- struct lttng_channel *chan = event_enabler->chan;
- struct lttng_session *session = event_enabler->chan->session;
- struct lttng_enabler *base_enabler = lttng_event_enabler_as_enabler(event_enabler);
- struct lttng_event *event;
-
- if (base_enabler->event_param.instrumentation == LTTNG_KERNEL_SYSCALL &&
- base_enabler->event_param.u.syscall.abi == LTTNG_KERNEL_SYSCALL_ABI_ALL &&
- base_enabler->event_param.u.syscall.match == LTTNG_KERNEL_SYSCALL_MATCH_NAME &&
- !strcmp(base_enabler->event_param.name, "*")) {
- int enabled = base_enabler->enabled;
- enum lttng_kernel_syscall_entryexit entryexit = base_enabler->event_param.u.syscall.entryexit;
-
- if (entryexit == LTTNG_KERNEL_SYSCALL_ENTRY || entryexit == LTTNG_KERNEL_SYSCALL_ENTRYEXIT)
- WRITE_ONCE(chan->syscall_all_entry, enabled);
-
- if (entryexit == LTTNG_KERNEL_SYSCALL_EXIT || entryexit == LTTNG_KERNEL_SYSCALL_ENTRYEXIT)
- WRITE_ONCE(chan->syscall_all_exit, enabled);
- }
-
- /* First ensure that probe events are created for this enabler. */
- lttng_create_event_if_missing(event_enabler);
-
- /* For each event matching event_enabler in session event list. */
- list_for_each_entry(event, &session->events, list) {
- struct lttng_enabler_ref *enabler_ref;
-
- if (!lttng_event_enabler_match_event(event_enabler, event))
- continue;
- enabler_ref = lttng_enabler_ref(&event->enablers_ref_head,
- lttng_event_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_enabler_as_enabler(event_enabler);
- list_add(&enabler_ref->node,
- &event->enablers_ref_head);
- }
-
- /*
- * Link filter bytecodes if not linked yet.
- */
- lttng_enabler_link_bytecode(event->desc,
- lttng_static_ctx,
- &event->filter_bytecode_runtime_head,
- <tng_event_enabler_as_enabler(event_enabler)->filter_bytecode_head);
-
- /* TODO: merge event context. */
- }
- return 0;