linux-kernel - Re: Build regressions/improvements in v5.7-rc4

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Date:   Mon, 4 May 2020 09:32:27 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:     Timothy Pearson <tpearson@...torengineering.com>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: Build regressions/improvements in v5.7-rc4

On Mon, May 4, 2020 at 9:24 AM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> JFYI, when comparing v5.7-rc4[1] to v5.7-rc3[3], the summaries are:
>   - build errors: +3/-123

> [1] http://kisskb.ellerman.id.au/kisskb/branch/linus/head/0e698dfa282211e414076f9dc7e83c1c288314fd/ (all 239 configs)
> [3] http://kisskb.ellerman.id.au/kisskb/branch/linus/head/6a8b55ed4056ea5559ebe4f6a4b247f627870d4c/ (all 239 configs)

It's back:

  + /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:
error: implicit declaration of function 'cpu_has_feature'
[-Werror=implicit-function-declaration]:  => 626:2
  + /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:
error: implicit declaration of function 'disable_kernel_vsx'
[-Werror=implicit-function-declaration]:  => 662:2
  + /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:
error: implicit declaration of function 'enable_kernel_vsx'
[-Werror=implicit-function-declaration]:  => 626:2

powerpc-gcc4.6/ppc64_book3e_allmodconfig

powerpc-gcc9/ppc64_book3e_allmodconfig builds fine, as it doesn't have
DRM_AMD_DC_DCN, enabled due to:

    select DRM_AMD_DC_DCN if (X86 || PPC64) && !(KCOV_INSTRUMENT_ALL
&& KCOV_ENABLE_COMPARISONS)

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds