Hi Ming, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on e783362eb54cd99b2cac8b3a9aeac942e6f6ac07] url: https://github.com/0day-ci/linux/commits/Ming-Qian/amphion-video-decoder-... base: e783362eb54cd99b2cac8b3a9aeac942e6f6ac07 config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20220125/202201251914.xAqudfEM-lk...) compiler: alpha-linux-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://github.com/0day-ci/linux/commit/0d6244aad6fd7e7c377163865a29319cb... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Ming-Qian/amphion-video-decoder-encoder-driver/20220125-152112 git checkout 0d6244aad6fd7e7c377163865a29319cb2a6df84 # 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=alpha SHELL=/bin/bash drivers/media/platform/amphion/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/media/platform/amphion/venc.c: In function 'venc_get_encoded_frames': drivers/media/platform/amphion/venc.c:832:17: error: implicit declaration of function 'vfree'; did you mean 'kvfree'? [-Werror=implicit-function-declaration] 832 | vfree(frame); | ^~~~~ | kvfree drivers/media/platform/amphion/venc.c: In function 'venc_frame_encoded': drivers/media/platform/amphion/venc.c:848:17: error: implicit declaration of function 'vzalloc'; did you mean 'kvzalloc'? [-Werror=implicit-function-declaration] 848 | frame = vzalloc(sizeof(*frame)); | ^~~~~~~ | kvzalloc 848 | frame = vzalloc(sizeof(*frame)); | ^ drivers/media/platform/amphion/venc.c: In function 'venc_open': 1321 | inst = vzalloc(sizeof(*inst)); | ^ 1325 | venc = vzalloc(sizeof(*venc)); | ^ cc1: some warnings being treated as errors vim +848 drivers/media/platform/amphion/venc.c 837 838 static int venc_frame_encoded(struct vpu_inst *inst, void *arg) 839 { 840 struct vpu_enc_pic_info *info = arg; 841 struct venc_frame_t *frame; 842 struct venc_t *venc; 843 int ret = 0; 844 845 if (!inst || !info) 846 return -EINVAL; 847 venc = inst->priv; 849 if (!frame) 850 return -ENOMEM; 851 852 memcpy(&frame->info, info, sizeof(frame->info)); 853 frame->bytesused = info->frame_size; 854 855 vpu_inst_lock(inst); 856 list_add_tail(&frame->list, &venc->frames); 857 venc->encode_count++; 858 venc_get_encoded_frames(inst); 859 vpu_inst_unlock(inst); 860 861 return ret; 862 } 863 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org