trace_event_trigger_enable_disable
extern int trace_event_trigger_enable_disable(struct trace_event_file *file,
trace_event_trigger_enable_disable(file, 1);
trace_event_trigger_enable_disable(file, 0);
if (trace_event_trigger_enable_disable(file, 1) < 0) {
trace_event_trigger_enable_disable(file, 0);
trace_event_trigger_enable_disable(file, 0);
trace_event_trigger_enable_disable(file, 0);
ret = trace_event_trigger_enable_disable(file, 1);
trace_event_trigger_enable_disable(file, 0);
trace_event_trigger_enable_disable(file, 0);
ret = trace_event_trigger_enable_disable(file, 1);
trace_event_trigger_enable_disable(file, 0);