diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 21204a009ec..5e4b726ae82 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2011-05-21  Nick Clifton  <nickc@redhat.com>
+
+	PR target/49098
+	* config/rx/rx.c (rx_memory_move_cost): Note unused parameters.
+
 2011-05-21  Nicola Pero  <nicola.pero@meta-innovation.com>
 
 	* gengtype.c (walk_type): Implemented "atomic" GTY option.
diff --git a/gcc/config/rx/rx.c b/gcc/config/rx/rx.c
index 6b0ca2e9333..685a261967e 100644
--- a/gcc/config/rx/rx.c
+++ b/gcc/config/rx/rx.c
@@ -2636,7 +2636,9 @@ rx_trampoline_init (rtx tramp, tree fndecl, rtx chain)
 }
 
 static int
-rx_memory_move_cost (enum machine_mode mode, reg_class_t regclass, bool in)
+rx_memory_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED,
+		     reg_class_t regclass ATTRIBUTE_UNUSED,
+		     bool in)
 {
   return (in ? 2 : 0) + REGISTER_MOVE_COST (mode, regclass, regclass);
 }