reproduce (this is a W=1 build):
        # https://github.com/xinli-intel/linux-fred-public/commit/a0cabfa58f8dd9676bcc378ca8d5a77ea2eb751c
        git remote add xinli-intel-fred-public https://github.com/xinli-intel/linux-fred-public.git
        git fetch --no-tags xinli-intel-fred-public fix_sp_calculation
        git checkout a0cabfa58f8dd9676bcc378ca8d5a77ea2eb751c
        # save the config file
        make W=1 ARCH=i386 olddefconfig
        make W=1 ARCH=i386