const runtime.traceFutileWakeup

3 uses

	runtime (current package)
		trace.go#L106: 	traceFutileWakeup byte = 128
		trace.go#L1109: 	if traceEv&traceFutileWakeup != 0 {
		trace.go#L1112: 	traceEvent(traceEv & ^traceFutileWakeup, skip)