VOID
KiInSwapKernelStacks(
  IN  KIRQL PreviousIrql
  );

Routine Description:

    This function in swaps the kernel stack for threads whose wait has been
    completed and whose kernel stack is nonresident.

    N.B. The dispatcher data lock is held on entry to this routine and must
         be help on exit to this routine.

Arguments:

    PreviousIrql - Supplies the previous IRQL.

Return Value:

    None.