Hi Shuai, kernel test robot noticed the following build warnings: [auto build test WARNING on soc/for-next] [also build test WARNING on linus/master v6.3-rc6 next-20230406] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Shuai-Xue/drivers-perf-add-DesignWare-PCIe-PMU-driver/20230410-121727 base: https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next patch link: https://lore.kernel.org/r/20230410031702.68355-3-xueshuai%40linux.alibaba.com patch subject: [PATCH v2 2/3] drivers/perf: add DesignWare PCIe PMU driver config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20230410/202304101501.5weSAuW5-lkp@xxxxxxxxx/config) compiler: s390-linux-gcc (GCC) 12.1.0 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/intel-lab-lkp/linux/commit/279673b15957e3ea9c14fded1e41a861a6d8b2d9 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Shuai-Xue/drivers-perf-add-DesignWare-PCIe-PMU-driver/20230410-121727 git checkout 279673b15957e3ea9c14fded1e41a861a6d8b2d9 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202304101501.5weSAuW5-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/perf/dwc_pcie_pmu.c:195:9: warning: no previous prototype for 'dwc_pcie_event_show' [-Wmissing-prototypes] 195 | ssize_t dwc_pcie_event_show(struct device *dev, | ^~~~~~~~~~~~~~~~~~~ vim +/dwc_pcie_event_show +195 drivers/perf/dwc_pcie_pmu.c 194 > 195 ssize_t dwc_pcie_event_show(struct device *dev, 196 struct device_attribute *attr, char *page) 197 { 198 struct dwc_pcie_event_attr *eattr; 199 200 eattr = container_of(attr, typeof(*eattr), attr); 201 202 if (eattr->type == DWC_PCIE_LANE_EVENT) 203 return sprintf(page, "eventid=0x%lx, type=0x%lx, lane=0x%lx\n", 204 (unsigned long)eattr->eventid, 205 (unsigned long)eattr->type, 206 (unsigned long)eattr->lane); 207 else 208 return sprintf(page, "eventid=0x%lx, type=0x%lx", 209 (unsigned long)eattr->eventid, 210 (unsigned long)eattr->type); 211 } 212 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
