Hi Michael, [auto build test ERROR on vfio/next] [also build test ERROR on v4.8-rc4 next-20160825] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] [Suggest to use git(>=2.9.0) format-patch --base= (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on] [Check https://git-scm.com/docs/git-format-patch for more information] url: https://github.com/0day-ci/linux/commits/Michael-S-Tsirkin/vfio-blacklist-legacy-virtio-devices/20160830-124010 base: https://github.com/awilliam/linux-vfio.git next config: x86_64-rhel (attached as .config) compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All errors (new ones prefixed by >>): >> ERROR: "vfio_is_noiommu_group_dev" [drivers/vfio/pci/vfio-pci.ko] undefined! --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation