reproduce (this is a W=1 build):
        # https://github.com/xinli-intel/linux-fred-public/commit/0a94caa1312b1b10fb9393fb0b983d3ebc03c483
        git remote add xinli-intel-fred-public https://github.com/xinli-intel/linux-fred-public.git
        git fetch --no-tags xinli-intel-fred-public rdpmc_cleanup
        git checkout 0a94caa1312b1b10fb9393fb0b983d3ebc03c483
        # 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 prepare