const sync.mutexWaiterShift

8 uses

	sync (current package)
		mutex.go#L40: 	mutexWaiterShift = iota
		mutex.go#L121: 			if !awoke && old&mutexWoken == 0 && old>>mutexWaiterShift != 0 &&
		mutex.go#L136: 			new += 1 << mutexWaiterShift
		mutex.go#L170: 				if old&(mutexLocked|mutexWoken) != 0 || old>>mutexWaiterShift == 0 {
		mutex.go#L173: 				delta := int32(mutexLocked - 1<<mutexWaiterShift)
		mutex.go#L174: 				if !starving || old>>mutexWaiterShift == 1 {
		mutex.go#L231: 			if old>>mutexWaiterShift == 0 || old&(mutexLocked|mutexWoken|mutexStarving) != 0 {
		mutex.go#L235: 			new = (old - 1<<mutexWaiterShift) | mutexWoken