reproduce (this is a W=1 build):
        # https://github.com/xinli-intel/linux-fred-public/commit/ba4a099cdfb6456f5fae6fd235ce77659517af0e
        git remote add xinli-intel-fred-public https://github.com/xinli-intel/linux-fred-public.git
        git fetch --no-tags xinli-intel-fred-public fred-kvm-v7
        git checkout ba4a099cdfb6456f5fae6fd235ce77659517af0e
        # 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 arch/x86/kvm/