reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        git remote add driver-core https://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core.git
        git fetch driver-core driver-core-next
        git checkout driver-core/driver-core-next
        b4 shazam https://lore.kernel.org/r/20250628040956.2181-2-work@onurozkan.dev
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 prepare