Put `#ifdef notyet' around some code which is currently defunct.

sys/vm/vm_glue.c

@@ -96,9 +96,11 @@ kernacc(addr, len, rw)
 	 * or worse, inconsistencies at the pmap level.  We only worry
 	 * about the buffer cache for now.
 	 */
+#ifdef notyet
 	if (!readbuffers && rv && (eaddr > (vm_offset_t)buffers &&
 		   saddr < (vm_offset_t)buffers + MAXBSIZE * nbuf))
 		rv = FALSE;
+#endif
 	return(rv == TRUE);
 }