reproduce (this is a W=1 build):
        # https://github.com/bytedance/kernel/commit/7fd72e0ffe7119a2c76785aa88ca99a3e9557ceb
        git remote add bytedance https://github.com/bytedance/kernel.git
        git fetch --no-tags bytedance 5.15-velinux
        git checkout 7fd72e0ffe7119a2c76785aa88ca99a3e9557ceb
        # 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