net: Use skb accessors in network drivers

In preparation for unifying the skb_frag and bio_vec, use the fine
accessors which already exist and use skb_frag_t instead of
struct skb_frag_struct.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/intel/iavf/iavf_txrx.c

@@ -2161,7 +2161,7 @@ static void iavf_create_tx_ctx(struct iavf_ring *tx_ring,
  **/
 bool __iavf_chk_linearize(struct sk_buff *skb)
 {
-	const struct skb_frag_struct *frag, *stale;
+	const skb_frag_t *frag, *stale;
 	int nr_frags, sum;
 
 	/* no need to check if number of frags is less than 7 */
@@ -2269,7 +2269,7 @@ static inline void iavf_tx_map(struct iavf_ring *tx_ring, struct sk_buff *skb,
 {
 	unsigned int data_len = skb->data_len;
 	unsigned int size = skb_headlen(skb);
-	struct skb_frag_struct *frag;
+	skb_frag_t *frag;
 	struct iavf_tx_buffer *tx_bi;
 	struct iavf_tx_desc *tx_desc;
 	u16 i = tx_ring->next_to_use;

drivers/net/ethernet/intel/iavf/iavf_txrx.h

@@ -462,7 +462,7 @@ bool __iavf_chk_linearize(struct sk_buff *skb);
  **/
 static inline int iavf_xmit_descriptor_count(struct sk_buff *skb)
 {
-	const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
+	const skb_frag_t *frag = &skb_shinfo(skb)->frags[0];
 	unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
 	int count = 0, size = skb_headlen(skb);