reproduce (this is a W=1 build):
        # https://github.com/brauner/linux/commit/309de0163ea00ffb59634ebc4e538655cde0c21e
        git remote add brauner-github https://github.com/brauner/linux.git
        git fetch --no-tags brauner-github work.namespace.ns_common
        git checkout 309de0163ea00ffb59634ebc4e538655cde0c21e
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # 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 SHELL=/bin/bash kernel/