Index: mysql-5.7.4-m14/mysys/thr_mutex.c
===================================================================
--- mysql-5.7.4-m14.orig/mysys/thr_mutex.c
+++ mysql-5.7.4-m14/mysys/thr_mutex.c
@@ -333,12 +333,15 @@ void safe_mutex_end(FILE *file __attribu
 ulong mutex_delay(ulong delayloops)
 {
   ulong	i;
-  volatile ulong j;
+  ulong j;
 
   j = 0;
 
   for (i = 0; i < delayloops * 50; i++)
+  {
     j += i;
+    asm volatile("":::"memory");
+  }
 
   return(j); 
 }