Questions about SLTS v4.19

["Luca Weiss" <luca.weiss@fairphone.com>]

Hi,

I've got some questions regarding the SLTS v4.19 tree which I couldn't
find an answer to on the website.

As Fairphone, one of our Android devices, Fairphone 4 is running on a
4.19 kernel fork which was provided by Qualcomm. Unfortunately
linux-stable support has run out and while we're looking into upgrading
the kernel to a newer version, for now we're stuck with 4.19.

Since CIP will continue maintaining the 4.19 kernel for the foreseeable
future, we were thinking about starting to merge the v4.19 CIP releases
into our tree, and continuing to do that for the foreseable future.

But it's not clear to me what is actually in scope for the 4.19 branch.
At
https://wiki.linuxfoundation.org/civilinfrastructureplatform/cipkernelmaintenance
I see the text "For the 4.4 branch, the architectures we've committed to
so far are arm (32-bit) and x86_64." but no info about 4.19, whether
arm64 will be included, which is what our device is running on.

And also while we're not a CIP member we'd like to know whether we can
consider the CIP branches to be reasonably equivalent to the
linux-stable branches, for example where we can assume that all known
(security) issues will be getting the fixes backported, or how else it
might differ from regular LTS.

Regards
Luca