ExInterlockedFreeToZone

The ExInterlockedFreeToZone routine is exported to support existing driver binaries and is obsolete. Use lookaside lists instead. For more information, see Buffer Management.

PVOID 
  ExInterlockedFreeToZone(
    IN PZONE_HEADER  Zone,
    IN PVOID  Block,
    IN PKSPIN_LOCK  Lock
    );