[VLAN]: Constify skb argument to vlan_get_tag()
Required by next patch to use it from the flow classifier.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 34f40ef..79504b2 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -327,7 +327,7 @@
*
* Returns error if the skb is not of VLAN type
*/
-static inline int __vlan_get_tag(struct sk_buff *skb, unsigned short *tag)
+static inline int __vlan_get_tag(const struct sk_buff *skb, unsigned short *tag)
{
struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb->data;
@@ -347,7 +347,8 @@
*
* Returns error if @skb->cb[] is not set correctly
*/
-static inline int __vlan_hwaccel_get_tag(struct sk_buff *skb, unsigned short *tag)
+static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
+ unsigned short *tag)
{
struct vlan_skb_tx_cookie *cookie;
@@ -370,7 +371,7 @@
*
* Returns error if the skb is not VLAN tagged
*/
-static inline int vlan_get_tag(struct sk_buff *skb, unsigned short *tag)
+static inline int vlan_get_tag(const struct sk_buff *skb, unsigned short *tag)
{
if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
return __vlan_hwaccel_get_tag(skb, tag);