VOID
KeReleaseInterruptSpinLock(
  IN  PKINTERRUPT Interrupt,
  IN  KIRQL OldIrql
  );

Routine Description:

    This function releases the actual spin lock associated with an interrupt
    object and lowers the IRQL to its previous value.

Arguments:

    Interrupt - Supplies a pointer to a control object of type interrupt.

    OldIrql - Supplies the previous IRQL value.

Return Value:

    None.