# Re: \[PATCH net v3 1/3\] net: hsr: privatize interlink-bound skbs before address mutation

- From: Jakub Kicinski \<kuba@kernel.org\>
- Date: 2026-08-14 01:27:45 
- List: netdev
- Page: https://ratatoskr.run/netdev/2026/08/17410426
- Thread: https://ratatoskr.run/netdev/2026/08/17385631/t.md

```text
On Sat,  8 Aug 2026 02:45:22 +0200 Xin Xie wrote:
> +	if (port->type == HSR_PT_INTERLINK &&
> +	    (frame->port_rcv->type == HSR_PT_MASTER ||
> +	     (frame->is_local_dest && !frame->is_local_exclusive)) &&
> +	    skb_cow(skb, 0)) {

Would skb_cow_head() be sufficient? It's much cheaper, at least for TCP.
```