typedef struct _MMMOD_WRITER_MDL_ENTRY
{
     LIST_ENTRY Links;
     UINT64 u;
     PIRP Irp;
     ULONG u1;
     PMMPAGING_FILE PagingFile;
     PFILE_OBJECT File;
     PCONTROL_AREA ControlArea;
     PERESOURCE FileResource;
     LARGE_INTEGER WriteOffset;
     LARGE_INTEGER IssueTime;
     PMDL PointerMdl;
     MDL Mdl;
     ULONG Page[1];
} MMMOD_WRITER_MDL_ENTRY, *PMMMOD_WRITER_MDL_ENTRY;

Windows Vista Kernel Structures