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, 4 insertions, 4 deletions

diff --git a/drivers/net/ethernet/adaptec/starfire.c b/drivers/net/ethernet/adaptec/starfire.c
index d6b015598569..6d9f6911000f 100644
--- a/drivers/net/ethernet/adaptec/starfire.c
+++ b/drivers/net/ethernet/adaptec/starfire.c
@@ -1256,12 +1256,12 @@ static netdev_tx_t start_tx(struct sk_buff *skb, struct net_device *dev)
                         np->tx_info[entry].mapping =
                                 pci_map_single(np->pci_dev, skb->data, skb_first_frag_len(skb), PCI_DMA_TODEVICE);
                 } else {
-                        skb_frag_t *this_frag = &skb_shinfo(skb)->frags[i - 1];
-                        status |= this_frag->size;
+                        const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[i - 1];
+                        status |= skb_frag_size(this_frag);
                         np->tx_info[entry].mapping =
                                 pci_map_single(np->pci_dev,
                                                skb_frag_address(this_frag),
-                                               this_frag->size,
+                                               skb_frag_size(this_frag),
                                                PCI_DMA_TODEVICE);
                 }
 
@@ -1378,7 +1378,7 @@ static irqreturn_t intr_handler(int irq, void *dev_instance)
                                         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
                                                 pci_unmap_single(np->pci_dev,
                                                                  np->tx_info[entry].mapping,
-                                                                 skb_shinfo(skb)->frags[i].size,
+                                                                 skb_frag_size(&skb_shinfo(skb)->frags[i]),
                                                                  PCI_DMA_TODEVICE);
                                                 np->dirty_tx++;
                                                 entry++;