diff -r fcad92f425c5 -r 56bf71d64d51 src/hotspot/os_cpu/linux_aarch64/orderAccess_linux_aarch64.hpp
--- a/src/hotspot/os_cpu/linux_aarch64/orderAccess_linux_aarch64.hpp	Mon Nov 25 14:06:13 2019 +0100
+++ b/src/hotspot/os_cpu/linux_aarch64/orderAccess_linux_aarch64.hpp	Mon Nov 25 12:22:13 2019 +0100
@@ -37,6 +37,10 @@
 inline void OrderAccess::loadstore()  { acquire(); }
 inline void OrderAccess::storeload()  { fence(); }
 
+#define FULL_MEM_BARRIER  __sync_synchronize()
+#define READ_MEM_BARRIER  __atomic_thread_fence(__ATOMIC_ACQUIRE);
+#define WRITE_MEM_BARRIER __atomic_thread_fence(__ATOMIC_RELEASE);
+
 inline void OrderAccess::acquire() {
   READ_MEM_BARRIER;
 }
@@ -51,25 +55,4 @@
 
 inline void OrderAccess::cross_modify_fence() { }
 
-template<size_t byte_size>
-struct OrderAccess::PlatformOrderedLoad<byte_size, X_ACQUIRE>
-{
-  template <typename T>
-  T operator()(const volatile T* p) const { T data; __atomic_load(const_cast<T*>(p), &data, __ATOMIC_ACQUIRE); return data; }
-};
-
-template<size_t byte_size>
-struct OrderAccess::PlatformOrderedStore<byte_size, RELEASE_X>
-{
-  template <typename T>
-  void operator()(T v, volatile T* p) const { __atomic_store(const_cast<T*>(p), &v, __ATOMIC_RELEASE); }
-};
-
-template<size_t byte_size>
-struct OrderAccess::PlatformOrderedStore<byte_size, RELEASE_X_FENCE>
-{
-  template <typename T>
-  void operator()(T v, volatile T* p) const { release_store(p, v); fence(); }
-};
-
 #endif // OS_CPU_LINUX_AARCH64_ORDERACCESS_LINUX_AARCH64_HPP