pci_memlist_dup
extern struct memlist *pci_memlist_dup(struct memlist *);
scratch_list = pci_memlist_dup(pci_bus_res[secbus].io_avail);
scratch_list = pci_memlist_dup(pci_bus_res[secbus].mem_avail);
pci_memlist_dup(bootops->boot_mem->pcimem);