Hi Eric, Thank you for the patch! Yet something to improve: [auto build test ERROR on v5.12-rc6] [also build test ERROR on next-20210409] [cannot apply to vfio/next] [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/Eric-Auger/SMMUv3-Nested-Stage-S... base: e49d033bddf5b565044e2abe4241353959bc9120 config: arm-randconfig-r003-20210411 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9829f5e6b1bca9b61efc629770d28bb9014dec45) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/0day-ci/linux/commit/0af9db19db29eb2a707b9e1ca4ff9e1a0... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Eric-Auger/SMMUv3-Nested-Stage-Setup-VFIO-part/20210411-195216 git checkout 0af9db19db29eb2a707b9e1ca4ff9e1a08a1c511 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 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 drivers/vfio/vfio.c:32: In file included from include/linux/vfio.h:16: struct iommu_pasid_table_config config; /* used on SET */ ^ include/uapi/linux/vfio.h:1226:9: note: forward declaration of 'struct iommu_pasid_table_config' struct iommu_pasid_table_config config; /* used on SET */ ^ 1 error generated. vim +1226 include/uapi/linux/vfio.h 1211 1212 /* 1213 * VFIO_IOMMU_SET_PASID_TABLE - _IOWR(VFIO_TYPE, VFIO_BASE + 18, 1214 * struct vfio_iommu_type1_set_pasid_table) 1215 * 1216 * The SET operation passes a PASID table to the host while the 1217 * UNSET operation detaches the one currently programmed. It is 1218 * allowed to "SET" the table several times without unsetting as 1219 * long as the table config does not stay IOMMU_PASID_CONFIG_TRANSLATE. 1220 */ 1221 struct vfio_iommu_type1_set_pasid_table { 1222 __u32 argsz; 1223 __u32 flags; 1224 #define VFIO_PASID_TABLE_FLAG_SET (1 << 0) 1225 #define VFIO_PASID_TABLE_FLAG_UNSET (1 << 1) 1227 }; 1228 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org