On Thu, Aug 25, 2022 at 12:48 PM Naresh Kamboju naresh.kamboju@linaro.org wrote:

The x86_64 and i386 clang builds failed due to these warnings / errors on Linux next-20220825.

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

kernel/smpboot.c:435:6: error: variable 'oldstate' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized] if (atomic_read(&per_cpu(cpu_hotplug_state, cpu)) == CPU_DEAD) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/smpboot.c:449:6: note: uninitialized use occurs here if (oldstate == CPU_DEAD) { ^~~~~~~~ kernel/smpboot.c:435:2: note: remove the 'if' if its condition is always false if (atomic_read(&per_cpu(cpu_hotplug_state, cpu)) == CPU_DEAD) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/smpboot.c:428:14: note: initialize the variable 'oldstate' to silence this warning int oldstate; ^ = 0 1 error generated. make[2]: *** [scripts/Makefile.build:250: kernel/smpboot.o] Error 1

Build link: https://builds.tuxbuild.com/2Dpvef6uVvzHMztbfQRmxJfPXZT/

Please see

https://lore.kernel.org/lkml/CAFULd4bgdGosQ3byMW9S+ov0uDO9iK3jCmZ-fkZQbCGOpf...

for the fix.

Uros.

Steps to reproduce:

# To install tuxmake on your system globally: # sudo pip3 install -U tuxmake

tuxmake --runtime podman --target-arch x86_64 --toolchain clang-14 --kconfig https://builds.tuxbuild.com/2Dpvef6uVvzHMztbfQRmxJfPXZT/config LLVM=1 LLVM_IAS=1

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