reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/steev/linux/commit/e6aea2db083fdaa92d663258d1eb50d7eeaccfdf
        git remote add steev https://github.com/steev/linux
        git fetch --no-tags steev thinkpad-t14s-oled-6.16-rc7
        git checkout e6aea2db083fdaa92d663258d1eb50d7eeaccfdf
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-8.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-8.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash kernel/