489 	struct pci_bus *b;  in pci_alloc_bus()  local
491 	b = kzalloc(sizeof(*b), GFP_KERNEL);  in pci_alloc_bus()
492 	if (!b)  in pci_alloc_bus()
495 	INIT_LIST_HEAD(&b->node);  in pci_alloc_bus()
496 	INIT_LIST_HEAD(&b->children);  in pci_alloc_bus()
497 	INIT_LIST_HEAD(&b->devices);  in pci_alloc_bus()
498 	INIT_LIST_HEAD(&b->slots);  in pci_alloc_bus()
499 	INIT_LIST_HEAD(&b->resources);  in pci_alloc_bus()
500 	b->max_bus_speed = PCI_SPEED_UNKNOWN;  in pci_alloc_bus()
501 	b->cur_bus_speed = PCI_SPEED_UNKNOWN;  in pci_alloc_bus()
504 		b->domain_nr = parent->domain_nr;  in pci_alloc_bus()
506 	return b;  in pci_alloc_bus()
521 static struct pci_host_bridge *pci_alloc_host_bridge(struct pci_bus *b)  in pci_alloc_host_bridge()  argument
530 	bridge->bus = b;  in pci_alloc_host_bridge()
1931 	struct pci_bus *b, *b2;  in pci_create_root_bus()  local
1938 	b = pci_alloc_bus(NULL);  in pci_create_root_bus()
1939 	if (!b)  in pci_create_root_bus()
1942 	b->sysdata = sysdata;  in pci_create_root_bus()
1943 	b->ops = ops;  in pci_create_root_bus()
1944 	b->number = b->busn_res.start = bus;  in pci_create_root_bus()
1945 	pci_bus_assign_domain_nr(b, parent);  in pci_create_root_bus()
1946 	b2 = pci_find_bus(pci_domain_nr(b), bus);  in pci_create_root_bus()
1953 	bridge = pci_alloc_host_bridge(b);  in pci_create_root_bus()
1959 	dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus);  in pci_create_root_bus()
1971 	b->bridge = get_device(&bridge->dev);  in pci_create_root_bus()
1972 	device_enable_async_suspend(b->bridge);  in pci_create_root_bus()
1973 	pci_set_bus_of_node(b);  in pci_create_root_bus()
1976 		set_dev_node(b->bridge, pcibus_to_node(b));  in pci_create_root_bus()
1978 	b->dev.class = &pcibus_class;  in pci_create_root_bus()
1979 	b->dev.parent = b->bridge;  in pci_create_root_bus()
1980 	dev_set_name(&b->dev, "%04x:%02x", pci_domain_nr(b), bus);  in pci_create_root_bus()
1981 	error = device_register(&b->dev);  in pci_create_root_bus()
1985 	pcibios_add_bus(b);  in pci_create_root_bus()
1988 	pci_create_legacy_files(b);  in pci_create_root_bus()
1991 		dev_info(parent, "PCI host bridge to bus %s\n", dev_name(&b->dev));  in pci_create_root_bus()
1993 		printk(KERN_INFO "PCI host bridge to bus %s\n", dev_name(&b->dev));  in pci_create_root_bus()
2001 			pci_bus_insert_busn_res(b, bus, res->end);  in pci_create_root_bus()
2003 			pci_bus_add_resource(b, res, 0);  in pci_create_root_bus()
2014 		dev_info(&b->dev, "root bus resource %pR%s\n", res, bus_addr);  in pci_create_root_bus()
2018 	list_add_tail(&b->node, &pci_root_buses);  in pci_create_root_bus()
2021 	return b;  in pci_create_root_bus()
2027 	kfree(b);  in pci_create_root_bus()
2032 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int bus_max)  in pci_bus_insert_busn_res()  argument
2034 	struct resource *res = &b->busn_res;  in pci_bus_insert_busn_res()
2041 	if (!pci_is_root_bus(b))  in pci_bus_insert_busn_res()
2042 		parent_res = &b->parent->busn_res;  in pci_bus_insert_busn_res()
2044 		parent_res = get_pci_domain_busn_res(pci_domain_nr(b));  in pci_bus_insert_busn_res()
2051 		dev_printk(KERN_DEBUG, &b->dev,  in pci_bus_insert_busn_res()
2053 			    res, pci_is_root_bus(b) ? "domain " : "",  in pci_bus_insert_busn_res()
2059 int pci_bus_update_busn_res_end(struct pci_bus *b, int bus_max)  in pci_bus_update_busn_res_end()  argument
2061 	struct resource *res = &b->busn_res;  in pci_bus_update_busn_res_end()
2071 	dev_printk(KERN_DEBUG, &b->dev,  in pci_bus_update_busn_res_end()
2076 		pci_bus_insert_busn_res(b, res->start, res->end);  in pci_bus_update_busn_res_end()
2081 void pci_bus_release_busn_res(struct pci_bus *b)  in pci_bus_release_busn_res()  argument
2083 	struct resource *res = &b->busn_res;  in pci_bus_release_busn_res()
2090 	dev_printk(KERN_DEBUG, &b->dev,  in pci_bus_release_busn_res()
2100 	struct pci_bus *b;  in pci_scan_root_bus()  local
2109 	b = pci_create_root_bus(parent, bus, ops, sysdata, resources);  in pci_scan_root_bus()
2110 	if (!b)  in pci_scan_root_bus()
2114 		dev_info(&b->dev,  in pci_scan_root_bus()
2117 		pci_bus_insert_busn_res(b, bus, 255);  in pci_scan_root_bus()
2120 	max = pci_scan_child_bus(b);  in pci_scan_root_bus()
2123 		pci_bus_update_busn_res_end(b, max);  in pci_scan_root_bus()
2125 	return b;  in pci_scan_root_bus()
2134 	struct pci_bus *b;  in pci_scan_bus_parented()  local
2139 	b = pci_create_root_bus(parent, bus, ops, sysdata, &resources);  in pci_scan_bus_parented()
2140 	if (b)  in pci_scan_bus_parented()
2141 		pci_scan_child_bus(b);  in pci_scan_bus_parented()
2144 	return b;  in pci_scan_bus_parented()
2152 	struct pci_bus *b;  in pci_scan_bus()  local
2157 	b = pci_create_root_bus(NULL, bus, ops, sysdata, &resources);  in pci_scan_bus()
2158 	if (b) {  in pci_scan_bus()
2159 		pci_scan_child_bus(b);  in pci_scan_bus()
2163 	return b;  in pci_scan_bus()
2235 	const struct pci_dev *b = to_pci_dev(d_b);  in pci_sort_bf_cmp()  local
2237 	if      (pci_domain_nr(a->bus) < pci_domain_nr(b->bus)) return -1;  in pci_sort_bf_cmp()
2238 	else if (pci_domain_nr(a->bus) > pci_domain_nr(b->bus)) return  1;  in pci_sort_bf_cmp()
2240 	if      (a->bus->number < b->bus->number) return -1;  in pci_sort_bf_cmp()
2241 	else if (a->bus->number > b->bus->number) return  1;  in pci_sort_bf_cmp()
2243 	if      (a->devfn < b->devfn) return -1;  in pci_sort_bf_cmp()
2244 	else if (a->devfn > b->devfn) return  1;  in pci_sort_bf_cmp()