Function vm_map_entry_back

freebsd/vm/vm_map.c:2375–2389

* vm_map_entry_back: * * Allocate an object to back a map entry. */

 *	Allocate an object to back a map entry.
 */
static inline void
vm_map_entry_back(vm_map_entry_t entry)
{
	vm_object_t object;

	KASSERT(entry->object.vm_object == NULL,
	    ("map entry %p has backing object", entry));
	KASSERT((entry->eflags & MAP_ENTRY_IS_SUB_MAP) == 0,
	    ("map entry %p is a submap", entry));
	object = vm_object_allocate_anon(atop(entry->end - entry->start), NULL,
	    entry->cred, entry->end - entry->start);
	entry->object.vm_object = object;
	entry->offset = 0;
	entry->cred = NULL;
}

/*
 *	vm_map_entry_charge_object