* [REGRESSION] next/master: (build) undefined reference to `devm_backlight_device_register' in vmlinux...
@ 2025-10-14 13:59 KernelCI bot
2025-10-16 3:47 ` Randy Dunlap
0 siblings, 1 reply; 4+ messages in thread
From: KernelCI bot @ 2025-10-14 13:59 UTC (permalink / raw)
To: kernelci-results; +Cc: regressions, gus, linux-next
Hello,
New build issue found on next/master:
---
undefined reference to `devm_backlight_device_register' in vmlinux.unstripped (drivers/gpu/drm/panel/panel-visionox-rm69299.c) [logspec:kbuild,kbuild.compiler.linker_error]
---
- dashboard: https://d.kernelci.org/i/maestro:c1e01dcc5d8b9be9ec47f44bbdb346c2464c0f02
- giturl: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
- commit HEAD: 13863a59e410cab46d26751941980dc8f088b9b3
- tags: next-20251014
Log excerpt:
=====================================================
LD .tmp_vmlinux1
aarch64-linux-gnu-ld: Unexpected GOT/PLT entries detected!
aarch64-linux-gnu-ld: Unexpected run-time procedure linkages detected!
aarch64-linux-gnu-ld: drivers/gpu/drm/panel/panel-visionox-rm69299.o: in function `visionox_rm69299_create_backlight':
/tmp/kci/linux/drivers/gpu/drm/panel/panel-visionox-rm69299.c:343: undefined reference to `devm_backlight_device_register'
=====================================================
# Builds where the incident occurred:
## defconfig+arm64-chromebook+CONFIG_ARM64_16K_PAGES=y on (arm64):
- compiler: gcc-12
- config: https://files.kernelci.org/kbuild-gcc-12-arm64-16k_pages-68ee4f14a6dc7c71db9fda21/.config
- dashboard: https://d.kernelci.org/build/maestro:68ee4f14a6dc7c71db9fda21
## defconfig+arm64-chromebook+CONFIG_ARM64_64K_PAGES=y on (arm64):
- compiler: gcc-12
- config: https://files.kernelci.org/kbuild-gcc-12-arm64-64k_pages-68ee4f17a6dc7c71db9fda24/.config
- dashboard: https://d.kernelci.org/build/maestro:68ee4f17a6dc7c71db9fda24
## defconfig+arm64-chromebook+CONFIG_CPU_BIG_ENDIAN=y+debug+kselftest+tinyconfig on (arm64):
- compiler: gcc-12
- config: https://files.kernelci.org/kbuild-gcc-12-arm64-mainline-big_endian-68ee4f32a6dc7c71db9fda39/.config
- dashboard: https://d.kernelci.org/build/maestro:68ee4f32a6dc7c71db9fda39
## defconfig+arm64-chromebook+CONFIG_RANDOMIZE_BASE=y on (arm64):
- compiler: gcc-12
- config: https://files.kernelci.org/kbuild-gcc-12-arm64-randomize-68ee4f1fa6dc7c71db9fda2a/.config
- dashboard: https://d.kernelci.org/build/maestro:68ee4f1fa6dc7c71db9fda2a
## defconfig+arm64-chromebook+kcidebug+lab-setup on (arm64):
- compiler: gcc-12
- config: https://files.kernelci.org/kbuild-gcc-12-arm64-chromebook-kcidebug-68ee4f2ba6dc7c71db9fda33/.config
- dashboard: https://d.kernelci.org/build/maestro:68ee4f2ba6dc7c71db9fda33
## defconfig+arm64-chromebook+kselftest on (arm64):
- compiler: gcc-12
- config: https://files.kernelci.org/kbuild-gcc-12-arm64-kselftest-16k_pages-68ee4f23a6dc7c71db9fda2d/.config
- dashboard: https://d.kernelci.org/build/maestro:68ee4f23a6dc7c71db9fda2d
## defconfig+arm64-chromebook+preempt_rt on (arm64):
- compiler: gcc-12
- config: https://files.kernelci.org/kbuild-gcc-12-arm64-preempt_rt_chromebook-68ee4f3aa6dc7c71db9fda3f/.config
- dashboard: https://d.kernelci.org/build/maestro:68ee4f3aa6dc7c71db9fda3f
#kernelci issue maestro:c1e01dcc5d8b9be9ec47f44bbdb346c2464c0f02
Reported-by: kernelci.org bot <bot@kernelci•org>
--
This is an experimental report format. Please send feedback in!
Talk to us at kernelci@lists•linux.dev
Made with love by the KernelCI team - https://kernelci.org
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [REGRESSION] next/master: (build) undefined reference to `devm_backlight_device_register' in vmlinux...
