mainline build failure due to 7966f319c66d ("drm/amd/display: Introduce DML2")

[Alex Deucher]

On Thu, Nov 2, 2023 at 1:07 PM Sudip Mukherjee
<sudipm.mukherjee at gmail.com> wrote:
>
> On Thu, 2 Nov 2023 at 16:52, Alex Deucher <alexdeucher at gmail.com> wrote:
> >
> > On Thu, Nov 2, 2023 at 5:32 AM Sudip Mukherjee (Codethink)
> > <sudipm.mukherjee at gmail.com> wrote:
> > >
> > > Hi All,
> > >
> > > The latest mainline kernel branch fails to build x86_64 allmodconfig
> > > with the error:
> > >
> > > drivers/gpu/drm/amd/amdgpu/../display/dc/dml2/display_mode_core.c: In function 'dml_prefetch_check':
> > > drivers/gpu/drm/amd/amdgpu/../display/dc/dml2/display_mode_core.c:6707:1: error: the frame size of 2056 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
> > >  6707 | }
> > >       | ^
> > >
> > > git bisect pointed to 7966f319c66d ("drm/amd/display: Introduce DML2")
> > >
> > > I will be happy to test any patch or provide any extra log if needed.
> >
> > This was reported earlier and fixed by:
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=089dbf6a06f1dcaeed4f8b86d619e8d28b235207
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b141fa036c901303ca5659cc22e9c08f8b097892
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5b2c54e0d0ea09f7a3b500510731878326e1117e
> > but I guess maybe different compiler versions are still hitting this.
>
> Yes, I should have mentioned. gcc-11 and gcc-12 failed to build. but
> gcc-13 was ok.

Should be fixed with Nathan's patch:
https://patchwork.freedesktop.org/patch/565675/

Alex