reproduce (this is a W=1 build):
        # https://github.com/esmil/linux/commit/dcb5a245dbe2203ae35f6b1b5cb28929f758008c
        git remote add esmil https://github.com/esmil/linux
        git fetch --no-tags esmil visionfive
        git checkout dcb5a245dbe2203ae35f6b1b5cb28929f758008c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash