reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?id=6c41b23d5f57f306c940c65a2a5240bc20a95659
        git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
        git fetch --no-tags akpm-mm mm-new
        git checkout 6c41b23d5f57f306c940c65a2a5240bc20a95659

        # save the config file
        make W=1 ARCH=x86_64 olddefconfig
        make W=1 headers_install
        make W=1 -C tools/thermal/lib
        make W=1 -C tools/lib/api
        make W=1 tools/all