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//0x4 bytes (sizeof)
union _KPRCBFLAG
{
    volatile LONG PrcbFlags;                                                //0x0
    ULONG BamQosLevel:2;                                                    //0x0
    ULONG PendingQosUpdate:2;                                               //0x0
    ULONG CacheIsolationEnabled:1;                                          //0x0
    ULONG PrcbFlagsReserved:27;                                             //0x0
};