+# ifdef CMM_SANITIZE_THREAD
+/*
+ * This makes TSAN quiet about unsupported thread fence.
+ */
+static inline void _cmm_thread_fence_wrapper(void)
+{
+# if defined(__clang__)
+# pragma clang diagnostic push
+# pragma clang diagnostic ignored "-Wpragmas"
+# pragma clang diagnostic ignored "-Wunknown-warning-option"
+# pragma clang diagnostic ignored "-Wtsan"
+# elif defined(__GNUC__)
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wpragmas"
+# pragma GCC diagnostic ignored "-Wtsan"
+# endif
+ __atomic_thread_fence(__ATOMIC_SEQ_CST);
+# if defined(__clang__)
+# pragma clang diagnostic pop
+# elif defined(__GNUC__)
+# pragma GCC diagnostic pop
+# endif
+}
+# endif /* CMM_SANITIZE_THREAD */
+