taglinefilesource code
skb_device_locked133include/linux/skbuff.hextern int      skb_device_locked(struct sk_buff *skb);
skb_device_locked321net/core/dev.cif(pri>=0 && !skb_device_locked(skb))
skb_device_locked549net/ipv4/tcp.cif (sk && !skb_device_locked(skb))