reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/awilliam/linux-vfio/commit/ec6c970f8374f91df0ebfe180cd388ba31187942
        git remote add awilliam-vfio https://github.com/awilliam/linux-vfio.git
        git fetch --no-tags awilliam-vfio vfio-address-space
        git checkout ec6c970f8374f91df0ebfe180cd388ba31187942
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash