typedef struct _VI_DEADLOCK_NODE
{
     PVI_DEADLOCK_NODE Parent;
     LIST_ENTRY ChildrenList;
     LIST_ENTRY SiblingsList;
     union
     {
          LIST_ENTRY ResourceList;
          LIST_ENTRY FreeListEntry;
     };
     PVI_DEADLOCK_RESOURCE Root;
     PVI_DEADLOCK_THREAD ThreadEntry;
     ULONG u1;
     VOID * StackTrace[8];
     VOID * ParentStackTrace[8];
} VI_DEADLOCK_NODE, *PVI_DEADLOCK_NODE;

Windows Vista Kernel Structures