linux-kernel - next-20250821: tinyconfig: kernel/panic.c error: implicit declaration of function 'panic_print_deprecated'; did you mean 'panic_print_set'? [-Werror=implicit-function-declaration]

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Message-ID: <CA+G9fYss3ztUGNvEu07Veck+09Lsied5TGbb-2fSw8H5wxRaJw@mail.gmail.com>
Date: Thu, 21 Aug 2025 16:38:34 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: open list <linux-kernel@...r.kernel.org>, lkft-triage@...ts.linaro.org, 
	Linux Regressions <regressions@...ts.linux.dev>
Cc: Petr Mladek <pmladek@...e.com>, Ingo Molnar <mingo@...nel.org>, 
	Steven Rostedt <rostedt@...dmis.org>, Dan Carpenter <dan.carpenter@...aro.org>, 
	Anders Roxell <anders.roxell@...aro.org>, Ben Copeland <benjamin.copeland@...aro.org>, 
	Arnd Bergmann <arnd@...db.de>
Subject: next-20250821: tinyconfig: kernel/panic.c error: implicit declaration
 of function 'panic_print_deprecated'; did you mean 'panic_print_set'? [-Werror=implicit-function-declaration]

The following build warnings / errors are noticed with arc, arm, arm64 defconfig
with clang-20 and gcc-12 toolchains.

Regression Analysis:
- New regression? yes
- Reproducibility? yes

Build regression: next-20250821 tinyconfig kernel panic.c error
implicit declaration of function 'panic_print_deprecated'; did you
mean 'panic_print_set'? [-Werror=implicit-function-declaration]

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

* arc, build
  - gcc-9-tinyconfig

* arm, build
  - clang-20-tinyconfig
  - clang-nightly-tinyconfig
  - gcc-13-tinyconfig
  - gcc-8-tinyconfig

* arm64, build
  - clang-20-tinyconfig
  - clang-nightly-tinyconfig
  - gcc-13-tinyconfig
  - gcc-8-tinyconfig

* parisc, build
  - gcc-11-tinyconfig

* powerpc, build
  - clang-20-tinyconfig
  - clang-nightly-tinyconfig
  - gcc-13-tinyconfig
  - gcc-8-tinyconfig

## Build log
kernel/panic.c: In function 'panic_print_set':
kernel/panic.c:954:9: error: implicit declaration of function
'panic_print_deprecated'; did you mean 'panic_print_set'?
[-Werror=implicit-function-declaration]
  954 |         panic_print_deprecated();
      |         ^~~~~~~~~~~~~~~~~~~~~~
      |         panic_print_set
cc1: some warnings being treated as errors

## Source
* Kernel version: 6.17.0-rc2
* Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git
* Git describe: next-20250821
* Git commit: 7fa4d8dc380fbd81a9d702a855c50690c9c6442c
* Architectures: arc arm arm64
* Toolchains: clang-20 gcc-12
* Kconfigs: defconfig

## Build
* Build log: https://qa-reports.linaro.org/api/testruns/29616870/log_file/
* Build details:
https://regressions.linaro.org/lkft/linux-next-master/next-20250821/build/clang-20-tinyconfig/
* Build plan: https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/builds/31aRY2vQ0cMol9wA63TKkoCPsxC
* Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/31aRY2vQ0cMol9wA63TKkoCPsxC/
* Kernel config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/31aRY2vQ0cMol9wA63TKkoCPsxC/config

--
Linaro LKFT
https://lkft.linaro.org