--- a/hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp	Fri Jan 20 18:01:32 2012 +0100
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp	Mon Jan 23 20:36:16 2012 +0100
@@ -799,7 +799,7 @@
 
   GenRemSet::Name  rem_set_name()     { return GenRemSet::CardTable; }
 
-  bool need_to_start_conc_mark(const char* source);
+  bool need_to_start_conc_mark(const char* source, size_t alloc_word_size = 0);
 
   // Update the heuristic info to record a collection pause of the given
   // start time, where the given number of bytes were used at the start.