Hi Yunke, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on media-tree/master] [also build test WARNING on linus/master v6.1-rc2 next-20221025] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Yunke-Cao/media-Implement-UVC-v1-5-ROI/20221025-135821 base: git://linuxtv.org/media_tree.git master patch link: https://lore.kernel.org/r/20221025055528.1117251-3-yunkec%40google.com patch subject: [PATCH v9 02/11] media: uvcvideo: add uvc_ctrl_get_boundary for getting default value config: m68k-allyesconfig (attached as .config) compiler: m68k-linux-gcc (GCC) 12.1.0 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://github.com/intel-lab-lkp/linux/commit/3a37413c0b49718560da555fa58b7278de10202d git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Yunke-Cao/media-Implement-UVC-v1-5-ROI/20221025-135821 git checkout 3a37413c0b49718560da555fa58b7278de10202d # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash drivers/media/usb/uvc/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/media/usb/uvc/uvc_ctrl.c:1752:5: warning: no previous prototype for '__uvc_ctrl_get_boundary_std' [-Wmissing-prototypes] 1752 | int __uvc_ctrl_get_boundary_std(struct uvc_video_chain *chain, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/__uvc_ctrl_get_boundary_std +1752 drivers/media/usb/uvc/uvc_ctrl.c 1751 > 1752 int __uvc_ctrl_get_boundary_std(struct uvc_video_chain *chain, 1753 struct uvc_control *ctrl, 1754 struct uvc_control_mapping *mapping, 1755 struct v4l2_ext_control *xctrl) 1756 { 1757 struct v4l2_queryctrl qc = { .id = xctrl->id }; 1758 1759 int ret = __uvc_query_v4l2_ctrl(chain, ctrl, mapping, &qc); 1760 1761 if (ret < 0) 1762 return ret; 1763 1764 xctrl->value = qc.default_value; 1765 return 0; 1766 } 1767 -- 0-DAY CI Kernel Test Service https://01.org/lkp
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