typedef struct _VI_DEADLOCK_THREAD
{
     PKTHREAD Thread;
     PVI_DEADLOCK_NODE CurrentSpinNode;
     PVI_DEADLOCK_NODE CurrentOtherNode;
     union
     {
          LIST_ENTRY ListEntry;
          LIST_ENTRY FreeListEntry;
     };
     ULONG NodeCount;
     ULONG PagingCount;
} VI_DEADLOCK_THREAD, *PVI_DEADLOCK_THREAD;

Windows Vista Kernel Structures