--- a/src/hotspot/share/runtime/stubRoutines.cpp	Tue Aug 20 10:46:23 2019 +0200
+++ b/src/hotspot/share/runtime/stubRoutines.cpp	Tue Aug 20 10:11:53 2019 +0100
@@ -113,6 +113,9 @@
 
 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;