Hi Dmitry, I love your patch! Perhaps something to improve: [auto build test WARNING on media-tree/master] [also build test WARNING on next-20220112] [cannot apply to v5.16] [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/Dmitry-Osipenko/Add-V4L-stateles... base: git://linuxtv.org/media_tree.git master config: powerpc-randconfig-s031-20220112 (https://download.01.org/0day-ci/archive/20220113/202201130310.BFtsDEXe-lk...) compiler: powerpc-linux-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/0day-ci/linux/commit/3b11791070fd9de6cd368f28578ebab73... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Dmitry-Osipenko/Add-V4L-stateless-video-decoder-API-support-to-NVIDIA-Tegra-driver/20220112-234115 git checkout 3b11791070fd9de6cd368f28578ebab731386a83 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/staging/media/tegra-vde/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +57 drivers/staging/media/tegra-vde/h264_reader.c 44 45 static inline u8 emulation_escape(struct bitstream_reader *reader, u32 offset, 46 u8 data, bool inc_offset, bool *escaped) 47 { 48 u32 seq; 49 50 if (data != 0x03 || !reader->rbsp_mode) 51 return data; 52 53 if (offset < 2 || offset == reader->bitstream_end) 54 return data; 55 56 seq = *((u32 *)(reader->data_ptr + offset - 2)); 58 59 switch (seq) { 60 case 0x00000300: 61 case 0x00000301: 62 case 0x00000302: 63 case 0x00000303: 64 if (inc_offset) 65 reader->data_offset++; 66 67 if (escaped) 68 *escaped = true; 69 70 return seq & 0xFF; 71 default: 72 break; 73 } 74 75 return data; 76 } 77 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org