reproduce (this is a W=1 build):
        # https://github.com/esmil/linux/commit/2c60958976538fa12d5900b74825ad20ef644600
        git remote add esmil https://github.com/esmil/linux
        git fetch --no-tags esmil visionfive
        git checkout 2c60958976538fa12d5900b74825ad20ef644600
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash