tree: https://github.com/morimoto/linux fw-cleanup-2021-02-16-v1 head: 3adc94e2c5d7b6db803cfb9de2bb133fbcba7bea commit: 153639a8fed780ad137c3ced7a41005a0ede704a [45/96] ASoC: audio-graph: move audio_graph_card_probe() to simple-card-utils.c config: x86_64-randconfig-a005-20210215 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476) 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 # https://github.com/morimoto/linux/commit/153639a8fed780ad137c3ced7a41005a... git remote add morimoto-linux https://github.com/morimoto/linux git fetch --no-tags morimoto-linux fw-cleanup-2021-02-16-v1 git checkout 153639a8fed780ad137c3ced7a41005a0ede704a # 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 audio_graph_card_probe(struct snd_soc_card *card) ^ sound/soc/generic/simple-card-utils.c:742:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int audio_graph_card_probe(struct snd_soc_card *card) ^ static 1 warning generated. vim +/audio_graph_card_probe +742 sound/soc/generic/simple-card-utils.c 741 743 { 744 struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(card); 745 int ret; 746 747 ret = asoc_simple_init_hp(card, &priv->hp_jack, NULL); 748 if (ret < 0) 749 return ret; 750 751 ret = asoc_simple_init_mic(card, &priv->mic_jack, NULL); 752 if (ret < 0) 753 return ret; 754 755 return 0; 756 } 757 EXPORT_SYMBOL_GPL(audio_graph_card_probe); 758 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org