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From:   Naresh Kamboju <naresh.kamboju@linaro.org>
Date:   Mon, 19 Jun 2023 14:46:12 +0530
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Subject: next: arch/powerpc/kernel/stacktrace.c:171:9: error: implicit
 declaration of function 'nmi_cpu_backtrace'
To:     linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
        open list <linux-kernel@vger.kernel.org>,
        Linux-Next Mailing List <linux-next@vger.kernel.org>,
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Cc:     Nicholas Piggin <npiggin@gmail.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Arnd Bergmann <arnd@arndb.de>,
        Anders Roxell <anders.roxell@linaro.org>
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Following build regressions noticed on Linux next-20230619.

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


Regressions found on powerpc:

 - build/clang-nightly-maple_defconfig
 - build/gcc-8-maple_defconfig
 - build/gcc-12-maple_defconfig
 - build/clang-nightly-cell_defconfig
 - build/gcc-12-cell_defconfig
 - build/gcc-8-cell_defconfig
 - build/clang-16-cell_defconfig
 - build/clang-16-maple_defconfig

Build log:
arch/powerpc/kernel/stacktrace.c: In function 'handle_backtrace_ipi':
arch/powerpc/kernel/stacktrace.c:171:9: error: implicit declaration of
function 'nmi_cpu_backtrace' [-Werror=implicit-function-declaration]
  171 |         nmi_cpu_backtrace(regs);
      |         ^~~~~~~~~~~~~~~~~
arch/powerpc/kernel/stacktrace.c: In function 'arch_trigger_cpumask_backtrace':
arch/powerpc/kernel/stacktrace.c:226:9: error: implicit declaration of
function 'nmi_trigger_cpumask_backtrace'; did you mean
'arch_trigger_cpumask_backtrace'?
[-Werror=implicit-function-declaration]
  226 |         nmi_trigger_cpumask_backtrace(mask, exclude_self,
raise_backtrace_ipi);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |         arch_trigger_cpumask_backtrace
cc1: all warnings being treated as errors


Links:
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230619/testrun/17629288/suite/build/test/gcc-12-cell_defconfig/log
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230619/testrun/17629288/suite/build/test/gcc-12-cell_defconfig/history/
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230619/testrun/17629288/suite/build/test/gcc-12-cell_defconfig/details/

Steps to reproduce:
# To install tuxmake to your home directory at ~/.local/bin:
# pip3 install -U --user tuxmake
#
# Or install a deb/rpm depending on the running distribution
# See https://tuxmake.org/install-deb/ or
# https://tuxmake.org/install-rpm/
#
# See https://docs.tuxmake.org/ for complete documentation.


tuxmake --runtime podman --target-arch powerpc --toolchain gcc-12
--kconfig cell_defconfig

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