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, 3 insertions, 3 deletions

diff --git a/drivers/net/ethernet/brocade/bna/bnad.c b/drivers/net/ethernet/brocade/bna/bnad.c
index 2f4ced66612a..5d7872ecff52 100644
--- a/drivers/net/ethernet/brocade/bna/bnad.c
+++ b/drivers/net/ethernet/brocade/bna/bnad.c
@@ -116,7 +116,7 @@ bnad_pci_unmap_skb(struct device *pdev, struct bnad_skb_unmap *array,
 
         for (j = 0; j < frag; j++) {
                 dma_unmap_page(pdev, dma_unmap_addr(&array[index], dma_addr),
-                          skb_shinfo(skb)->frags[j].size, DMA_TO_DEVICE);
+                          skb_frag_size(&skb_shinfo(skb)->frags[j]), DMA_TO_DEVICE);
                 dma_unmap_addr_set(&array[index], dma_addr, 0);
                 BNA_QE_INDX_ADD(index, 1, depth);
         }
@@ -2741,8 +2741,8 @@ bnad_start_xmit(struct sk_buff *skb, struct net_device *netdev)
         wis_used = 1;
 
         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
-                struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
-                u16             size = frag->size;
+                const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
+                u16             size = skb_frag_size(frag);
 
                 if (unlikely(size == 0)) {
                         unmap_prod = unmap_q->producer_index;