linux-kernel - Re: [PATCH bpf-next] bpf: tcp: Fix unused function warnings

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Date:   Thu, 19 Mar 2020 10:38:29 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Jakub Sitnicki <jakub@...udflare.com>
Cc:     YueHaibing <yuehaibing@...wei.com>,
        Lorenz Bauer <lmb@...udflare.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        john fastabend <john.fastabend@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf-next] bpf: tcp: Fix unused function warnings

On Thu, Mar 19, 2020 at 10:00 AM Jakub Sitnicki <jakub@...udflare.com> wrote:
>
> On Thu, Mar 19, 2020 at 01:46 PM CET, YueHaibing wrote:
> > If BPF_STREAM_PARSER is not set, gcc warns:
> >
> > net/ipv4/tcp_bpf.c:483:12: warning: 'tcp_bpf_sendpage' defined but not used [-Wunused-function]
> > net/ipv4/tcp_bpf.c:395:12: warning: 'tcp_bpf_sendmsg' defined but not used [-Wunused-function]
> > net/ipv4/tcp_bpf.c:13:13: warning: 'tcp_bpf_stream_read' defined but not used [-Wunused-function]
> >
> > Moves the unused functions into the #ifdef
> >
> > Reported-by: Hulk Robot <hulkci@...wei.com>
> > Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> > ---
>
> In addition to this fix, looks like tcp_bpf_recvmsg can be static and
> also conditional on CONFIG_BPF_STREAM_PARSER.
>
> Reviewed-by: Jakub Sitnicki <jakub@...udflare.com>

Fixes tag is missing as well?