Hi Ajay, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on iommu/next] [also build test ERROR on linux/master soc/for-next linus/master v5.8 next-20200810] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Ajay-Kumar/dma-iommu-allow-devic... base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next config: i386-randconfig-a004-20200810 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/intel-iommu.h:19, from drivers/gpu/drm/i915/i915_drv.h:41, from drivers/gpu/drm/i915/display/intel_display_types.h:45, from <command-line>: 832 | static int iommu_group_device_count_from_dev(struct device *dev) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/intel-iommu.h:14, from drivers/gpu/drm/i915/i915_drv.h:41, from drivers/gpu/drm/i915/display/intel_display_types.h:45, from <command-line>: include/linux/iova.h:275:12: error: 'iommu_set_iova_range' defined but not used [-Werror=unused-function] 275 | static int iommu_set_iova_range(struct device *dev, dma_addr_t base, u64 size) | ^~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors -- In file included from include/linux/vfio.h:12, from drivers/gpu/drm/i915/gvt/dmabuf.h:33, from <command-line>: 832 | static int iommu_group_device_count_from_dev(struct device *dev) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors vim +/iommu_group_device_count_from_dev +832 include/linux/iommu.h 831 833 { 834 return 0; 835 } 836 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org