Hi Yuanchu, kernel test robot noticed the following build errors: [auto build test ERROR on linus/master] [also build test ERROR on v6.12-rc4 next-20241023] [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/Yuanchu-Xie/virt-pvmemcontrol-add-Yuanchu-and-Pasha-as-maintainers/20241022-045035 base: linus/master patch link: https://lore.kernel.org/r/20241021204849.1580384-1-yuanchu%40google.com patch subject: [PATCH v4 1/2] virt: pvmemcontrol: control guest physical memory properties config: powerpc-randconfig-002-20241024 (https://download.01.org/0day-ci/archive/20241024/202410240605.Hr0JFxmp-lkp@xxxxxxxxx/config) compiler: powerpc-linux-gcc (GCC) 14.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241024/202410240605.Hr0JFxmp-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/202410240605.Hr0JFxmp-lkp@xxxxxxxxx/ All error/warnings (new ones prefixed by >>): >> drivers/virt/pvmemcontrol/pvmemcontrol.c:455:1: warning: data definition has no type or storage class 455 | module_pci_driver(pvmemcontrol_pci_driver); | ^~~~~~~~~~~~~~~~~ >> drivers/virt/pvmemcontrol/pvmemcontrol.c:455:1: error: type defaults to 'int' in declaration of 'module_pci_driver' [-Wimplicit-int] >> drivers/virt/pvmemcontrol/pvmemcontrol.c:455:1: error: parameter names (without types) in function declaration [-Wdeclaration-missing-parameter-type] >> drivers/virt/pvmemcontrol/pvmemcontrol.c:449:26: warning: 'pvmemcontrol_pci_driver' defined but not used [-Wunused-variable] 449 | static struct pci_driver pvmemcontrol_pci_driver = { | ^~~~~~~~~~~~~~~~~~~~~~~ vim +455 drivers/virt/pvmemcontrol/pvmemcontrol.c 448 > 449 static struct pci_driver pvmemcontrol_pci_driver = { 450 .name = "pvmemcontrol", 451 .id_table = pvmemcontrol_pci_id_tbl, 452 .probe = pvmemcontrol_pci_probe, 453 .remove = pvmemcontrol_pci_remove, 454 }; > 455 module_pci_driver(pvmemcontrol_pci_driver); 456 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki