skb_expand_head
skb = skb_expand_head(skb, hh_len);
struct sk_buff *skb_expand_head(struct sk_buff *skb, unsigned int headroom);
skb = skb_expand_head(skb, hh_len);
skb = skb_expand_head(skb, hh_len);
EXPORT_SYMBOL(skb_expand_head);
skb = skb_expand_head(skb, hh_len);
skb = skb_expand_head(skb, head_room);
skb = skb_expand_head(skb, hh_len);
skb = skb_expand_head(skb, hh_len);
skb = skb_expand_head(skb, hh_len);