linux-kernel - tinyconfig: kernel/time/timekeeping.c:286:1: error: no return statement in function returning non-void [-Werror=return-type]

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Date: Wed, 10 Apr 2024 16:26:12 +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: Thomas Gleixner <tglx@...utronix.de>, Adrian Hunter <adrian.hunter@...el.com>, 
	Stephen Boyd <sboyd@...nel.org>, John Stultz <jstultz@...gle.com>, Arnd Bergmann <arnd@...db.de>, 
	Dan Carpenter <dan.carpenter@...aro.org>, Anders Roxell <anders.roxell@...aro.org>
Subject: tinyconfig: kernel/time/timekeeping.c:286:1: error: no return
 statement in function returning non-void [-Werror=return-type]

The powerpc,s390, superSh and sparc tinyconfig builds failed due to
following build
warnings / errors on the Linux next-20240410 with gcc-13 and gcc-11.

List build failures:
---
* s390, build
  - gcc-13-tinyconfig - failed
  - gcc-8-tinyconfig - failed

* sh, build
  - gcc-11-tinyconfig - failed

* sparc, build
  - gcc-11-tinyconfig - failed

* mips, build
  - gcc-12-tinyconfig - failed
  - gcc-8-tinyconfig - failed

* powerpc, build
  - gcc-13-tinyconfig - failed
  - gcc-8-tinyconfig - failed

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

Build log:
--------
kernel/time/timekeeping.c: In function 'timekeeping_debug_get_ns':
kernel/time/timekeeping.c:286:1: error: no return statement in
function returning non-void [-Werror=return-type]
  286 | }
      | ^
cc1: some warnings being treated as errors

steps to reproduce:
---
# tuxmake --runtime podman --target-arch powerpc --toolchain gcc-13
--kconfig tinyconfig

Links:
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240410/testrun/23380322/suite/build/test/gcc-13-tinyconfig/details/
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240410/testrun/23380301/suite/build/test/gcc-11-tinyconfig/history/
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240410/testrun/23380301/suite/build/tests/

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