uvm_map_mkentry
entry = uvm_map_mkentry(map, first, last, *addr, sz, flags, &dead,
struct vm_map_entry *uvm_map_mkentry(struct vm_map*, struct vm_map_entry*,
new_entry = uvm_map_mkentry(dstmap, first, last,
entry = uvm_map_mkentry(map, first, last, *addr, sz, flags, &dead,