diff -r 23e3ab980622 -r 9b7b9f16dfd9 src/hotspot/share/classfile/javaClasses.cpp
--- a/src/hotspot/share/classfile/javaClasses.cpp	Tue Aug 20 10:46:23 2019 +0200
+++ b/src/hotspot/share/classfile/javaClasses.cpp	Tue Aug 20 10:11:53 2019 +0100
@@ -64,6 +64,7 @@
 #include "runtime/safepointVerifiers.hpp"
 #include "runtime/thread.inline.hpp"
 #include "runtime/vframe.inline.hpp"
+#include "runtime/vm_version.hpp"
 #include "utilities/align.hpp"
 #include "utilities/preserveException.hpp"
 #include "utilities/utf8.hpp"
@@ -4034,6 +4035,7 @@
   int _page_size;
   bool _big_endian;
   bool _use_unaligned_access;
+  int _data_cache_line_flush_size;
 public:
   UnsafeConstantsFixup() {
     // round up values for all static final fields
@@ -4041,6 +4043,7 @@
     _page_size = os::vm_page_size();
     _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
     _use_unaligned_access = UseUnalignedAccesses;
+    _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
   }
 
   void do_field(fieldDescriptor* fd) {
@@ -4057,6 +4060,8 @@
       mirror->bool_field_put(fd->offset(), _big_endian);
     } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
       mirror->bool_field_put(fd->offset(), _use_unaligned_access);
+    } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
+      mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
     } else {
       assert(false, "unexpected UnsafeConstants field");
     }