2025-10-14 13:59 [REGRESSION] next/master: (build) undefined reference to `devm_backlight_device_register' in vmlinux KernelCI bot
@ 2025-10-16 3:47 ` Randy Dunlap
2025-10-16 9:59 ` Gustavo Padovan
0 siblings, 1 reply; 4+ messages in thread
From: Randy Dunlap @ 2025-10-16 3:47 UTC (permalink / raw)
To: kernelci, kernelci-results, Guido Günther, Neil Armstrong,
dri-devel, phone-devel
Cc: regressions, gus, linux-next
Guido,
Looks like this driver needs
+ depends on BACKLIGHT_CLASS_DEVICE
to fix the build.
@Gus- please read comments near bottom/end.
On 10/14/25 6:59 AM, KernelCI bot wrote:
>
>
>
>
> Hello,
>
> New build issue found on next/master:
>
> ---
> undefined reference to `devm_backlight_device_register' in vmlinux.unstripped (drivers/gpu/drm/panel/panel-visionox-rm69299.c) [logspec:kbuild,kbuild.compiler.linker_error]
> ---
>
> - dashboard: https://d.kernelci.org/i/maestro:c1e01dcc5d8b9be9ec47f44bbdb346c2464c0f02
> - giturl: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> - commit HEAD: 13863a59e410cab46d26751941980dc8f088b9b3
> - tags: next-20251014
>
>
> Log excerpt:
> =====================================================
> LD .tmp_vmlinux1
> aarch64-linux-gnu-ld: Unexpected GOT/PLT entries detected!
> aarch64-linux-gnu-ld: Unexpected run-time procedure linkages detected!
> aarch64-linux-gnu-ld: drivers/gpu/drm/panel/panel-visionox-rm69299.o: in function `visionox_rm69299_create_backlight':
> /tmp/kci/linux/drivers/gpu/drm/panel/panel-visionox-rm69299.c:343: undefined reference to `devm_backlight_device_register'
>
> =====================================================
>
>
> # Builds where the incident occurred:
>
> ## defconfig+arm64-chromebook+CONFIG_ARM64_16K_PAGES=y on (arm64):
> - compiler: gcc-12
> - config: https://files.kernelci.org/kbuild-gcc-12-arm64-16k_pages-68ee4f14a6dc7c71db9fda21/.config
> - dashboard: https://d.kernelci.org/build/maestro:68ee4f14a6dc7c71db9fda21
>
> ## defconfig+arm64-chromebook+CONFIG_ARM64_64K_PAGES=y on (arm64):
> - compiler: gcc-12
> - config: https://files.kernelci.org/kbuild-gcc-12-arm64-64k_pages-68ee4f17a6dc7c71db9fda24/.config
> - dashboard: https://d.kernelci.org/build/maestro:68ee4f17a6dc7c71db9fda24
>
> ## defconfig+arm64-chromebook+CONFIG_CPU_BIG_ENDIAN=y+debug+kselftest+tinyconfig on (arm64):
> - compiler: gcc-12
> - config: https://files.kernelci.org/kbuild-gcc-12-arm64-mainline-big_endian-68ee4f32a6dc7c71db9fda39/.config
> - dashboard: https://d.kernelci.org/build/maestro:68ee4f32a6dc7c71db9fda39
>
> ## defconfig+arm64-chromebook+CONFIG_RANDOMIZE_BASE=y on (arm64):
> - compiler: gcc-12
> - config: https://files.kernelci.org/kbuild-gcc-12-arm64-randomize-68ee4f1fa6dc7c71db9fda2a/.config
> - dashboard: https://d.kernelci.org/build/maestro:68ee4f1fa6dc7c71db9fda2a
>
> ## defconfig+arm64-chromebook+kcidebug+lab-setup on (arm64):
> - compiler: gcc-12
> - config: https://files.kernelci.org/kbuild-gcc-12-arm64-chromebook-kcidebug-68ee4f2ba6dc7c71db9fda33/.config
> - dashboard: https://d.kernelci.org/build/maestro:68ee4f2ba6dc7c71db9fda33
>
> ## defconfig+arm64-chromebook+kselftest on (arm64):
> - compiler: gcc-12
> - config: https://files.kernelci.org/kbuild-gcc-12-arm64-kselftest-16k_pages-68ee4f23a6dc7c71db9fda2d/.config
> - dashboard: https://d.kernelci.org/build/maestro:68ee4f23a6dc7c71db9fda2d
>
> ## defconfig+arm64-chromebook+preempt_rt on (arm64):
> - compiler: gcc-12
> - config: https://files.kernelci.org/kbuild-gcc-12-arm64-preempt_rt_chromebook-68ee4f3aa6dc7c71db9fda3f/.config
> - dashboard: https://d.kernelci.org/build/maestro:68ee4f3aa6dc7c71db9fda3f
>
>
> #kernelci issue maestro:c1e01dcc5d8b9be9ec47f44bbdb346c2464c0f02
>
> Reported-by: kernelci.org bot <bot@kernelci•org>
>
> --
> This is an experimental report format. Please send feedback in!
