--- old/src/hotspot/share/runtime/os.hpp	2017-10-31 15:49:45.965688681 -0700
+++ new/src/hotspot/share/runtime/os.hpp	2017-10-31 15:49:45.690690765 -0700
@@ -109,11 +109,8 @@
 
   static char*  pd_reserve_memory(size_t bytes, char* addr = 0,
                                   size_t alignment_hint = 0);
-#if defined(AIX)
-  static char*  pd_attempt_reserve_memory_at(size_t bytes, char* addr, bool use_SHM = true);
-#else
   static char*  pd_attempt_reserve_memory_at(size_t bytes, char* addr);
-#endif
+  static char*  pd_attempt_reserve_memory_at(size_t bytes, char* addr, int file_desc);
   static void   pd_split_reserved_memory(char *base, size_t size,
                                       size_t split, bool realloc);
   static bool   pd_commit_memory(char* addr, size_t bytes, bool executable);