tree: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git pci/resource head: 276b15de528734e8321d1367c634ecda3d143d71 commit: 276b15de528734e8321d1367c634ecda3d143d71 [2/2] PCI: Coalesce host bridge contiguous apertures config: powerpc64-randconfig-r016-20210526 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 6505c630407c5feec818f0bb1c284f9eeebf2071) 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 # install powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git/commit/?id=276b15de528734e8321d1367c634ecda3d143d71 git remote add pci https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git git fetch --no-tags pci pci/resource git checkout 276b15de528734e8321d1367c634ecda3d143d71 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> drivers/pci/probe.c:981:30: error: incompatible function pointer types passing 'int (void *, struct list_head *, struct list_head *)' to parameter of type 'list_cmp_func_t' (aka 'int (*)(void *, const struct list_head *, const struct list_head *)') [-Werror,-Wincompatible-function-pointer-types] list_sort(NULL, &resources, res_cmp); ^~~~~~~ include/linux/list_sort.h:13:68: note: passing argument to parameter 'cmp' here void list_sort(void *priv, struct list_head *head, list_cmp_func_t cmp); ^ 1 error generated. vim +981 drivers/pci/probe.c 920 921 b = pci_find_bus(pci_domain_nr(bus), bridge->busnr); 922 if (b) { 923 /* Ignore it if we already got here via a different bridge */ 924 dev_dbg(&b->dev, "bus already known\n"); 925 err = -EEXIST; 926 goto free; 927 } 928 929 dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(bus), 930 bridge->busnr); 931 932 err = pcibios_root_bridge_prepare(bridge); 933 if (err) 934 goto free; 935 936 err = device_add(&bridge->dev); 937 if (err) { 938 put_device(&bridge->dev); 939 goto free; 940 } 941 bus->bridge = get_device(&bridge->dev); 942 device_enable_async_suspend(bus->bridge); 943 pci_set_bus_of_node(bus); 944 pci_set_bus_msi_domain(bus); 945 if (bridge->msi_domain && !dev_get_msi_domain(&bus->dev)) 946 bus->bus_flags |= PCI_BUS_FLAGS_NO_MSI; 947 948 if (!parent) 949 set_dev_node(bus->bridge, pcibus_to_node(bus)); 950 951 bus->dev.class = &pcibus_class; 952 bus->dev.parent = bus->bridge; 953 954 dev_set_name(&bus->dev, "%04x:%02x", pci_domain_nr(bus), bus->number); 955 name = dev_name(&bus->dev); 956 957 err = device_register(&bus->dev); 958 if (err) 959 goto unregister; 960 961 pcibios_add_bus(bus); 962 963 if (bus->ops->add_bus) { 964 err = bus->ops->add_bus(bus); 965 if (WARN_ON(err < 0)) 966 dev_err(&bus->dev, "failed to add bus: %d\n", err); 967 } 968 969 /* Create legacy_io and legacy_mem files for this bus */ 970 pci_create_legacy_files(bus); 971 972 if (parent) 973 dev_info(parent, "PCI host bridge to bus %s\n", name); 974 else 975 pr_info("PCI host bridge to bus %s\n", name); 976 977 if (nr_node_ids > 1 && pcibus_to_node(bus) == NUMA_NO_NODE) 978 dev_warn(&bus->dev, "Unknown NUMA node; performance will be reduced\n"); 979 980 /* Sort and coalesce contiguous windows */ > 981 list_sort(NULL, &resources, res_cmp); 982 resource_list_for_each_entry_safe(window, n, &resources) { 983 if (list_is_last(&window->node, &resources)) 984 break; 985 986 next = list_next_entry(window, node); 987 offset = window->offset; 988 res = window->res; 989 next_offset = next->offset; 990 next_res = next->res; 991 992 if (res->flags != next_res->flags || offset != next_offset) 993 continue; 994 995 if (res->end + 1 == next_res->start) { 996 next_res->start = res->start; 997 res->flags = res->start = res->end = 0; 998 } 999 } 1000 1001 /* Add initial resources to the bus */ 1002 resource_list_for_each_entry_safe(window, n, &resources) { 1003 offset = window->offset; 1004 res = window->res; 1005 if (!res->end) 1006 continue; 1007 1008 list_move_tail(&window->node, &bridge->windows); 1009 1010 if (res->flags & IORESOURCE_BUS) 1011 pci_bus_insert_busn_res(bus, bus->number, res->end); 1012 else 1013 pci_bus_add_resource(bus, res, 0); 1014 1015 if (offset) { 1016 if (resource_type(res) == IORESOURCE_IO) 1017 fmt = " (bus address [%#06llx-%#06llx])"; 1018 else 1019 fmt = " (bus address [%#010llx-%#010llx])"; 1020 1021 snprintf(addr, sizeof(addr), fmt, 1022 (unsigned long long)(res->start - offset), 1023 (unsigned long long)(res->end - offset)); 1024 } else 1025 addr[0] = '\0'; 1026 1027 dev_info(&bus->dev, "root bus resource %pR%s\n", res, addr); 1028 } 1029 1030 down_write(&pci_bus_sem); 1031 list_add_tail(&bus->node, &pci_root_buses); 1032 up_write(&pci_bus_sem); 1033 1034 return 0; 1035 1036 unregister: 1037 put_device(&bridge->dev); 1038 device_del(&bridge->dev); 1039 1040 free: 1041 kfree(bus); 1042 return err; 1043 } 1044 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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