[TCP]: Convert highest_sack to sk_buff to allow direct access

It is going to replace the sack fastpath hint quite soon... :-)

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index bac17c59b24e..34acee662230 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -332,8 +332,10 @@ struct tcp_sock {
 
         struct tcp_sack_block_wire recv_sack_cache[4];
 
-        u32     highest_sack;   /* Start seq of globally highest revd SACK
-                                 * (validity guaranteed only if sacked_out > 0) */
+        struct sk_buff *highest_sack;   /* highest skb with SACK received
+                                         * (validity guaranteed only if
+                                         * sacked_out > 0)
+                                         */
 
         /* from STCP, retrans queue hinting */
         struct sk_buff* lost_skb_hint;