// Must be called with a P.
//
// wakep should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
//   - gvisor.dev/gvisor
//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname wakep
func wakep() {
	// Be conservative about spinning threads, only start one if none exist