reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux.git/commit/?id=2acbbc182e1fd364e022c713c7ac7365fb97a485
        git remote add thermal git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux.git
        git fetch --no-tags thermal thermal/threshold-patchset
        git checkout 2acbbc182e1fd364e022c713c7ac7365fb97a485
        # 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 SHELL=/bin/bash drivers/thermal/