git: if_tun: Use pointer to ifnet in tun_softc struct

[Aaron LI]

On Fri, 20 Jul 2018 09:40:21 +0800
Sepherosa Ziehau <sepherosa at gmail.com> wrote:

> Most of the physical drivers are ethernet ones, so they need arpcom;
> please do w/ care.

Sure, I have to understand the drivers more before really touching them.

> I am not quite sure why we want to use if_alloc() in the first place?

Since our if_alloc() is very simple, so there is no big benefit to use it
over the direct kmalloc().  But if_alloc() is easier to use and more
intuitive.

> We don't have the synchronization issue if_alloc() tries to address
> in FreeBSD.

Cool!


Cheers,
-- 
Aaron
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