--- old/src/share/vm/gc_implementation/g1/concurrentMark.cpp	2011-09-20 15:11:34.745434647 -0700
+++ new/src/share/vm/gc_implementation/g1/concurrentMark.cpp	2011-09-20 15:11:34.507927250 -0700
@@ -4553,7 +4553,7 @@
                  G1PPRL_SUM_BYTE_FORMAT("region-size"),
                  g1_committed.start(), g1_committed.end(),
                  g1_reserved.start(), g1_reserved.end(),
-                 HeapRegion::GrainBytes);
+                 (size_t)HeapRegion::GrainBytes);
   _out->print_cr(G1PPRL_LINE_PREFIX);
   _out->print_cr(G1PPRL_LINE_PREFIX
                  G1PPRL_TYPE_H_FORMAT