040000 tree c528d4f3d1c02672543681cf4d551aa9d0087cc2	Data-Structures
040000 tree e37a9e3d84dff57d3913d0e183692f526ff2c19c	Expedited-Grace-Periods
040000 tree ef60772c4a2c73b57496356ab635fffd29db4cb3	Memory-Ordering
040000 tree 8882769756e5de3f045ee94f8614c15815d78e67	Requirements