Hi Niklas, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 9606f9efb1cec7f8f5912326f182fbfbcad34382 commit: 5814f32fef137e34577c4f053272c53e7ca33cd9 [925/4921] media: staging: max96712: Add basic support for MAX96712 GMSL2 deserializer config: arc-randconfig-r023-20211202 (https://download.01.org/0day-ci/archive/20211203/202112031447.GpyZHoNB-lkp@xxxxxxxxx/config) compiler: arc-elf-gcc (GCC) 11.2.0 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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=5814f32fef137e34577c4f053272c53e7ca33cd9 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 5814f32fef137e34577c4f053272c53e7ca33cd9 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>, old ones prefixed by <<): >> ERROR: modpost: "v4l2_async_register_subdev" [drivers/staging/media/max96712/max96712.ko] undefined! >> ERROR: modpost: "v4l2_ctrl_handler_free" [drivers/staging/media/max96712/max96712.ko] undefined! >> ERROR: modpost: "v4l2_ctrl_new_std_menu_items" [drivers/staging/media/max96712/max96712.ko] undefined! >> ERROR: modpost: "v4l2_ctrl_new_std" [drivers/staging/media/max96712/max96712.ko] undefined! >> ERROR: modpost: "v4l2_ctrl_handler_init_class" [drivers/staging/media/max96712/max96712.ko] undefined! >> ERROR: modpost: "v4l2_fwnode_endpoint_parse" [drivers/staging/media/max96712/max96712.ko] undefined! >> ERROR: modpost: "v4l2_async_unregister_subdev" [drivers/staging/media/max96712/max96712.ko] undefined! Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for VIDEO_V4L2_SUBDEV_API Depends on MEDIA_SUPPORT && VIDEO_DEV && MEDIA_CONTROLLER Selected by - VIDEO_MAX96712 && STAGING && STAGING_MEDIA && MEDIA_SUPPORT && I2C && OF_GPIO --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
