In the unlikely event that pmap_ts_referenced() demoted five superpage

mappings to the same underlying physical page, the calling thread would be
left forever pinned to the same processor.

MFC after:	3 days

sys/i386/i386/pmap.c

@@ -4540,7 +4540,7 @@ pmap_ts_referenced(vm_page_t m)
 					rtval++;
 					if (rtval > 4) {
 						PMAP_UNLOCK(pmap);
-						return (rtval);
+						goto out;
 					}
 				}
 			}
@@ -4569,6 +4569,7 @@ pmap_ts_referenced(vm_page_t m)
 			PMAP_UNLOCK(pmap);
 		} while ((pv = pvn) != NULL && pv != pvf);
 	}
+out:
 	sched_unpin();
 	return (rtval);
 }