> Talk to us at kernelci@lists•linux.dev
>
> Made with love by the KernelCI team - https://kernelci.org
>
Gus, the CI reporter needs to learn how to do a few things because developers
(other than me ?) don't scrounge mailing lists to look for problems.
a. find the commit that caused the problem (or the email series)
b. send the report (Cc:) to whoever wrote the patch and to the
appropriate mailing list.
I expect that b. is easier than a., so do it first.
And I'm sure that I have missed a thing or two that could be
added as well.
Thanks.
--
~Randy
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [REGRESSION] next/master: (build) undefined reference to `devm_backlight_device_register' in vmlinux...
2025-10-16 3:47 ` Randy Dunlap
@ 2025-10-16 9:59 ` Gustavo Padovan
2025-10-17 23:23 ` Randy Dunlap
0 siblings, 1 reply; 4+ messages in thread
From: Gustavo Padovan @ 2025-10-16 9:59 UTC (permalink / raw)
To: Randy Dunlap
Cc: kernelci, kernelci-results, "Guido Günther",
Neil Armstrong, dri-devel, phone-devel, regressions, linux-next
Hi Randy,
---- On Thu, 16 Oct 2025 00:47:35 -0300 Randy Dunlap <rdunlap@infradead•org> wrote ---
> Guido,
>
> Looks like this driver needs
>
> + depends on BACKLIGHT_CLASS_DEVICE
>
> to fix the build.
>
> @Gus- please read comments near bottom/end.
>
>
> On 10/14/25 6:59 AM, KernelCI bot wrote:
> >
> >
> >
> >
> > Hello,
> >
> > New build issue found on next/master:
> >
> > ---
> > undefined reference to `devm_backlight_device_register' in vmlinux.unstripped (drivers/gpu/drm/panel/panel-visionox-rm69299.c) [logspec:kbuild,kbuild.compiler.linker_error]
> > ---
> >
> > - dashboard: https://d.kernelci.org/i/maestro:c1e01dcc5d8b9be9ec47f44bbdb346c2464c0f02
> > - giturl: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> > - commit HEAD: 13863a59e410cab46d26751941980dc8f088b9b3
> > - tags: next-20251014
> >
> >
> > Log excerpt:
> > =====================================================
> > LD .tmp_vmlinux1
> > aarch64-linux-gnu-ld: Unexpected GOT/PLT entries detected!
> > aarch64-linux-gnu-ld: Unexpected run-time procedure linkages detected!
> > aarch64-linux-gnu-ld: drivers/gpu/drm/panel/panel-visionox-rm69299.o: in function `visionox_rm69299_create_backlight':
> > /tmp/kci/linux/drivers/gpu/drm/panel/panel-visionox-rm69299.c:343: undefined reference to `devm_backlight_device_register'
> >
> > =====================================================
> >
> >
> > # Builds where the incident occurred:
> >
> > ## defconfig+arm64-chromebook+CONFIG_ARM64_16K_PAGES=y on (arm64):
> > - compiler: gcc-12
> > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-16k_pages-68ee4f14a6dc7c71db9fda21/.config
> > - dashboard: https://d.kernelci.org/build/maestro:68ee4f14a6dc7c71db9fda21
> >
> > ## defconfig+arm64-chromebook+CONFIG_ARM64_64K_PAGES=y on (arm64):
> > - compiler: gcc-12
> > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-64k_pages-68ee4f17a6dc7c71db9fda24/.config
> > - dashboard: https://d.kernelci.org/build/maestro:68ee4f17a6dc7c71db9fda24
> >
> > ## defconfig+arm64-chromebook+CONFIG_CPU_BIG_ENDIAN=y+debug+kselftest+tinyconfig on (arm64):
> > - compiler: gcc-12
> > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-mainline-big_endian-68ee4f32a6dc7c71db9fda39/.config
> > - dashboard: https://d.kernelci.org/build/maestro:68ee4f32a6dc7c71db9fda39
> >
> > ## defconfig+arm64-chromebook+CONFIG_RANDOMIZE_BASE=y on (arm64):
> > - compiler: gcc-12
> > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-randomize-68ee4f1fa6dc7c71db9fda2a/.config
> > - dashboard: https://d.kernelci.org/build/maestro:68ee4f1fa6dc7c71db9fda2a
> >
