typedef struct _PI_RESOURCE_ARBITER_ENTRY
{
     LIST_ENTRY DeviceArbiterList;
     UCHAR ResourceType;
     PARBITER_INTERFACE ArbiterInterface;
     PDEVICE_NODE DeviceNode;
     LIST_ENTRY ResourceList;
     LIST_ENTRY BestResourceList;
     LIST_ENTRY BestConfig;
     LIST_ENTRY ActiveArbiterList;
     UCHAR State;
     UCHAR ResourcesChanged;
} PI_RESOURCE_ARBITER_ENTRY, *PPI_RESOURCE_ARBITER_ENTRY;

Windows Vista Kernel Structures