Hi Daniel, I love your patch! Yet something to improve: [auto build test ERROR on media-tree/master] [also build test ERROR on v5.16-rc5 next-20211215] [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/Daniel-Scally/Introduce-ancillary-links/20211214-073020 base: git://linuxtv.org/media_tree.git master config: x86_64-randconfig-r015-20211216 (https://download.01.org/0day-ci/archive/20211216/202112161906.gHHRLukN-lkp@xxxxxxxxx/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dd245bab9fbb364faa1581e4f92ba3119a872fba) 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 # https://github.com/0day-ci/linux/commit/7e7fcd65e8144f3ffa337760c26fb786f4028466 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Daniel-Scally/Introduce-ancillary-links/20211214-073020 git checkout 7e7fcd65e8144f3ffa337760c26fb786f4028466 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/media/v4l2-core/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> drivers/media/v4l2-core/v4l2-async.c:284:10: error: no member named 'entity' in 'struct v4l2_subdev' if (sd->entity.function != MEDIA_ENT_F_LENS && ~~ ^ drivers/media/v4l2-core/v4l2-async.c:285:10: error: no member named 'entity' in 'struct v4l2_subdev' sd->entity.function != MEDIA_ENT_F_FLASH) ~~ ^ drivers/media/v4l2-core/v4l2-async.c:288:52: error: no member named 'entity' in 'struct v4l2_subdev' link = media_create_ancillary_link(¬ifier->sd->entity, &sd->entity, ~~~~~~~~~~~~ ^ drivers/media/v4l2-core/v4l2-async.c:288:65: error: no member named 'entity' in 'struct v4l2_subdev' link = media_create_ancillary_link(¬ifier->sd->entity, &sd->entity, ~~ ^ drivers/media/v4l2-core/v4l2-async.c:309:24: error: no member named 'entity' in 'struct v4l2_subdev' switch (notifier->sd->entity.function) { ~~~~~~~~~~~~ ^ 5 errors generated. vim +284 drivers/media/v4l2-core/v4l2-async.c 277 278 static int 279 __v4l2_async_create_ancillary_link(struct v4l2_async_notifier *notifier, 280 struct v4l2_subdev *sd) 281 { 282 struct media_link *link; 283 > 284 if (sd->entity.function != MEDIA_ENT_F_LENS && 285 sd->entity.function != MEDIA_ENT_F_FLASH) 286 return -EINVAL; 287 288 link = media_create_ancillary_link(¬ifier->sd->entity, &sd->entity, 289 MEDIA_LNK_FL_ENABLED | 290 MEDIA_LNK_FL_IMMUTABLE); 291 292 return IS_ERR(link) ? PTR_ERR(link) : 0; 293 } 294 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx