Hi David, On 2/19/22 2:54 PM, David Ahern wrote: > On 2/19/22 12:12 PM, Dongli Zhang wrote: >> diff --git a/drivers/net/tun.c b/drivers/net/tun.c >> index aa27268edc5f..ab47a66deb7f 100644 >> --- a/drivers/net/tun.c >> +++ b/drivers/net/tun.c >> @@ -1062,13 +1062,16 @@ static netdev_tx_t tun_net_xmit(struct sk_buff *skb, struct net_device *dev) >> struct netdev_queue *queue; >> struct tun_file *tfile; >> int len = skb->len; >> + int drop_reason; > > enum skb_drop_reason > As mentioned in previous email ... According to cscope, so far all 'drop_reason' are declared in type 'int' (e.g., ip_rcv_finish_core()). I will change above to enum. Thank you very much! Dongli Zhang