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/20220125/202201252054.hseJFdV8-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/26fe84b0a51bd240210f39bfc5a2ed1c5... 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 26fe84b0a51bd240210f39bfc5a2ed1c57ce8be0 # 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/vdec.c: In function 'vdec_cleanup': drivers/media/platform/amphion/vdec.c:1383:17: error: implicit declaration of function 'vfree'; did you mean 'kvfree'? [-Werror=implicit-function-declaration] 1383 | vfree(vdec); | ^~~~~ | kvfree drivers/media/platform/amphion/vdec.c: In function 'vdec_open': drivers/media/platform/amphion/vdec.c:1632:16: error: implicit declaration of function 'vzalloc'; did you mean 'kvzalloc'? [-Werror=implicit-function-declaration] 1632 | inst = vzalloc(sizeof(*inst)); | ^~~~~~~ | kvzalloc 1632 | inst = vzalloc(sizeof(*inst)); | ^ 1636 | vdec = vzalloc(sizeof(*vdec)); | ^ cc1: some warnings being treated as errors vim +1632 drivers/media/platform/amphion/vdec.c 1625 1626 static int vdec_open(struct file *file) 1627 { 1628 struct vpu_inst *inst; 1629 struct vdec_t *vdec; 1630 int ret; 1631 1633 if (!inst) 1634 return -ENOMEM; 1635 1637 if (!vdec) { 1638 vfree(inst); 1639 return -ENOMEM; 1640 } 1641 1642 inst->ops = &vdec_inst_ops; 1643 inst->formats = vdec_formats; 1644 inst->type = VPU_CORE_TYPE_DEC; 1645 inst->priv = vdec; 1646 1647 ret = vpu_v4l2_open(file, inst); 1648 if (ret) 1649 return ret; 1650 1651 vdec->fixed_fmt = false; 1652 inst->min_buffer_cap = VDEC_MIN_BUFFER_CAP; 1653 vdec_init(file); 1654 1655 return 0; 1656 } 1657 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org