Function vm_page_test_dirty

freebsd/vm/vm_page.c:5379–5386

* Set the page's dirty bits if the page is modified. */

 * Set the page's dirty bits if the page is modified.
 */
void
vm_page_test_dirty(vm_page_t m)
{

	vm_page_assert_busied(m);
	if (m->dirty != VM_PAGE_BITS_ALL && pmap_is_modified(m))
		vm_page_dirty(m);
}

void
vm_page_valid(vm_page_t m)