linux-kernel - Re: [PATCH v2 2/2] docs: changes: better document Python needs

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Message-ID: <CAL_JsqJV4JgWMn+w7XFX=ixnwWW=_buisp0fF_B-2NmbpmMTqw@mail.gmail.com>
Date: Mon, 4 Aug 2025 13:08:19 -0500
From: Rob Herring <robh@...nel.org>
To: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc: Jonathan Corbet <corbet@....net>, Linux Doc Mailing List <linux-doc@...r.kernel.org>, 
	linux-kernel@...r.kernel.org, workflows@...r.kernel.org
Subject: Re: [PATCH v2 2/2] docs: changes: better document Python needs

On Tue, Jul 29, 2025 at 11:44 AM Mauro Carvalho Chehab
<mchehab+huawei@...nel.org> wrote:
>
> Python is listed as an optional dependency, but this is not
> true, as:
>
> 1) arm (multi_v7_defconfig and other defconfigs) and arm64 defconfig
>    needs it due to DRM_MSM dependencies;
>
> 2) CONFIG_LTO_CLANG runs a python script at scripts/Makefile.vmlinux_o;
>
> 3) kernel-doc is called during compilation when some DRM options
>    like CONFIG_DRM_I915_WERROR are enabled;
>
> 4) allyesconfig/allmodconfig will enable CONFIG_* dependencies
>    that needs it;
>
> 5) besides DRM, other subsystems seem to have logic calling *.py
>    scripts.
>
> So, better document that and change the dependency from optional
> to mandatory to reflect the current needs.
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> ---
>  Documentation/process/changes.rst | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)

DT schema checks requires it too.

Acked-by: Rob Herring (Arm) <robh@...nel.org>