--- old/src/os_cpu/linux_zero/vm/os_linux_zero.cpp	2018-01-24 21:13:47.188909129 -0500
+++ new/src/os_cpu/linux_zero/vm/os_linux_zero.cpp	2018-01-24 21:13:47.137909132 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2007, 2008, 2009, 2010 Red Hat, Inc.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -360,7 +360,7 @@
   // The initial thread has a growable stack, and the size reported
   // by pthread_attr_getstack is the maximum size it could possibly
   // be given what currently mapped.  This can be huge, so we cap it.
-  if (os::Linux::is_initial_thread()) {
+  if (os::is_primordial_thread()) {
     stack_bytes = stack_top - stack_bottom;
 
     if (stack_bytes > JavaThread::stack_size_at_create())