Staging kernel failing to build on 32bit

[Jeremy Newton]

Hi,

Heads up to whoever is using or developing for the following kernel branch:

https://cgit.freedesktop.org/~agd5f/linux/tree/?h=amd-staging-4.9

It seems like a recent commit has caused 32bit builds to fail. I haven't
been able to look into it myself or do a bisect, but it seems like it was
something committed between Jan 25th (d0c15b8) and Feb 2nd (99eb22d) caused
it.

Here's the error output:

ERROR: "__udivdi3" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
scripts/Makefile.modpost:91: recipe for target '__modpost' failed
Makefile:1200: recipe for target 'modules' failed
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2

After a quick glance, it seems similar to a previous kernel commit:
https://cgit.freedesktop.org/~agd5f/linux/commit/?id=1f827f5138292a6124430cdd37bcb68f30c05467
<https://cgit.freedesktop.org/~agd5f/linux/commit/?h=amd-staging-4.9&id=1f827f5138292a6124430cdd37bcb68f30c05467>

just a shot in the dark, but it could be caused by this commit:
https://cgit.freedesktop.org/~agd5f/linux/commit/?h=amd-staging-4.9&id=7adb2bbcdf7259533c5afc95c4a788b59bb59306

As it's the only one I see with 64 bit division in it. As I said, shot in
the dark here.

Thanks!
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