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[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>
This commit is contained in:
Patrick McHardy 2008-02-05 16:20:22 -08:00 committed by David S. Miller
parent 4f25049106
commit 181499356e
1 changed files with 4 additions and 3 deletions
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7
include/linux/if_vlan.h
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@ -327,7 +327,7 @@ static inline struct sk_buff *vlan_put_tag(struct sk_buff *skb, unsigned short t
*
* 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 @@ static inline int __vlan_get_tag(struct sk_buff *skb, unsigned short *tag)
*
* 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 @@ static inline int __vlan_hwaccel_get_tag(struct sk_buff *skb, unsigned short *ta
*
* 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);