linux-kernel - Re: next-20251027: s390: pf1550-onkey.c:154:12: error: 'pf1550_onkey_resume' defined but not used [-Werror=unused-function]

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Message-ID: <CA+G9fYvzg-shL5LMmdJjJEGi6NvxHFdwbC5jQwtbFxkOFPnc4A@mail.gmail.com>
Date: Mon, 27 Oct 2025 18:42:53 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: Samuel Kayode <samuel.kayode@...oirfairelinux.com>, linux-s390@...r.kernel.org, 
	open list <linux-kernel@...r.kernel.org>, lkft-triage@...ts.linaro.org, 
	Linux Regressions <regressions@...ts.linux.dev>
Cc: Anders Roxell <anders.roxell@...aro.org>, Arnd Bergmann <arnd@...db.de>, 
	Dan Carpenter <dan.carpenter@...aro.org>, Ben Copeland <benjamin.copeland@...aro.org>, 
	Dmitry Torokhov <dmitry.torokhov@...il.com>, Frank Li <Frank.Li@....com>, 
	Sean Nyekjaer <sean@...nix.com>, Lee Jones <lee@...nel.org>, Heiko Carstens <hca@...ux.ibm.com>
Subject: Re: next-20251027: s390: pf1550-onkey.c:154:12: error:
 'pf1550_onkey_resume' defined but not used [-Werror=unused-function]

On Mon, 27 Oct 2025 at 14:26, Naresh Kamboju <naresh.kamboju@...aro.org> wrote:
>
> The following S390 allyesconfig build regressions noticed on the
> Linux next-20251027 tag with gcc-14.
>
> * S390, build
>   - gcc-14-allyesconfig
>
> First seen on next-20251027
> Good: next-20251024
> Bad: next-20251027
>
> Regression Analysis:
> - New regression? yes
> - Reproducibility? yes
>
> Build regression: next-20251027: pf1550-onkey.c:154:12: error:
> 'pf1550_onkey_resume' defined but not used [-Werror=unused-function]
>
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

Anders bisected this down to,
  9acb215cbebd ("Input: pf1550 - add onkey support")

>
> ## Build error
> drivers/input/misc/pf1550-onkey.c:154:12: error: 'pf1550_onkey_resume'
> defined but not used [-Werror=unused-function]
>   154 | static int pf1550_onkey_resume(struct device *dev)
>       |            ^~~~~~~~~~~~~~~~~~~
> drivers/input/misc/pf1550-onkey.c:133:12: error:
> 'pf1550_onkey_suspend' defined but not used [-Werror=unused-function]
>   133 | static int pf1550_onkey_suspend(struct device *dev)
>       |            ^~~~~~~~~~~~~~~~~~~~
> cc1: all warnings being treated as errors
> make[6]: *** [/builds/linux/scripts/Makefile.build:287:
> drivers/input/misc/pf1550-onkey.o] Error 1
>
>
> ## Source
> * Kernel version: 6.18.0-rc2-next-20251027
> * Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git
> * Git describe: next-20251027
> * Git commit: 8fec172c82c2b5f6f8e47ab837c1dc91ee3d1b87
> * Architectures: S390
> * Toolchains: gcc-14
> * Kconfigs: allyesconfig
>
> ## Build
> * Test log:  https://storage.tuxsuite.com/public/linaro/lkft/builds/34dKrowtK5wNPnem1T5LSEjjq5o/build.log
> * Test details:
> https://regressions.linaro.org/lkft/linux-next-master/next-20251027/log-parser-build-kernel/gcc-compiler-_drivers_input_misc_pf-onkey_c_error_pf_onkey_resume_defined_but_not_used/
> * Build plan: https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/builds/34dKrowtK5wNPnem1T5LSEjjq5o
> * Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/34dKrowtK5wNPnem1T5LSEjjq5o/
> * Kernel config:
> https://storage.tuxsuite.com/public/linaro/lkft/builds/34dKrowtK5wNPnem1T5LSEjjq5o/config
>
> --
> Linaro LKFT