Function pmap_unwire_ptp

freebsd/mips/mips/pmap.c:992–1002

* Decrements a page table page's reference count, which is used to record the * number of valid page table entries within the page. If the reference count * drops to zero, then the page table page is unmapped. Returns TRUE if the * page table page was unmapped and FALSE otherwise. */

 * page table page was unmapped and FALSE otherwise.
 */
static PMAP_INLINE boolean_t
pmap_unwire_ptp(pmap_t pmap, vm_offset_t va, vm_page_t m)
{

	--m->ref_count;
	if (m->ref_count == 0) {
		_pmap_unwire_ptp(pmap, va, m);
		return (TRUE);
	} else
		return (FALSE);
}

static void
_pmap_unwire_ptp(pmap_t pmap, vm_offset_t va, vm_page_t m)