On Sat, 2019-09-28 at 16:48 +0000, Taehee Yoo wrote:

This patch removes variables and callback these are related to the nested
device structure.
devices that can be nested have their own nest_level variable that
represents the depth of nested devices.
In the previous patch, new {lower/upper}_level variables are added and
they replace old private nest_level variable.
So, this patch removes all 'nest_level' variables.

Ah, well, I see at least this patch also needs the nesting level tracked
in the netdev, at least the "lower_level".

johannes