reproduce (this is a W=1 build):
        # https://github.com/bytedance/kernel/commit/c29bfa28e97ff02afd20b21fd89eb5e945a575d9
        git remote add bytedance https://github.com/bytedance/kernel.git
        git fetch --no-tags bytedance 5.15-velinux
        git checkout c29bfa28e97ff02afd20b21fd89eb5e945a575d9
        # 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 mm/