FROM_XFER_BUF
&sg, &offset, FROM_XFER_BUF);
&sg, &sg_offset, FROM_XFER_BUF);
&sg, &sg_offset, FROM_XFER_BUF);
sg_miter_start(&miter, sg, nents, dir == FROM_XFER_BUF ?
if (dir == FROM_XFER_BUF)
&sg, &offset, FROM_XFER_BUF);
&sg, &offset, FROM_XFER_BUF);
&sg, &sg_offset, FROM_XFER_BUF);
&offset, FROM_XFER_BUF) ==