Hi Ben, kernel test robot noticed the following build warnings: [auto build test WARNING on rafael-pm/linux-next] [also build test WARNING on linus/master v6.5 next-20230905] [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/Ben-Cheatham/CXL-PCIE-Add-cxl_rcrb_addr-file-to-dport_dev/20230906-025405 base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next patch link: https://lore.kernel.org/r/20230905184406.135851-3-Benjamin.Cheatham%40amd.com patch subject: [PATCH v3 2/3] ACPI, APEI, EINJ: Add CXL 1.1 EINJ error type support config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20230906/202309060439.NyMjpqql-lkp@xxxxxxxxx/config) compiler: alpha-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230906/202309060439.NyMjpqql-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202309060439.NyMjpqql-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/cxl/cxl.h:11, from drivers/cxl/cxlmem.h:9, from drivers/cxl/core/port.c:11: >> include/linux/cxl.h:12:19: warning: no previous prototype for 'cxl_find_rch_dport_by_rcrb' [-Wmissing-prototypes] 12 | struct cxl_dport *cxl_find_rch_dport_by_rcrb(resource_size_t rcrb_base) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/cxl/core/port.c:1125:19: error: redefinition of 'cxl_find_rch_dport_by_rcrb' 1125 | struct cxl_dport *cxl_find_rch_dport_by_rcrb(resource_size_t rcrb_base) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/cxl.h:12:19: note: previous definition of 'cxl_find_rch_dport_by_rcrb' with type 'struct cxl_dport *(resource_size_t)' {aka 'struct cxl_dport *(long long unsigned int)'} 12 | struct cxl_dport *cxl_find_rch_dport_by_rcrb(resource_size_t rcrb_base) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ -- In file included from drivers/cxl/cxl.h:11, from drivers/cxl/cxlmem.h:9, from drivers/cxl/core/pmem.c:6: >> include/linux/cxl.h:12:19: warning: no previous prototype for 'cxl_find_rch_dport_by_rcrb' [-Wmissing-prototypes] 12 | struct cxl_dport *cxl_find_rch_dport_by_rcrb(resource_size_t rcrb_base) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/cxl_find_rch_dport_by_rcrb +12 include/linux/cxl.h 8 9 #if IS_ENABLED(CONFIG_CXL_ACPI) 10 struct cxl_dport *cxl_find_rch_dport_by_rcrb(resource_size_t rcrb_base); 11 #else > 12 struct cxl_dport *cxl_find_rch_dport_by_rcrb(resource_size_t rcrb_base) 13 { 14 return NULL; 15 } 16 #endif 17 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki