Function vm_page_next

freebsd/vm/vm_page.c:1791–1803

* Returns the given page's successor (by pindex) within the object if it is * resident; if none is found, NULL is returned. * * The object must be locked. */

 * The object must be locked.
 */
vm_page_t
vm_page_next(vm_page_t m)
{
	vm_page_t next;

	VM_OBJECT_ASSERT_LOCKED(m->object);
	if ((next = TAILQ_NEXT(m, listq)) != NULL) {
		MPASS(next->object == m->object);
		if (next->pindex != m->pindex + 1)
			next = NULL;
	}
	return (next);
}

/*
 * Returns the given page's predecessor (by pindex) within the object if it is