--- old/src/hotspot/share/runtime/stubRoutines.cpp	2018-07-19 11:58:51.626283515 +0100
+++ new/src/hotspot/share/runtime/stubRoutines.cpp	2018-07-19 11:58:51.355282699 +0100
@@ -109,6 +109,9 @@
 
 address StubRoutines::_zero_aligned_words = CAST_FROM_FN_PTR(address, Copy::zero_to_words);
 
+address StubRoutines::_data_cache_writeback              = NULL;
+address StubRoutines::_data_cache_writeback_sync         = NULL;
+
 address StubRoutines::_checkcast_arraycopy               = NULL;
 address StubRoutines::_checkcast_arraycopy_uninit        = NULL;
 address StubRoutines::_unsafe_arraycopy                  = NULL;