040000 tree bd3ac2c697ac6bb8ff2b3659fbfbd4ea4ce09987	Data-Structures
040000 tree c1a09446a80e9e057fd985509f8271e983c25f62	Expedited-Grace-Periods
040000 tree 3657114d7ba10e0d3f6e9948476daac5af908217	Memory-Ordering
040000 tree 70ce8f11b581f993ce7f00c096341a429111bc5f	Requirements