
 		list_del(&reg_beacon->list);
 		kfree(reg_beacon);
 	}
-	spin_unlock_bh(&reg_pending_beacons_lock);
 
 	list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
 		list_del(&reg_beacon->list);
 		kfree(reg_beacon);
 	}
 
-	spin_lock(&reg_requests_lock);
 	list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {
 		list_del(&reg_request->list);
 		kfree(reg_request);
 	}
-	spin_unlock(&reg_requests_lock);
-
-	mutex_unlock(&reg_mutex);
-	mutex_unlock(&cfg80211_mutex);
 }