MTRR_TYPE_WB
|| mtrrp->type > MTRR_TYPE_WB) && (mtrrp->flags & MTRR_VALID))
if ((type1 == MTRR_TYPE_WT && type2 == MTRR_TYPE_WB) ||
(type1 == MTRR_TYPE_WB && type2 == MTRR_TYPE_WT))