Name
skb_cow_head — 
     skb_cow but only making the head writable
 
Synopsis
| int fsfuncskb_cow_head ( | struct sk_buff * skb, | 
|  | unsigned int headroom ); | 
 
Arguments
- skb
- 
     buffer to cow
     
- headroom
- 
     needed headroom
     
Description
   This function is identical to skb_cow except that we replace the
   skb_cloned check by skb_header_cloned.  It should be used when
   you only need to push on some header and do not need to modify
   the data.