struct MMPTE_LIST

typedef struct _MMPTE_LIST
{
     ULONG Valid: 1;
     ULONG OneEntry: 1;
     ULONG filler0: 8;
     ULONG Prototype: 1;
     ULONG filler1: 21;
     ULONG NextEntry: 32;
} MMPTE_LIST, *PMMPTE_LIST;

Windows Vista Kernel Structures