+ error_counter = CMM_LOAD_SHARED(event_notifier_group->error_counter);
+ /*
+ * load-acquire paired with store-release orders creation of the
+ * error counter and setting error_counter_len before the
+ * error_counter is used.
+ * Currently a full memory barrier is used, which could be
+ * turned into acquire-release barriers.
+ */
+ cmm_smp_mb();
+ /* This group may not have an error counter attached to it. */
+ if (!error_counter)
+ return;
+