reproduce (this is a W=1 build):
        # https://github.com/spacemit-com/linux/commit/b1fb26544ee5aad9f116599e72a5625591799eba
        git remote add spacemit-com https://github.com/spacemit-com/linux
        git fetch --no-tags spacemit-com wip/k3-pm-v2
        git checkout b1fb26544ee5aad9f116599e72a5625591799eba

        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        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=$HOME/0day COMPILER=clang-18 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-18 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash dt_binding_check dtbs_check