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

From: "Arnd Bergmann" <[email-masked]>
Date: Thu, 10 Nov 2022 12:19:07 +0100

On Thu, Nov 10, 2022, at 12:14, Naresh Kamboju wrote:
> [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 <[email-masked]>
>
> 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.

This is caused by 13fdbc8b8da6 ("cpufreq: ACPI: Defer setting boost MSRs"),
which removes the initialization of this variable.

      Arnd