reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=f06e31eef4c1496f2e1e6accd8d3764744742d92
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout f06e31eef4c1496f2e1e6accd8d3764744742d92

        # save the config file
        make W=1 ARCH=i386 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