VOID
KiOutSwapKernelStacks(
  IN  KIRQL PreviousIrql
  );

Routine Description:

    This function attempts to out swap the kernel stack for threads whose
    wait mode is user and which have been waiting longer than the stack
    protect time.

    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.