diff -r f5e6ef11d24b -r ac8da6513351 hotspot/src/share/vm/gc/g1/heapRegionManager.inline.hpp
--- a/hotspot/src/share/vm/gc/g1/heapRegionManager.inline.hpp	Fri Nov 06 09:58:06 2015 -0800
+++ b/hotspot/src/share/vm/gc/g1/heapRegionManager.inline.hpp	Mon Nov 09 09:19:39 2015 +0100
@@ -47,6 +47,18 @@
   return hr;
 }
 
+inline HeapRegion* HeapRegionManager::next_region_in_humongous(HeapRegion* hr) const {
+  uint index = hr->hrm_index();
+  assert(is_available(index), "pre-condition");
+  assert(hr->is_humongous(), "next_region_in_humongous should only be called for a humongous region.");
+  index++;
+  if (index < max_length() && is_available(index) && at(index)->is_continues_humongous()) {
+    return at(index);
+  } else {
+    return NULL;
+  }
+}
+
 inline void HeapRegionManager::insert_into_free_list(HeapRegion* hr) {
   _free_list.add_ordered(hr);
 }