synth_event_add_next_val
extern int synth_event_add_next_val(u64 val,
ret = synth_event_add_next_val(777, &trace_state);
ret = synth_event_add_next_val((u64)(long)"slinky", &trace_state);
ret = synth_event_add_next_val(1000000, &trace_state);
ret = synth_event_add_next_val(1000, &trace_state);
ret = synth_event_add_next_val(raw_smp_processor_id(), &trace_state);
ret = synth_event_add_next_val((u64)(long)"thneed_2.01", &trace_state);
ret = synth_event_add_next_val(395, &trace_state);
EXPORT_SYMBOL_GPL(synth_event_add_next_val);