diff -r 3315e47741c7 -r 6e99148dbf33 src/hotspot/share/code/codeCache.hpp
--- a/src/hotspot/share/code/codeCache.hpp	Thu Nov 08 15:31:23 2018 +0100
+++ b/src/hotspot/share/code/codeCache.hpp	Thu Nov 08 15:02:50 2018 +0100
@@ -192,7 +192,7 @@
     }
   };
   static void do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred);
-  static uint16_t unloading_cycle() { return _unloading_cycle; }
+  static uint8_t unloading_cycle() { return _unloading_cycle; }
   static void increment_unloading_cycle();
   static void asserted_non_scavengable_nmethods_do(CodeBlobClosure* f = NULL) PRODUCT_RETURN;
   static void release_exception_cache(ExceptionCache* entry);