reproduce (this is a W=1 build):
        # https://github.com/jimc/linux/commit/7e96e1c95c0fa1af496e25ee9645927632dc4d32
        git remote add jimc https://github.com/jimc/linux.git
        git fetch --no-tags jimc ksyms-tune
        git checkout 7e96e1c95c0fa1af496e25ee9645927632dc4d32

        # 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