linux-kernel - Re: linux-next-20251029

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Message-ID: <CAO=gReF+sWpKZFa+wbtGxa3+wSjAQG1UMG3iJaDt2EOPmH-7mQ@mail.gmail.com>
Date: Wed, 5 Nov 2025 18:34:05 -0800
From: Amit Dhingra <mechanicalamit@...il.com>
To: Timur Kristóf <timur.kristof@...il.com>
Cc: Valdis Klētnieks <valdis.kletnieks@...edu>, 
	Alex Deucher <alexander.deucher@....com>, Leo Li <sunpeng.li@....com>, 
	David Airlie <airlied@...il.com>, amd-gfx list <amd-gfx@...ts.freedesktop.org>, 
	dri-devel <dri-devel@...ts.freedesktop.org>, linux-kernel@...r.kernel.org
Subject: Re: linux-next-20251029 - build error in amdgpu

On Sun, Nov 02, 2025 at 10:27:54AM +0100, Timur Kristóf wrote:
> Hello Valdis,
>
> I use Fedora and I developed that patch on Fedora, using the same GCC
> version. It did not give me an error or warning when I wrote the patch. It
> is still not giving me an error or warning about that code now.
>
> I am working with the amd-staging-drm-next branch.
>
> What do I need to do to trigger the warning?
>
I have the same problem.

linux-next on Arch Linux
GCC : 15.2.1 20250813


Steps to reproduce the error
- make mrproper
- make allmodconfig
- make drivers/gpu/drm/amd/amdgpu/

Turns out its due to randconfig, See [1]

Setting RANDSTRUCT_NONE=y seems to stop the error.

[1] https://lore.kernel.org/all/2025062439-tamer-diner-68e9@gregkh/

- Amit

> Thanks & best regards,
> Timur
>
> Valdis Klētnieks <valdis.kletnieks@...edu> ezt írta (időpont: 2025. nov.
> 2., Vas 1:59):
>
> > On Thu, 30 Oct 2025 19:05:30 +0100, Timur Kristóf said:
> >
> > > Can you say how to reproduce that?
> > > I use the same version of GCC but it hasn't given me any warning or
> > > error for that patch.
> >
> > Upon further testing,
> >
> > [/usr/src/linux-next] make
> >
> > is sufficient on my system. Turns out that it errors out even without W=1.
> > My
> > next guess was that it had to do with -Werror, which would cause warnings
> > to
> > be treated as errors, but my .config has
> >
> > # CONFIG_WERROR is not set
> > # CONFIG_DRM_WERROR is not set
> > # CONFIG_DRM_AMDGPU_WERROR is not set
> >
> > Do you perhaps have patches in your tree that aren't in next-20251029?
> >
> > I wonder if Fedora's build of gcc 15.2.1 is different somehow from the
> > build you're using....
> >
> >
> >
> >