// pidleget may clear the mask before pidleput sets the mask,
	// corrupting the bitmap.
	//
	// N.B., procresize takes ownership of all Ps in stopTheWorldWithSema.
	idlepMask pMask

	// Bitmask of Ps that may have a timer, one bit per P. Reads and writes
	// must be atomic. Length may change at safe points.
	//
	// Ideally, the timer mask would be kept immediately consistent on any timer

	}
	return gp
}

// pMask is an atomic bitstring with one bit per P.
type pMask []uint32

// read returns true if P id's bit is set.
func (p pMask) read(id uint32) bool {
	word := id / 32
	mask := uint32(1) << (id % 32)
	return (atomic.Load(&p[word]) & mask) != 0
}

// set sets P id's bit.
func (p pMask) set(id int32) {
	word := id / 32