--- IO-AIO/AIO.xs	2006/10/23 23:48:31	1.63
+++ IO-AIO/AIO.xs	2006/10/23 23:54:41	1.64
@@ -209,9 +209,13 @@
   while (nreqs)
     {
       aio_req req;
+#if !(__x86 || __x86_64) /* safe without sempahore on this archs */
       pthread_mutex_lock (&reslock);
+#endif
       req = ress;
+#if !(__x86 || __x86_64) /* safe without sempahore on this archs */
       pthread_mutex_unlock (&reslock);
+#endif
 
       if (req)
         return;