Fix netmap emulated mode for FreeBSD 11 versions

[Luiz Otavio O Souza]

On 19 January 2017 at 09:11, Vincenzo Maffione wrote:
> Hi,
>
>   A change in mb_free_ext() introduced in FreeBSD 11 versions broke the
> transmission support for netmap in emulated mode. This means immediate
> kernel crashes for netmap users in non-native (emulated) mode.
>
> This problem has been fixed in FreeBSD-12-CURRENT, which contains a recent
> version of Netmap. However, FreeBSD 11 versions (release, stable) are still
> affected, as they contain old Netmap versions.
> Is it possible to push the fix (provided by me) to the relevant
> release/stable branches? What is the procedure (I'm not familiar with the
> FreeBSD release engineering process)?

Hi Vincenzo,

Yeah, I saw that trying netmap on ARM (running with emulated drivers)
and I can confirm that it is fixed on -head.

Please, send me the fix and I'll get it committed on stable/11 (this
is a common situation and the fix can be committed directly into the
affected branch).

Thanks!
Luiz