--- old/src/share/vm/runtime/os.hpp	2013-01-18 11:37:37.389312000 -0800
+++ new/src/share/vm/runtime/os.hpp	2013-01-18 11:37:37.316310000 -0800
@@ -782,6 +782,9 @@
   // ResumeThread call)
   static void pause();
 
+  // Deallocate in-RAM pages without unmapping them.
+  static void deallocate_pages(void* addr, size_t size);
+
  protected:
   static long _rand_seed;                   // seed for random number generator
   static int _processor_count;              // number of processors