VOID TdiMapBuffer( IN PMDL MdlChain ); Routine Description: This routine ensures that the MappedSystemVa field of every MDL in an MDL chain is valid; calling MmMapLockedPages where necessary. !!! This routine no longer does anything, and should be removed! Arguments: MdlChain - Pointer to a chain of MDLs describing the data to be mapped. Return Value: none.