tree 1f3d2c9b76f1b97c5e264c36884ccdfc530cfee9
parent 29e98242783ed3ba569797846a606ba66f781625
author Vlad Yasevich <vyasevic@redhat.com> 1400274293 -0400
committer David S. Miller <davem@davemloft.net> 1400292889 -0400

net: Find the nesting level of a given device by type.

Multiple devices in the kernel can be stacked/nested and they
need to know their nesting level for the purposes of lockdep.
This patch provides a generic function that determines a nesting
level of a particular device by its type (ex: vlan, macvlan, etc).
We only care about nesting of the same type of devices.

For example:
  eth0 <- vlan0.10 <- macvlan0 <- vlan1.20

The nesting level of vlan1.20 would be 1, since there is another vlan
in the stack under it.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>