batman-adv: document cleanup of batadv_wifi_net_devices entries

It doesn't seem to be obvious how the entries from the
batadv_wifi_net_devices rhashtable are getting removed before the actual
rhashtable is destroyed. Document the idea behind the process and which
steps are involved.

Signed-off-by: Sven Eckelmann <sven@narfation.org>

diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index 04b227ec8052511e768e9f2591058e22e504eb03..e2c85bd8dbb53274a9f684e8164e4721ba280b51 100644 (file)
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -1185,5 +1185,9 @@ int __init batadv_wifi_net_devices_init(void)
  */
 void batadv_wifi_net_devices_deinit(void)
 {
+       /* just destroy table. entries should have been removed by
+        * unregister_netdevice_notifier() and the corresponding
+        * NETDEV_UNREGISTER events
+        */
        rhashtable_destroy(&batadv_wifi_net_devices);
 }