net: rtnetlink: ignore NETDEV_PRE_TYPE_CHANGE in rtnetlink_event()

Ignore the new NETDEV_PRE_TYPE_CHANGE event in rtnetlink_event() since
there have been no changes userspace needs to be notified of.

Also add a comment to the netdev notifier event definitions to remind
people to update the exclusion list when adding new event types.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/include/linux/notifier.h b/include/linux/notifier.h
index f3635fc6e942..9c5d3fad01f3 100644
--- a/include/linux/notifier.h
+++ b/include/linux/notifier.h
@@ -182,7 +182,10 @@ static inline int notifier_to_errno(int ret)
  *      VC switch chains (for loadable kernel svgalib VC switch helpers) etc...
  */
  
-/* netdevice notifier chain */
+/* netdevice notifier chain. Please remember to update the rtnetlink
+ * notification exclusion list in rtnetlink_event() when adding new
+ * types.
+ */
 #define NETDEV_UP       0x0001  /* For now you can't veto a device up/down */
 #define NETDEV_DOWN     0x0002
 #define NETDEV_REBOOT   0x0003  /* Tell a protocol stack a network interface