net: use batched device unregister in veth and macvlan

veth devices dont use the batched device unregisters yet.

Since veth are a pair of devices, it makes sense to use a batch of two
unregisters, this roughly divides dismantle time by two.

Fix this by changing dellink() callers to always provide a non NULL
head. (Idea from Michał Mirosław)

This patch also handles macvlan case : We now dismantle all macvlans on
top of a lower dev at once.

Reported-by: Alex Bligh <[email protected]>
Signed-off-by: Eric Dumazet <[email protected]>
Cc: Michał Mirosław <[email protected]>
Cc: Jesse Gross <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Cc: Ben Greear <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

0 files changed, 0 insertions, 0 deletions