reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/spacemit-com/linux/commit/bab8dea259100a99e047fd11a48940b229d30031
        git remote add spacemit https://github.com/spacemit-com/linux
        git fetch --no-tags spacemit k1/for-next
        git checkout bab8dea259100a99e047fd11a48940b229d30031
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.3.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.3.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash dtbs_check