pci_bus_resource_n
EXPORT_SYMBOL_GPL(pci_bus_resource_n);
win = pci_bus_resource_n(bus, PCI_BUS_BRIDGE_IO_WINDOW);
mmio = pci_bus_resource_n(bus, PCI_BUS_BRIDGE_MEM_WINDOW);
mmio_pref = pci_bus_resource_n(bus, PCI_BUS_BRIDGE_PREF_MEM_WINDOW);
struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
(res = pci_bus_resource_n(bus, __b)) || __b < PCI_BRIDGE_RESOURCE_NUM; \
(res = pci_bus_resource_n(bus, __b)) || __b < PCI_BRIDGE_RESOURCE_NUM; \