Re: Linux 5.19-rc6

[Guenter Roeck]

On 7/13/22 12:36, Linus Torvalds wrote:
> On Tue, Jul 12, 2022 at 10:07 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
> > Same problems as every week.
> >
> > Building powerpc:allmodconfig ... failed
>
> Ok, this has been going on since -rc1, which is much too long.
>
> > From your patch submission that that was rejected:
>
> > The problem was introduced with commit 41b7a347bf14 ("powerpc: Book3S
> > 64-bit outline-only KASAN support") which adds support for KASAN. This
> > commit in turn enables DRM_AMD_DC_DCN because KCOV_INSTRUMENT_ALL and
> > KCOV_ENABLE_COMPARISONS are no longer enabled. As result, new files are
> > compiled which lack the selection of hard-float.
>
> And considering that neither the ppc people nor the drm people seem
> interested in fixing this, and it doesn't revert cleanly I think the
> sane solution seems to be to just remove PPC64 support for DRM_AMD_DC
> entirely.
>
> IOW, does something like this (obviously nor a proper patch, but you
> get the idea) fix the ppc build for you?
>
>    @@ -6,7 +6,7 @@ config DRM_AMD_DC
>            bool "AMD DC - Enable new display engine"
>            default y
>            select SND_HDA_COMPONENT if SND_HDA_CORE
>    -       select DRM_AMD_DC_DCN if (X86 || PPC64) &&
> !(KCOV_INSTRUMENT_ALL && KCOV_ENABLE_COMPARISONS)
>    +       select DRM_AMD_DC_DCN if X86 && !(KCOV_INSTRUMENT_ALL &&
> KCOV_ENABLE_COMPARISONS)
>            help
>              Choose this option if you want to use the new display engine
>              support for AMDGPU. This adds required support for Vega and

It does, but I can't imagine that the drm or ppc people would be happy
about it.

Guenter