tree: https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git features head: 1a80b54d1ce1556bba6a8d8cd9384d6a9dcb641a commit: abb95b7550f88bfb77081601f80662a259f2d143 [16/25] s390/pci: consolidate SR-IOV specific code config: s390-randconfig-r021-20200913 (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 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 git checkout abb95b7550f88bfb77081601f80662a259f2d143 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 23 | void zpci_iov_map_resources(struct pci_dev *pdev) | ^~~~~~~~~~~~~~~~~~~~~~ 38 | void zpci_iov_remove_virtfn(struct pci_dev *pdev, int vfn) | ^~~~~~~~~~~~~~~~~~~~~~ 61 | int zpci_iov_setup_virtfn(struct zpci_bus *zbus, struct pci_dev *virtfn, int vfn) | ^~~~~~~~~~~~~~~~~~~~~ # https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?id... git remote add s390 https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git git fetch --no-tags s390 features git checkout abb95b7550f88bfb77081601f80662a259f2d143 vim +/zpci_iov_map_resources +23 arch/s390/pci/pci_iov.c 22 24 { 25 resource_size_t len; 26 int i; 27 28 for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { 29 int bar = i + PCI_IOV_RESOURCES; 30 31 len = pci_resource_len(pdev, bar); 32 if (!len) 33 continue; 34 pdev->resource[bar].parent = &iov_res; 35 } 36 } 37 39 { 40 pci_lock_rescan_remove(); 41 /* Linux' vfid's start at 0 vfn at 1 */ 42 pci_iov_remove_virtfn(pdev->physfn, vfn - 1); 43 pci_unlock_rescan_remove(); 44 } 45 46 static int zpci_iov_link_virtfn(struct pci_dev *pdev, struct pci_dev *virtfn, int vfid) 47 { 48 int rc; 49 50 rc = pci_iov_sysfs_link(pdev, virtfn, vfid); 51 if (rc) 52 return rc; 53 54 virtfn->is_virtfn = 1; 55 virtfn->multifunction = 0; 56 virtfn->physfn = pci_dev_get(pdev); 57 58 return 0; 59 } 60 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org