5042 stop using deprecated atomic functions

@@ -838,11 +838,11 @@
                  */
                 curthread->t_red_pp = red_pp;
 
                 atomic_add_32(&red_nmapped, 1);
                 while (fp - (uintptr_t)curthread->t_stkbase < red_closest) {
-                        (void) cas32(&red_closest, red_closest,
+                        (void) atomic_cas_32(&red_closest, red_closest,
                             (uint32_t)(fp - (uintptr_t)curthread->t_stkbase));
                 }
                 return (1);
         }