tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git pci-probe-rework-20210320 head: 0f62dd81d92215e38f654f21e515888fbb2b580c commit: 7a22028cb63a45687bfd4254db6c99d96c73eaa5 [22/24] pci: move PCI_PROBE_ONLY flag into host_bridge config: mips-tb0287_defconfig (attached as .config) compiler: mipsel-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 pci-probe-rework-20210320 git checkout 7a22028cb63a45687bfd4254db6c99d96c73eaa5 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 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/mips/pci/pci-legacy.c: In function 'pcibios_fixup_bus': 297 | struct pci_host_bridge->bridge = pci_find_host_bridge(bus); | ^~ 299 | if (bridge->probe_only && dev && | ^~~~~~ arch/mips/pci/pci-legacy.c:299:6: note: each undeclared identifier is reported only once for each function it appears in vim +297 arch/mips/pci/pci-legacy.c 293 294 void pcibios_fixup_bus(struct pci_bus *bus) 295 { 296 struct pci_dev *dev = bus->self; 298 300 (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { 301 pci_read_bridge_bases(bus); 302 } 303 } 304 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org