struct MMVAD_SHORT

typedef struct _MMVAD_SHORT
{
     ULONG u1;
     PMMVAD LeftChild;
     PMMVAD RightChild;
     ULONG StartingVpn;
     ULONG EndingVpn;
     ULONG u;
     EX_PUSH_LOCK PushLock;
     ULONG u5;
} MMVAD_SHORT, *PMMVAD_SHORT;

Windows Vista Kernel Structures