HFI_BUFFERFLAG_READONLY
if (buf->flags & HFI_BUFFERFLAG_READONLY)
buf->flags &= ~HFI_BUFFERFLAG_READONLY;
buf->flags |= HFI_BUFFERFLAG_READONLY;
if (buf->flags & HFI_BUFFERFLAG_READONLY) {
if (hfi_flags & HFI_BUFFERFLAG_READONLY)