net:use help function of skb_checksum_start_offset to calculate offset

Although these are equivalent, but the skb_checksum_start_offset() is more readable.

Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/tile/tilepro.c b/drivers/net/tile/tilepro.c
index 0825db6..1e980fd 100644 (file)
--- a/drivers/net/tile/tilepro.c
+++ b/drivers/net/tile/tilepro.c
@@ -1930,7 +1930,7 @@ static int tile_net_tx(struct sk_buff *skb, struct net_device *dev)
        unsigned int len = skb->len;
        unsigned char *data = skb->data;
 
-       unsigned int csum_start = skb->csum_start - skb_headroom(skb);
+       unsigned int csum_start = skb_checksum_start_offset(skb);
 
        lepp_frag_t frags[LEPP_MAX_FRAGS];
 

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 98ecfd7..fc0c42a 100644 (file)
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1328,7 +1328,7 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, u32 features)
        /* Do software UFO. Complete and fill in the UDP checksum as HW cannot
         * do checksum of UDP packets sent as multiple IP fragments.
         */
-       offset = skb->csum_start - skb_headroom(skb);
+       offset = skb_checksum_start_offset(skb);
        csum = skb_checksum(skb, offset, skb->len- offset, 0);
        offset += skb->csum_offset;
        *(__sum16 *)(skb->data + offset) = csum_fold(csum);