tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git randconfig-v5.12 head: fd21c2581b744639b5207c11651ab40abf13701a commit: aeb172ab4efb38a4817cf99c9c977d89130c3937 [390/597] pci: s390: remove redundant zbus->bus member config: s390-allyesconfig (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 # https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commi... git remote add arnd-playground https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git git fetch --no-tags arnd-playground randconfig-v5.12 git checkout aeb172ab4efb38a4817cf99c9c977d89130c3937 # 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 errors (new ones prefixed by >>): arch/s390/pci/pci_iov.c: In function 'zpci_iov_setup_virtfn': 84 | pdev = pci_get_slot(zbus->bus, zdev->devfn); | ^~ vim +84 arch/s390/pci/pci_iov.c abb95b7550f88b Niklas Schnelle 2020-08-17 62 abb95b7550f88b Niklas Schnelle 2020-08-17 63 int zpci_iov_setup_virtfn(struct zpci_bus *zbus, struct pci_dev *virtfn, int vfn) abb95b7550f88b Niklas Schnelle 2020-08-17 64 { abb95b7550f88b Niklas Schnelle 2020-08-17 65 int i, cand_devfn; abb95b7550f88b Niklas Schnelle 2020-08-17 66 struct zpci_dev *zdev; abb95b7550f88b Niklas Schnelle 2020-08-17 67 struct pci_dev *pdev; abb95b7550f88b Niklas Schnelle 2020-08-17 68 int vfid = vfn - 1; /* Linux' vfid's start at 0 vfn at 1*/ abb95b7550f88b Niklas Schnelle 2020-08-17 69 int rc = 0; abb95b7550f88b Niklas Schnelle 2020-08-17 70 abb95b7550f88b Niklas Schnelle 2020-08-17 71 if (!zbus->multifunction) abb95b7550f88b Niklas Schnelle 2020-08-17 72 return 0; abb95b7550f88b Niklas Schnelle 2020-08-17 73 abb95b7550f88b Niklas Schnelle 2020-08-17 74 /* If the parent PF for the given VF is also configured in the abb95b7550f88b Niklas Schnelle 2020-08-17 75 * instance, it must be on the same zbus. abb95b7550f88b Niklas Schnelle 2020-08-17 76 * We can then identify the parent PF by checking what abb95b7550f88b Niklas Schnelle 2020-08-17 77 * devfn the VF would have if it belonged to that PF using the PF's abb95b7550f88b Niklas Schnelle 2020-08-17 78 * stride and offset. Only if this candidate devfn matches the abb95b7550f88b Niklas Schnelle 2020-08-17 79 * actual devfn will we link both functions. abb95b7550f88b Niklas Schnelle 2020-08-17 80 */ abb95b7550f88b Niklas Schnelle 2020-08-17 81 for (i = 0; i < ZPCI_FUNCTIONS_PER_BUS; i++) { abb95b7550f88b Niklas Schnelle 2020-08-17 82 zdev = zbus->function[i]; abb95b7550f88b Niklas Schnelle 2020-08-17 83 if (zdev && zdev->is_physfn) { abb95b7550f88b Niklas Schnelle 2020-08-17 @84 pdev = pci_get_slot(zbus->bus, zdev->devfn); :::::: The code at line 84 was first introduced by commit :::::: abb95b7550f88bfb77081601f80662a259f2d143 s390/pci: consolidate SR-IOV specific code :::::: TO: Niklas Schnelle <schnelle(a)linux.ibm.com&gt; :::::: CC: Vasily Gorbik <gor(a)linux.ibm.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org