loopback: Remove rest of LOOPBACK_TSO code.

It hasn't been enabled for a long time and the generic GSO
engine is better documentation of what is expected of a
device implementing TSO.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index 46e87cc87251a0b471bf20d56757a432408f9436..489d53be2f5dd21b877602baa5a54955b3457e04 100644 (file)
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -64,68 +64,6 @@ struct pcpu_lstats {
        unsigned long bytes;
 };
 
-/* KISS: just allocate small chunks and copy bits.
- *
- * So, in fact, this is documentation, explaining what we expect
- * of largesending device modulo TCP checksum, which is ignored for loopback.
- */
-
-#ifdef LOOPBACK_TSO
-static void emulate_large_send_offload(struct sk_buff *skb)
-{
-       struct iphdr *iph = ip_hdr(skb);
-       struct tcphdr *th = (struct tcphdr *)(skb_network_header(skb) +
-                                             (iph->ihl * 4));
-       unsigned int doffset = (iph->ihl + th->doff) * 4;
-       unsigned int mtu = skb_shinfo(skb)->gso_size + doffset;
-       unsigned int offset = 0;
-       u32 seq = ntohl(th->seq);
-       u16 id  = ntohs(iph->id);
-
-       while (offset + doffset < skb->len) {
-               unsigned int frag_size = min(mtu, skb->len - offset) - doffset;
-               struct sk_buff *nskb = alloc_skb(mtu + 32, GFP_ATOMIC);
-
-               if (!nskb)
-                       break;
-               skb_reserve(nskb, 32);
-               skb_set_mac_header(nskb, -ETH_HLEN);
-               skb_reset_network_header(nskb);
-               iph = ip_hdr(nskb);
-               skb_copy_to_linear_data(nskb, skb_network_header(skb),
-                                       doffset);
-               if (skb_copy_bits(skb,
-                                 doffset + offset,
-                                 nskb->data + doffset,
-                                 frag_size))
-                       BUG();
-               skb_put(nskb, doffset + frag_size);
-               nskb->ip_summed = CHECKSUM_UNNECESSARY;
-               nskb->dev = skb->dev;
-               nskb->priority = skb->priority;
-               nskb->protocol = skb->protocol;
-               nskb->dst = dst_clone(skb->dst);
-               memcpy(nskb->cb, skb->cb, sizeof(skb->cb));
-               nskb->pkt_type = skb->pkt_type;
-
-               th = (struct tcphdr *)(skb_network_header(nskb) + iph->ihl * 4);
-               iph->tot_len = htons(frag_size + doffset);
-               iph->id = htons(id);
-               iph->check = 0;
-               iph->check = ip_fast_csum((unsigned char *) iph, iph->ihl);
-               th->seq = htonl(seq);
-               if (offset + doffset + frag_size < skb->len)
-                       th->fin = th->psh = 0;
-               netif_rx(nskb);
-               offset += frag_size;
-               seq += frag_size;
-               id++;
-       }
-
-       dev_kfree_skb(skb);
-}
-#endif /* LOOPBACK_TSO */
-
 /*
  * The higher levels take care of making this non-reentrant (it's
  * called with bh's disabled).