[PATCH] net: Pass NULL to skb_network_protocol() when we don't care about vlan depth

[linmiaohe]

From: Miaohe Lin <linmiaohe@xxxxxxxxxx>

When we don't care about vlan depth, we could pass NULL instead of the
address of a unused local variable to skb_network_protocol() as a param.

Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
---
 net/core/skbuff.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 3219c26ddfae..8a0c39e4ab0a 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -3758,7 +3758,6 @@ struct sk_buff *skb_segment(struct sk_buff *head_skb,
 	int err = -ENOMEM;
 	int i = 0;
 	int pos;
-	int dummy;
 
 	if (list_skb && !list_skb->head_frag && skb_headlen(list_skb) &&
 	    (skb_shinfo(head_skb)->gso_type & SKB_GSO_DODGY)) {
@@ -3780,7 +3779,7 @@ struct sk_buff *skb_segment(struct sk_buff *head_skb,
 	}
 
 	__skb_push(head_skb, doffset);
-	proto = skb_network_protocol(head_skb, &dummy);
+	proto = skb_network_protocol(head_skb, NULL);
 	if (unlikely(!proto))
 		return ERR_PTR(-EINVAL);
 
-- 
2.19.1