linux-kernel - x86: clang: acpi-cpufreq.c:970:24: error: variable 'ret' is uninitialized when used here [-Werror,-Wuninitialized]

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Message-ID: <CA+G9fYtaNmXOKnwH_ih9vZyFeaD+Lvzxf3WTbAV50rBtwkPxpQ@mail.gmail.com>
Date:   Thu, 10 Nov 2022 16:44:09 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     open list <linux-kernel@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        lkft-triage@...ts.linaro.org, llvm@...ts.linux.dev
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Linux PM <linux-pm@...r.kernel.org>,
        Nathan Chancellor <nathan@...nel.org>
Subject: x86: clang: acpi-cpufreq.c:970:24: error: variable 'ret' is
 uninitialized when used here [-Werror,-Wuninitialized]

[Please ignore email this if it is already reported]

Kernel build warning noticed on x86_64 with clang toolchain [1].
Build failures noticed from next-20221108 .. next-20221110.

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

make --silent --keep-going --jobs=8
O=/home/tuxbuild/.cache/tuxmake/builds/1/build LLVM=1 LLVM_IAS=1
ARCH=x86_64 SRCARCH=x86 CROSS_COMPILE=x86_64-linux-gnu- HOSTCC=clang
CC=clang
drivers/cpufreq/acpi-cpufreq.c:970:24: error: variable 'ret' is
uninitialized when used here [-Werror,-Wuninitialized]
        acpi_cpufreq_online = ret;
                              ^~~
drivers/cpufreq/acpi-cpufreq.c:960:9: note: initialize the variable
'ret' to silence this warning
        int ret;
               ^
                = 0
1 error generated.

tuxmake --runtime podman --target-arch x86_64 --toolchain
clang-nightly --kconfig defconfig --kconfig-add
https://raw.githubusercontent.com/Linaro/meta-lkft/kirkstone/meta/recipes-kernel/linux/files/lkft.config
--kconfig-add https://raw.githubusercontent.com/Linaro/meta-lkft/kirkstone/meta/recipes-kernel/linux/files/lkft-crypto.config
--kconfig-add https://raw.githubusercontent.com/Linaro/meta-lkft/kirkstone/meta/recipes-kernel/linux/files/distro-overrides.config
--kconfig-add https://raw.githubusercontent.com/Linaro/meta-lkft/kirkstone/meta/recipes-kernel/linux/files/systemd.config
--kconfig-add https://raw.githubusercontent.com/Linaro/meta-lkft/kirkstone/meta/recipes-kernel/linux/files/virtio.config
--kconfig-add CONFIG_IGB=y --kconfig-add
CONFIG_UNWINDER_FRAME_POINTER=y LLVM=1 LLVM_IAS=1



Build log:
[1] https://builds.tuxbuild.com/2HLg3VgMgxRXBn31n6Ig7BFwSy9/


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