sock_efree
skb->destructor = sock_efree;
void sock_efree(struct sk_buff *skb);
#define sock_edemux sock_efree
skb->destructor = sock_efree;
clone->destructor = sock_efree;
EXPORT_SYMBOL(sock_efree);
skb->destructor = sock_efree;
skb->destructor = sock_efree;
skb->destructor = sock_efree;
if (nskb->destructor == sock_efree)