Index: mysql-5.7.4-m14/storage/innobase/os/os0file.cc
===================================================================
--- mysql-5.7.4-m14.orig/storage/innobase/os/os0file.cc
+++ mysql-5.7.4-m14/storage/innobase/os/os0file.cc
@@ -3741,7 +3741,7 @@ skip_native_aio:
 		slot->ret = 0;
 #endif /* WIN_ASYNC_IO */
 	}
-
+	__sync_synchronize();
 	return(array);
 }