netdev - Re: [PATCH v17 bpf-next 12/23] bpf: add multi-buff support to the bpf_xdp_adjust

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Message-ID: <20211104191641.3bc9d873@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Thu, 4 Nov 2021 19:16:41 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Lorenzo Bianconi <lorenzo@...nel.org>
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org,
        lorenzo.bianconi@...hat.com, davem@...emloft.net, ast@...nel.org,
        daniel@...earbox.net, shayagr@...zon.com, john.fastabend@...il.com,
        dsahern@...nel.org, brouer@...hat.com, echaudro@...hat.com,
        jasowang@...hat.com, alexander.duyck@...il.com, saeed@...nel.org,
        maciej.fijalkowski@...el.com, magnus.karlsson@...el.com,
        tirthendu.sarkar@...el.com, toke@...hat.com
Subject: Re: [PATCH v17 bpf-next 12/23] bpf: add multi-buff support to the
 bpf_xdp_adjust_tail() API

On Thu,  4 Nov 2021 18:35:32 +0100 Lorenzo Bianconi wrote:
> +static int bpf_xdp_mb_shrink_tail(struct xdp_buff *xdp, int offset)
> +{
> +	struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp);
> +	int i, n_frags_free = 0, len_free = 0, tlen_free = 0;

clang says tlen_free set but not used.