net: add skb frag size accessors

To ease skb->truesize sanitization, its better to be able to localize
all references to skb frags size.

Define accessors : skb_frag_size() to fetch frag size, and
skb_frag_size_{set|add|sub}() to manipulate it.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 5 deletions

diff --git a/drivers/net/ethernet/alteon/acenic.c b/drivers/net/ethernet/alteon/acenic.c
index b1a4e8204437..f872748ab4e6 100644
--- a/drivers/net/ethernet/alteon/acenic.c
+++ b/drivers/net/ethernet/alteon/acenic.c
@@ -2478,18 +2478,18 @@ restart:
                 idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap);
 
                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
-                        skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+                        const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
                         struct tx_ring_info *info;
 
-                        len += frag->size;
+                        len += skb_frag_size(frag);
                         info = ap->skb->tx_skbuff + idx;
                         desc = ap->tx_ring + idx;
 
                         mapping = skb_frag_dma_map(&ap->pdev->dev, frag, 0,
-                                                   frag->size,
+                                                   skb_frag_size(frag),
                                                    DMA_TO_DEVICE);
 
-                        flagsize = (frag->size << 16);
+                        flagsize = skb_frag_size(frag) << 16;
                         if (skb->ip_summed == CHECKSUM_PARTIAL)
                                 flagsize |= BD_FLG_TCP_UDP_SUM;
                         idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap);
@@ -2508,7 +2508,7 @@ restart:
                                 info->skb = NULL;
                         }
                         dma_unmap_addr_set(info, mapping, mapping);
-                        dma_unmap_len_set(info, maplen, frag->size);
+                        dma_unmap_len_set(info, maplen, skb_frag_size(frag));
                         ace_load_tx_bd(ap, desc, mapping, flagsize, vlan_tag);
                 }
         }