netdev - Re: [PATCH] netfilter: bpf_link: avoid unused-function warning

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Date: Tue, 1 Aug 2023 09:20:12 -0600
From: Daniel Xu <dxu@...uu.xyz>
To: Arnd Bergmann <arnd@...nel.org>
Cc: Pablo Neira Ayuso <pablo@...filter.org>, 
	Jozsef Kadlecsik <kadlec@...filter.org>, Florian Westphal <fw@...len.de>, Arnd Bergmann <arnd@...db.de>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Alexei Starovoitov <ast@...nel.org>, netfilter-devel@...r.kernel.org, coreteam@...filter.org, 
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH] netfilter: bpf_link: avoid unused-function warning

Hi Arnd,

On Tue, Aug 01, 2023 at 05:02:41PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The newly added function is unused in some random configurations:
> 
> net/netfilter/nf_bpf_link.c:32:1: error: 'get_proto_defrag_hook' defined but not used [-Werror=unused-function]
>    32 | get_proto_defrag_hook(struct bpf_nf_link *link,
>       | ^~~~~~~~~~~~~~~~~~~~~
> 

This was fixed in 81584c23f249 ("netfilter: bpf: Only define get_proto_defrag_hook() if necessary").

Thanks,
Daniel