tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.4 head: 1b71f6d620191293322fc574c20ed5130b794ac7 commit: f04d055758de31185e1b298147cae3de6349dba1 [31/67] CHROMIUM: media: mtk-vcodec: Use component framework to manage each hardware information config: arm-randconfig-r024-20210416 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 6a18cc23efad410db48a3ccfc233d215de7d4cb9) 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 git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel git fetch --no-tags chrome-os chromeos-5.4 git checkout f04d055758de31185e1b298147cae3de6349dba1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm 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 >>): struct component_match *mtk_vdec_match_add(struct mtk_vcodec_dev *vdec_dev) ^ drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c:70:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct component_match *mtk_vdec_match_add(struct mtk_vcodec_dev *vdec_dev) ^ static 1 warning generated. vim +/mtk_vdec_match_add +70 drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c 69 71 { 72 struct platform_device *pdev = vdec_dev->plat_dev; 73 struct component_match *match = NULL; 74 int i; 75 76 for (i = 0; i < ARRAY_SIZE(mtk_vdec_drv_ids); i++) { 77 struct device_node *comp_node; 78 enum mtk_vdec_hw_id comp_idx; 79 const struct of_device_id *of_id; 80 81 comp_node = of_find_compatible_node(NULL, NULL, 82 mtk_vdec_drv_ids[i].compatible); 83 if (!comp_node) 84 continue; 85 86 if (!of_device_is_available(comp_node)) { 87 of_node_put(comp_node); 88 dev_err(&pdev->dev, "Fail to get MMSYS node\n"); 89 continue; 90 } 91 92 of_id = of_match_node(mtk_vdec_drv_ids, comp_node); 93 if (!of_id) { 94 dev_err(&pdev->dev, "Failed to get match node\n"); 95 return ERR_PTR(-EINVAL); 96 } 97 98 comp_idx = (enum mtk_vdec_hw_id)of_id->data; 99 mtk_v4l2_debug(4, "Get component:hw_id(%d),vdec_dev(0x%p),comp_node(0x%p)\n", 100 comp_idx, vdec_dev, comp_node); 101 vdec_dev->component_node[comp_idx] = comp_node; 102 103 component_match_add_release(&pdev->dev, &match, mtk_vdec_release_of, 104 mtk_vdec_compare_of, comp_node); 105 } 106 107 return match; 108 } 109 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org