diff -r 63eb7e38ce84 -r 9d1a788dea3d src/hotspot/cpu/s390/frame_s390.inline.hpp
--- a/src/hotspot/cpu/s390/frame_s390.inline.hpp	Tue Jan 29 14:34:26 2019 +0100
+++ b/src/hotspot/cpu/s390/frame_s390.inline.hpp	Tue Jan 29 14:43:05 2019 +0100
@@ -111,14 +111,6 @@
   return _fp;
 }
 
-// Return true if this frame is younger (more recent activation) than
-// the frame represented by id.
-inline bool frame::is_younger(intptr_t* id) const {
-  assert(this->id() != NULL && id != NULL, "NULL frame id");
-  // Stack grows towards smaller addresses on z/Architecture.
-  return this->id() < id;
-}
-
 // Return true if this frame is older (less recent activation) than
 // the frame represented by id.
 inline bool frame::is_older(intptr_t* id) const {