taglinefilesource code
skb_device_locked118include/linux/skbuff.hextern int      skb_device_locked(struct sk_buff *skb);
skb_device_locked366net/inet/dev.cif(pri>=0 && !skb_device_locked(skb))
skb_device_locked1952net/inet/ip.cif (sk && !skb_device_locked(skb))