OBJPC_INVAL
pagerflags = (flags & (OBJPC_SYNC | OBJPC_INVAL)) != 0 ?
pagerflags |= (flags & OBJPC_INVAL) != 0 ? VM_PAGER_PUT_INVAL : 0;
flags |= invalidate ? (OBJPC_SYNC | OBJPC_INVAL) : 0;