> > ## defconfig+arm64-chromebook+kcidebug+lab-setup on (arm64):
> > - compiler: gcc-12
> > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-chromebook-kcidebug-68ee4f2ba6dc7c71db9fda33/.config
> > - dashboard: https://d.kernelci.org/build/maestro:68ee4f2ba6dc7c71db9fda33
> >
> > ## defconfig+arm64-chromebook+kselftest on (arm64):
> > - compiler: gcc-12
> > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-kselftest-16k_pages-68ee4f23a6dc7c71db9fda2d/.config
> > - dashboard: https://d.kernelci.org/build/maestro:68ee4f23a6dc7c71db9fda2d
> >
> > ## defconfig+arm64-chromebook+preempt_rt on (arm64):
> > - compiler: gcc-12
> > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-preempt_rt_chromebook-68ee4f3aa6dc7c71db9fda3f/.config
> > - dashboard: https://d.kernelci.org/build/maestro:68ee4f3aa6dc7c71db9fda3f
> >
> >
> > #kernelci issue maestro:c1e01dcc5d8b9be9ec47f44bbdb346c2464c0f02
> >
> > Reported-by: kernelci.org bot <bot@kernelci•org>
> >
> > --
> > This is an experimental report format. Please send feedback in!
> > Talk to us at kernelci@lists•linux.dev
> >
> > Made with love by the KernelCI team - https://kernelci.org
> >
>
> Gus, the CI reporter needs to learn how to do a few things because developers
> (other than me ?) don't scrounge mailing lists to look for problems.
Absolutely. Our goal is to automate as many steps as possible!
> a. find the commit that caused the problem (or the email series)
>
> b. send the report (Cc:) to whoever wrote the patch and to the
> appropriate mailing list.
>
> I expect that b. is easier than a., so do it first.
b. is easier that a. yes, but I don't think we can do it first because we
need to figure the patch first. Essentially, you are asking us for
build bisections. Something that is already on our roadmap, but
we didn't had the time to tackle yet, but should come to it in the
coming months.
>
> And I'm sure that I have missed a thing or two that could be
> added as well.
Please keep the feedback coming!
Best,
- Gus
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [REGRESSION] next/master: (build) undefined reference to `devm_backlight_device_register' in vmlinux...
2025-10-16 9:59 ` Gustavo Padovan
@ 2025-10-17 23:23 ` Randy Dunlap
0 siblings, 0 replies; 4+ messages in thread
From: Randy Dunlap @ 2025-10-17 23:23 UTC (permalink / raw)
To: Gustavo Padovan
Cc: kernelci, kernelci-results, Guido Günther, Neil Armstrong,
dri-devel, phone-devel, regressions, linux-next
On 10/16/25 2:59 AM, Gustavo Padovan wrote:
> Hi Randy,
>
>
> ---- On Thu, 16 Oct 2025 00:47:35 -0300 Randy Dunlap <rdunlap@infradead•org> wrote ---
>
> > Guido,
> >
> > Looks like this driver needs
> >
> > + depends on BACKLIGHT_CLASS_DEVICE
> >
> > to fix the build.
> >
> > @Gus- please read comments near bottom/end.
> >
> >
> > On 10/14/25 6:59 AM, KernelCI bot wrote:
> > >
> > >
> > >
> > >
> > > Hello,
> > >
> > > New build issue found on next/master:
> > >
> > > ---
> > > undefined reference to `devm_backlight_device_register' in vmlinux.unstripped (drivers/gpu/drm/panel/panel-visionox-rm69299.c) [logspec:kbuild,kbuild.compiler.linker_error]
> > > ---
> > >
> > > - dashboard: https://d.kernelci.org/i/maestro:c1e01dcc5d8b9be9ec47f44bbdb346c2464c0f02
> > > - giturl: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> > > - commit HEAD: 13863a59e410cab46d26751941980dc8f088b9b3
> > > - tags: next-20251014
> > >
> > >
> > > Log excerpt:
> > > =====================================================
> > > LD .tmp_vmlinux1
> > > aarch64-linux-gnu-ld: Unexpected GOT/PLT entries detected!
> > > aarch64-linux-gnu-ld: Unexpected run-time procedure linkages detected!
