static struct pci_bus *rpaphp_find_pci_bus(struct device_node *dn)
struct pci_bus *rpaphp_find_pci_bus(struct device_node *dn)
static struct pci_bus *rpaphp_find_pci_bus(struct device_node *dn){	if (!dn->phb || !dn->phb->bus)		return NULL;	return find_bus_among_children(dn->phb->bus, dn);}