reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git/commit/?id=7b0ccabb873de4b4dec3214b2a0ee3c32c326101
        git remote add krzk https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git
        git fetch --no-tags krzk next/dt64
        git checkout 7b0ccabb873de4b4dec3214b2a0ee3c32c326101
        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=$HOME/0day COMPILER=gcc-9.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash dtbs_check