- lttng_create_event_if_missing(&event_enabler->parent);
-
- /* For each event matching event_enabler in session event list. */
- list_for_each_entry(event_recorder_priv, event_list_head, parent.node) {
- struct lttng_kernel_event_recorder *event_recorder = event_recorder_priv->pub;
- struct lttng_enabler_ref *enabler_ref;
-
- if (!lttng_event_enabler_match_event(&event_enabler->parent, &event_recorder->parent))
- continue;
- enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head,
- lttng_event_recorder_enabler_as_enabler(event_enabler));
- if (!enabler_ref) {
- /*
- * If no backward ref, create it.
- * Add backward ref from event to event_enabler.
- */
- enabler_ref = kzalloc(sizeof(*enabler_ref), GFP_KERNEL);
- if (!enabler_ref)
- return -ENOMEM;
- enabler_ref->ref = lttng_event_recorder_enabler_as_enabler(event_enabler);
- list_add(&enabler_ref->node,
- &event_recorder_priv->parent.enablers_ref_head);
- }