> > > aarch64-linux-gnu-ld: drivers/gpu/drm/panel/panel-visionox-rm69299.o: in function `visionox_rm69299_create_backlight':
> > > /tmp/kci/linux/drivers/gpu/drm/panel/panel-visionox-rm69299.c:343: undefined reference to `devm_backlight_device_register'
> > >
> > > =====================================================
> > >
> > >
> > > # Builds where the incident occurred:
> > >
> > > ## defconfig+arm64-chromebook+CONFIG_ARM64_16K_PAGES=y on (arm64):
> > > - compiler: gcc-12
> > > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-16k_pages-68ee4f14a6dc7c71db9fda21/.config
> > > - dashboard: https://d.kernelci.org/build/maestro:68ee4f14a6dc7c71db9fda21
> > >
> > > ## defconfig+arm64-chromebook+CONFIG_ARM64_64K_PAGES=y on (arm64):
> > > - compiler: gcc-12
> > > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-64k_pages-68ee4f17a6dc7c71db9fda24/.config
> > > - dashboard: https://d.kernelci.org/build/maestro:68ee4f17a6dc7c71db9fda24
> > >
> > > ## defconfig+arm64-chromebook+CONFIG_CPU_BIG_ENDIAN=y+debug+kselftest+tinyconfig on (arm64):
> > > - compiler: gcc-12
> > > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-mainline-big_endian-68ee4f32a6dc7c71db9fda39/.config
> > > - dashboard: https://d.kernelci.org/build/maestro:68ee4f32a6dc7c71db9fda39
> > >
> > > ## defconfig+arm64-chromebook+CONFIG_RANDOMIZE_BASE=y on (arm64):
> > > - compiler: gcc-12
> > > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-randomize-68ee4f1fa6dc7c71db9fda2a/.config
> > > - dashboard: https://d.kernelci.org/build/maestro:68ee4f1fa6dc7c71db9fda2a
> > >
> > > ## defconfig+arm64-chromebook+kcidebug+lab-setup on (arm64):
> > > - compiler: gcc-12
> > > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-chromebook-kcidebug-68ee4f2ba6dc7c71db9fda33/.config
> > > - dashboard: https://d.kernelci.org/build/maestro:68ee4f2ba6dc7c71db9fda33
> > >
> > > ## defconfig+arm64-chromebook+kselftest on (arm64):
> > > - compiler: gcc-12
> > > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-kselftest-16k_pages-68ee4f23a6dc7c71db9fda2d/.config
> > > - dashboard: https://d.kernelci.org/build/maestro:68ee4f23a6dc7c71db9fda2d
> > >
> > > ## defconfig+arm64-chromebook+preempt_rt on (arm64):
> > > - compiler: gcc-12
> > > - config: https://files.kernelci.org/kbuild-gcc-12-arm64-preempt_rt_chromebook-68ee4f3aa6dc7c71db9fda3f/.config
> > > - dashboard: https://d.kernelci.org/build/maestro:68ee4f3aa6dc7c71db9fda3f
> > >
> > >
> > > #kernelci issue maestro:c1e01dcc5d8b9be9ec47f44bbdb346c2464c0f02
> > >
> > > Reported-by: kernelci.org bot <bot@kernelci•org>
> > >
> > > --
> > > This is an experimental report format. Please send feedback in!
> > > Talk to us at kernelci@lists•linux.dev
> > >
> > > Made with love by the KernelCI team - https://kernelci.org
> > >
> >
> > Gus, the CI reporter needs to learn how to do a few things because developers
> > (other than me ?) don't scrounge mailing lists to look for problems.
>
> Absolutely. Our goal is to automate as many steps as possible!
>
> > a. find the commit that caused the problem (or the email series)
> >
> > b. send the report (Cc:) to whoever wrote the patch and to the
> > appropriate mailing list.
> >
> > I expect that b. is easier than a., so do it first.
>
> b. is easier that a. yes, but I don't think we can do it first because we
> need to figure the patch first. Essentially, you are asking us for
> build bisections. Something that is already on our roadmap, but
> we didn't had the time to tackle yet, but should come to it in the
> coming months.
Sometimes a bisect could be required. For cases such as this report,
a simple git blame or git log will show the culprit. Although coding
that is not as simple as a human looking at the screen.
> >
> > And I'm sure that I have missed a thing or two that could be
> > added as well.
>
> Please keep the feedback coming!
--
~Randy
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2025-10-17 23:23 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-10-14 13:59 [REGRESSION] next/master: (build) undefined reference to `devm_backlight_device_register' in vmlinux KernelCI bot
2025-10-16 3:47 ` Randy Dunlap
2025-10-16 9:59 ` Gustavo Padovan
2025-10-17 23:23 ` Randy Dunlap
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