const runtime.waitReasonZero

4 uses

	runtime (current package)
		proc.go#L3879: 	gp.waitreason = waitReasonZero
		runtime2.go#L1058: 	waitReasonZero                  waitReason = iota // ""
		runtime2.go#L1093: 	waitReasonZero:                  "",
		traceback.go#L1200: 	if gpstatus == _Gwaiting && gp.waitreason != waitReasonZero {