tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: e098d7762d602be640c53565ceca342f81e55ad2 commit: 93bc3feee8bd5fbe29ad27779c5e7b369fd7c80b [6839/8703] rpmsg: glink: Integrate glink_ssr in qcom_glink config: x86_64-randconfig-a013-20200519 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 135b877874fae96b4372c8a3fbfaa8ff44ff86e3) reproduce: 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 93bc3feee8bd5fbe29ad27779c5e7b369fd7c80b # 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: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): void qcom_glink_ssr_notify(const char *ssr_name) ^ drivers/rpmsg/qcom_glink_ssr.c:64:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void qcom_glink_ssr_notify(const char *ssr_name) ^ static 1 warning generated. vim +/qcom_glink_ssr_notify +64 drivers/rpmsg/qcom_glink_ssr.c 5d1f2e3c8090c0 drivers/soc/qcom/glink_ssr.c Bjorn Andersson 2020-04-22 59 5d1f2e3c8090c0 drivers/soc/qcom/glink_ssr.c Bjorn Andersson 2020-04-22 60 /** 5d1f2e3c8090c0 drivers/soc/qcom/glink_ssr.c Bjorn Andersson 2020-04-22 61 * qcom_glink_ssr_notify() - notify GLINK SSR about stopped remoteproc 5d1f2e3c8090c0 drivers/soc/qcom/glink_ssr.c Bjorn Andersson 2020-04-22 62 * @ssr_name: name of the remoteproc that has been stopped 5d1f2e3c8090c0 drivers/soc/qcom/glink_ssr.c Bjorn Andersson 2020-04-22 63 */ 5d1f2e3c8090c0 drivers/soc/qcom/glink_ssr.c Bjorn Andersson 2020-04-22 @64 void qcom_glink_ssr_notify(const char *ssr_name) 5d1f2e3c8090c0 drivers/soc/qcom/glink_ssr.c Bjorn Andersson 2020-04-22 65 { 5d1f2e3c8090c0 drivers/soc/qcom/glink_ssr.c Bjorn Andersson 2020-04-22 66 blocking_notifier_call_chain(&ssr_notifiers, 0, (void *)ssr_name); 5d1f2e3c8090c0 drivers/soc/qcom/glink_ssr.c Bjorn Andersson 2020-04-22 67 } 5d1f2e3c8090c0 drivers/soc/qcom/glink_ssr.c Bjorn Andersson 2020-04-22 68 EXPORT_SYMBOL_GPL(qcom_glink_ssr_notify); 5d1f2e3c8090c0 drivers/soc/qcom/glink_ssr.c Bjorn Andersson 2020-04-22 69 :::::: The code at line 64 was first introduced by commit :::::: 5d1f2e3c8090c0769ee4a1b920e82277613327fc soc: qcom: glink_ssr: Internalize ssr_notifiers :::::: TO: Bjorn Andersson <bjorn.andersson(a)linaro.org&gt; :::::: CC: Bjorn Andersson <bjorn.andersson(a)linaro.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org