tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git pci-probe-rework-20210320 head: 7339be76e8b2bf033b46af22922fd3ab88c122d2 commit: 09d4fafeb5efb4b5464774682645b93a6eb18293 [22/24] pci: move PCI_PROBE_ONLY flag into host_bridge config: alpha-randconfig-r024-20210321 (attached as .config) compiler: alpha-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 09d4fafeb5efb4b5464774682645b93a6eb18293 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha 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/alpha/kernel/pci.c: In function 'pcibios_fixup_bus': 254 | struct pci_host_bridge = pci_find_host_bridge(bus); | ^ 256 | if (bridge->probe_only && dev && | ^~~~~~ arch/alpha/kernel/pci.c:256:6: note: each undeclared identifier is reported only once for each function it appears in arch/alpha/kernel/pci.c: At top level: arch/alpha/kernel/pci.c:283:1: warning: no previous prototype for 'pcibios_claim_one_bus' [-Wmissing-prototypes] 283 | pcibios_claim_one_bus(struct pci_bus *b) | ^~~~~~~~~~~~~~~~~~~~~ vim +254 arch/alpha/kernel/pci.c 250 251 void pcibios_fixup_bus(struct pci_bus *bus) 252 { 253 struct pci_dev *dev = bus->self; 255 257 (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { 258 pci_read_bridge_bases(bus); 259 } 260 261 list_for_each_entry(dev, &bus->devices, bus_list) { 262 pdev_save_srm_config(dev); 263 } 264 } 265 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org