reproduce (this is a W=1 build):
        # https://github.com/linux-chenxing/linux/commit/b4e750e9c28b84519ef454234db2feb4664b72af
        git remote add chenxing https://github.com/linux-chenxing/linux.git
        git fetch --no-tags chenxing mstar_v6_5_reorder
        git checkout b4e750e9c28b84519ef454234db2feb4664b72af

        # install powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-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=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/clk/mstar/