vm_object_allocate_anon
dst_object = vm_object_allocate_anon(atop(dst_entry->end -
object = vm_object_allocate_anon(atop(entry->end - entry->start), NULL,
entry->object.vm_object = vm_object_allocate_anon(atop(size),
result = vm_object_allocate_anon(atop(length), source, cred);
new_object = vm_object_allocate_anon(size, orig_object, cred);
vm_object_t vm_object_allocate_anon(vm_pindex_t, vm_object_t, struct ucred *);