reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/qais-yousef/linux/commit/795964ba3482de02426331d23c50241a1d20898b
        git remote add qais-yousef https://github.com/qais-yousef/linux
        git fetch --no-tags qais-yousef uclamp-misfit-update
        git checkout 795964ba3482de02426331d23c50241a1d20898b
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash kernel/sched/