Hi, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on usb/usb-testing] [also build test WARNING on linus/master v5.17-rc4 next-20220216] [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/3090101217-zju-edu-cn/usb-gadget-uvc-add-framebased-stream-support/20220216-162037 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing config: arm-randconfig-r023-20220216 (https://download.01.org/0day-ci/archive/20220217/202202170211.van9U4Ha-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0e628a783b935c70c80815db6c061ec84f884af5) 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/475fba6b60329d9270b699550907a5e077cd84b6 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review 3090101217-zju-edu-cn/usb-gadget-uvc-add-framebased-stream-support/20220216-162037 git checkout 475fba6b60329d9270b699550907a5e077cd84b6 # 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=arm SHELL=/bin/bash block// drivers/usb/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/usb/gadget/function/uvc_configfs.c:1091:3: warning: field within 'struct uvcg_frame::(unnamed at drivers/usb/gadget/function/uvc_configfs.c:1068:2)' is less aligned than 'union uvcg_frame::(anonymous at drivers/usb/gadget/function/uvc_configfs.c:1091:3)' and is usually due to 'struct uvcg_frame::(unnamed at drivers/usb/gadget/function/uvc_configfs.c:1068:2)' being packed, which can lead to unaligned accesses [-Wunaligned-access] union { ^ 1 warning generated. vim +1091 drivers/usb/gadget/function/uvc_configfs.c 1060 1061 /* ----------------------------------------------------------------------------- 1062 * streaming/<mode>/<format>/<NAME> 1063 */ 1064 1065 struct uvcg_frame { 1066 struct config_item item; 1067 enum uvcg_format_type fmt_type; 1068 struct { 1069 u8 b_length; 1070 u8 b_descriptor_type; 1071 u8 b_descriptor_subtype; 1072 u8 b_frame_index; 1073 u8 bm_capabilities; 1074 u16 w_width; 1075 u16 w_height; 1076 u32 dw_min_bit_rate; 1077 u32 dw_max_bit_rate; 1078 1079 /* 1080 * The layout of last three members of framebased frame 1081 * is different from uncompressed frame. 1082 * Last three members of uncompressed frame are: 1083 * u32 dw_max_video_frame_buffer_size; 1084 * u32 dw_default_frame_interval; 1085 * u8 b_frame_interval_type; 1086 * Last three members of framebased frame are: 1087 * u32 dw_default_frame_interval; 1088 * u8 b_frame_interval_type; 1089 * u32 dw_bytes_perline; 1090 */ > 1091 union { 1092 u32 dw_max_video_frame_buffer_size; 1093 u32 dw_bytes_perline; 1094 }; 1095 u32 dw_default_frame_interval; 1096 u8 b_frame_interval_type; 1097 } __attribute__((packed)) frame; 1098 u32 *dw_frame_interval; 1099 }; 1100 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
