_KLOCK_QUEUE_HANDLE

Windows 8.1 | Server 2012R2 Update 1
Windows 10 1507 (Original Release, Threshold 1)
Windows 10 1511 (November Update, Threshold 2)
//0x18 bytes (sizeof)
struct _KLOCK_QUEUE_HANDLE
{
    struct _KSPIN_LOCK_QUEUE LockQueue;                                     //0x0
    UCHAR OldIrql;                                                          //0x10
};