reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/mda/linux-next.git/commit/?id=756ed4bc4a527cdddc3f9f09240637ceb3408645
        git remote add mda-next https://git.kernel.org/pub/scm/linux/kernel/git/mda/linux-next.git
        git fetch --no-tags mda-next icssg-dev
        git checkout 756ed4bc4a527cdddc3f9f09240637ceb3408645

        # 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=$HOME/0day COMPILER=clang-16 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-16 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash