--- a/hotspot/src/share/vm/c1/c1_LIRGenerator.cpp	Fri May 22 13:35:29 2015 +0200
+++ b/hotspot/src/share/vm/c1/c1_LIRGenerator.cpp	Mon May 25 09:28:47 2015 +0200
@@ -1469,7 +1469,9 @@
   } else {
     guarantee(in_bytes(PtrQueue::byte_width_of_active()) == 1,
               "Assumption");
-    flag_type = T_BYTE;
+    // Use unsigned type T_BOOLEAN here rather than signed T_BYTE since some platforms, eg. ARM,
+    // need to use unsigned instructions to use the large offset to load the satb_mark_queue.
+    flag_type = T_BOOLEAN;
   }
   LIR_Opr thrd = getThreadPointer();
   LIR_Address* mark_active_flag_addr =