igb: move gso_segs into buffer_info structure

This change moves gso_segs into the buffer_info structure to avoid
a possible cache line miss in clean_tx_irq.

Signed-off-by: Nicholas Nunley <nicholasx.d.nunley@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index a1fe581febc0..91c123f9df92 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -3641,6 +3641,7 @@ static inline int igb_tx_map_adv(struct igb_ring *tx_ring, struct sk_buff *skb,
         }
 
         tx_ring->buffer_info[i].skb = skb;
+        tx_ring->buffer_info[i].gso_segs = skb_shinfo(skb)->gso_segs ?: 1;
         tx_ring->buffer_info[first].next_to_watch = i;
 
         return ++count;
@@ -5032,7 +5033,7 @@ static bool igb_clean_tx_irq(struct igb_q_vector *q_vector)
                         if (skb) {
                                 unsigned int segs, bytecount;
                                 /* gso_segs is currently only valid for tcp */
-                                segs = skb_shinfo(skb)->gso_segs ?: 1;
+                                segs = buffer_info->gso_segs;
                                 /* multiply data chunks by size of headers */
                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
                                             skb->len;