tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.4 head: 091ed41c87f0bf89714d4aba9a4febec8cd5557b commit: 084d9bb286af924f2d01e7af0b70288cf8b9fac6 [4/5] FROMLIST: ASoC: qcom: sc7180: Add machine driver for sound card registration config: x86_64-allyesconfig (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project cf1105069648446d58adfb7a6cc590013d6886ba) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout 084d9bb286af924f2d01e7af0b70288cf8b9fac6 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 >>): int sc7180_parse_of(struct snd_soc_card *card) ^ sound/soc/qcom/sc7180.c:26:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int sc7180_parse_of(struct snd_soc_card *card) ^ static 1 warning generated. vim +/sc7180_parse_of +26 sound/soc/qcom/sc7180.c 25 27 { 28 struct device_node *np; 29 struct device_node *codec = NULL; 30 struct device_node *platform = NULL; 31 struct device_node *cpu = NULL; 32 struct device *dev = card->dev; 33 struct snd_soc_dai_link *link; 34 struct of_phandle_args args; 35 struct snd_soc_dai_link_component *dlc; 36 int ret, num_links, dir; 37 38 ret = snd_soc_of_parse_card_name(card, "model"); 39 if (ret) { 40 dev_err(dev, "Error parsing card name: %d\n", ret); 41 return ret; 42 } 43 44 /* DAPM routes */ 45 if (of_property_read_bool(dev->of_node, "audio-routing")) { 46 ret = snd_soc_of_parse_audio_routing(card, 47 "audio-routing"); 48 if (ret) 49 return ret; 50 } 51 52 /* Populate links */ 53 num_links = of_get_child_count(dev->of_node); 54 55 /* Allocate the DAI link array */ 56 card->dai_link = kcalloc(num_links, sizeof(*link), GFP_KERNEL); 57 if (!card->dai_link) 58 return -ENOMEM; 59 60 card->num_links = num_links; 61 link = card->dai_link; 62 63 for_each_child_of_node(dev->of_node, np) { 64 dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL); 65 if (!dlc) 66 return -ENOMEM; 67 68 link->cpus = &dlc[0]; 69 link->platforms = &dlc[1]; 70 71 link->num_cpus = 1; 72 link->num_platforms = 1; 73 74 ret = of_property_read_string(np, "link-name", &link->name); 75 if (ret) { 76 dev_err(card->dev, "error getting codec dai_link name\n"); 77 goto err; 78 } 79 80 of_property_read_u32(np, "unidirectional", &dir); 81 if (dir == 0) 82 link->playback_only = 1; 83 else if (dir == 1) 84 link->capture_only = 1; 85 86 cpu = of_get_child_by_name(np, "cpu"); 87 codec = of_get_child_by_name(np, "codec"); 88 89 if (!cpu) { 90 dev_err(dev, "%s: Can't find cpu DT node\n", 91 link->name); 92 ret = -EINVAL; 93 goto err; 94 } 95 96 ret = of_parse_phandle_with_args(cpu, "sound-dai", 97 "#sound-dai-cells", 0, &args); 98 if (ret) { 99 dev_err(card->dev, "%s: error getting cpu phandle\n", 100 link->name); 101 goto err; 102 } 103 link->cpus->of_node = args.np; 104 link->id = args.args[0]; 105 106 ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name); 107 if (ret) { 108 dev_err(card->dev, "%s: error getting cpu dai name\n", 109 link->name); 110 goto err; 111 } 112 113 if (codec) { 114 ret = snd_soc_of_get_dai_link_codecs(dev, codec, link); 115 if (ret < 0) { 116 dev_err(card->dev, "%s: codec dai not found\n", 117 link->name); 118 goto err; 119 } 120 } else { 121 dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL); 122 if (!dlc) 123 return -ENOMEM; 124 125 link->codecs = dlc; 126 link->num_codecs = 1; 127 128 link->codecs->dai_name = "snd-soc-dummy-dai"; 129 link->codecs->name = "snd-soc-dummy"; 130 } 131 132 link->platforms->of_node = link->cpus->of_node; 133 link->stream_name = link->name; 134 link++; 135 136 of_node_put(cpu); 137 of_node_put(codec); 138 } 139 140 return 0; 141 err: 142 of_node_put(np); 143 of_node_put(cpu); 144 of_node_put(codec); 145 of_node_put(platform); 146 kfree(card->dai_link); 147 return ret; 148 } 149 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org