--- a/hotspot/src/share/vm/runtime/os.hpp	Wed Mar 09 09:45:47 2016 +0100
+++ b/hotspot/src/share/vm/runtime/os.hpp	Wed Mar 09 09:56:10 2016 +0100
@@ -325,7 +325,7 @@
   // to make the OS back the memory range with actual memory.
   // Current implementation may not touch the last page if unaligned addresses
   // are passed.
-  static void   pretouch_memory(char* start, char* end);
+  static void   pretouch_memory(void* start, void* end);
 
   enum ProtType { MEM_PROT_NONE, MEM_PROT_READ, MEM_PROT_RW, MEM_PROT_RWX };
   static bool   protect_memory(char* addr, size_t bytes, ProtType prot,