Hi Farhan, kernel test robot noticed the following build warnings: [auto build test WARNING on awilliam-vfio/next] [also build test WARNING on s390/features linus/master v6.17-rc1 next-20250813] [cannot apply to kvms390/next awilliam-vfio/for-linus] [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/Farhan-Ali/s390-pci-Restore-airq-unconditionally-for-the-zPCI-device/20250814-012243 base: https://github.com/awilliam/linux-vfio.git next patch link: https://lore.kernel.org/r/20250813170821.1115-6-alifm%40linux.ibm.com patch subject: [PATCH v1 5/6] vfio-pci/zdev: Perform platform specific function reset for zPCI config: i386-randconfig-005-20250814 (https://download.01.org/0day-ci/archive/20250814/202508141314.OUnmuib7-lkp@xxxxxxxxx/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250814/202508141314.OUnmuib7-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/202508141314.OUnmuib7-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/vfio/pci/vfio_pci_intrs.c:23: >> drivers/vfio/pci/vfio_pci_priv.h:104:5: warning: no previous prototype for function 'vfio_pci_zdev_reset' [-Wmissing-prototypes] 104 | int vfio_pci_zdev_reset(struct vfio_pci_core_device *vdev) | ^ drivers/vfio/pci/vfio_pci_priv.h:104:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 104 | int vfio_pci_zdev_reset(struct vfio_pci_core_device *vdev) | ^ | static 1 warning generated. vim +/vfio_pci_zdev_reset +104 drivers/vfio/pci/vfio_pci_priv.h 101 102 static inline void vfio_pci_zdev_close_device(struct vfio_pci_core_device *vdev) 103 {} > 104 int vfio_pci_zdev_reset(struct vfio_pci_core_device *vdev) 105 { 106 return -ENODEV; 107 } 108 #endif 109 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki