--- a/src/java.base/share/classes/sun/nio/ch/FileDispatcher.java	Fri Oct 20 11:08:18 2017 -0700
+++ b/src/java.base/share/classes/sun/nio/ch/FileDispatcher.java	Tue Oct 17 16:51:11 2017 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -61,4 +61,6 @@
     abstract boolean canTransferToDirectly(SelectableChannel sc);
 
     abstract boolean transferToDirectlyNeedsPositionLock();
+
+    abstract int setDirectIO(FileDescriptor fd, String path);
 }