[kbuild-all] [arnd-playground:randconfig-v5.12 397/597] arch/powerpc/kernel/pci-common.c:1440:35: warning: 'b' is used uninitialized in this function

tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git randconfig-v5.12 head: fd21c2581b744639b5207c11651ab40abf13701a commit: 130e1a398709fc631f3438fa57c450a4b392603e [397/597] pci: move PCI_PROBE_ONLY flag into host_bridge config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-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 130e1a398709fc631f3438fa57c450a4b392603e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 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 >>): arch/powerpc/kernel/pci-common.c: In function 'pcibios_resource_survey': 1440 | struct pci_host_bridge *bridge = pci_find_host_bridge(b); | ^~~~~~~~~~~~~~~~~~~~~~~ vim +/b +1440 arch/powerpc/kernel/pci-common.c 1436 1437 void __init pcibios_resource_survey(void) 1438 { 1439 struct pci_bus *b; 1441 1442 /* Allocate and assign resources */ 1443 list_for_each_entry(b, &pci_root_buses, node) 1444 pcibios_allocate_bus_resources(b); 1445 if (!pci_has_flag(PCI_REASSIGN_ALL_RSRC)) { 1446 pcibios_allocate_resources(0); 1447 pcibios_allocate_resources(1); 1448 } 1449 1450 /* Before we start assigning unassigned resource, we try to reserve 1451 * the low IO area and the VGA memory area if they intersect the 1452 * bus available resources to avoid allocating things on top of them 1453 */ 1454 if (!bridge->probe_only) { 1455 list_for_each_entry(b, &pci_root_buses, node) 1456 pcibios_reserve_legacy_regions(b); 1457 } 1458 1459 /* Now, if the platform didn't decide to blindly trust the firmware, 1460 * we proceed to assigning things that were left unassigned 1461 */ 1462 if (!bridge->probe_only) { 1463 pr_debug("PCI: Assigning unassigned resources...\n"); 1464 pci_assign_unassigned_resources(); 1465 } 1466 } 1467 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org