SGE_RX_OFFSET
sge->rx_pkt_pad = t1_is_T1B(sge->obj) ? 0 : SGE_RX_OFFSET;
sge->rx_offset = t1_is_T1B(sge->obj) ? SGE_RX_OFFSET: 0;
SGE_RX_OFFSET - sge->rx_pkt_pad;
(skb = allocb(len + SGE_RX_OFFSET, BPRI_HI))))
(skb = allocb(len + SGE_RX_OFFSET, BPRI_HI)))
skb_reserve(skb, SGE_RX_OFFSET);
__skb_pull(skb, SGE_RX_OFFSET);