Provided by: linux-doc-2.6.15_2.6.15-23.39_all bug


       skb_unshare - make a copy of a shared buffer


       struct sk_buff * skb_unshare  (struct sk_buff * skb, gfp_t pri);


       skb    buffer to check

       pri    priority for memory allocation


       If  the  socket buffer is a clone then this function creates a new copy
       of the data, drops a reference count on the old copy  and  returns  the
       new  copy  with  the reference count at 1. If the buffer is not a clone
       the original buffer is returned. When called with a  spinlock  held  or
       from interrupt state pri must be GFP_ATOMIC

        NULL is returned on a memory allocation failure.