linux-kernel - Re: [PATCH 10/10] bpf: Remove the now superfluous sentinel elements from ctl

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Message-ID: <CAEf4BzZY0TATP4ug54j43o=qDvHBe8xW=hKwRRTfBuLUKGjrmg@mail.gmail.com>
Date:   Tue, 7 Nov 2023 10:15:39 -0800
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     j.granados@...sung.com
Cc:     Luis Chamberlain <mcgrof@...nel.org>, willy@...radead.org,
        josh@...htriplett.org, Kees Cook <keescook@...omium.org>,
        Eric Biederman <ebiederm@...ssion.com>,
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        Sergey Senozhatsky <senozhatsky@...omium.org>,
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        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        John Fastabend <john.fastabend@...il.com>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>,
        Yonghong Song <yonghong.song@...ux.dev>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        linux-kernel@...r.kernel.org, kexec@...ts.infradead.org,
        linux-fsdevel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
        bpf@...r.kernel.org
Subject: Re: [PATCH 10/10] bpf: Remove the now superfluous sentinel elements
 from ctl_table array

On Tue, Nov 7, 2023 at 5:45 AM Joel Granados via B4 Relay
<devnull+j.granados.samsung.com@...nel.org> wrote:
>
> From: Joel Granados <j.granados@...sung.com>
>
> This commit comes at the tail end of a greater effort to remove the
> empty elements at the end of the ctl_table arrays (sentinels) which
> will reduce the overall build time size of the kernel and run time
> memory bloat by ~64 bytes per sentinel (further information Link :
> https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)
>
> Remove sentinel element from bpf_syscall_table.
>
> Signed-off-by: Joel Granados <j.granados@...sung.com>
> ---
>  kernel/bpf/syscall.c | 1 -
>  1 file changed, 1 deletion(-)
>

LGTM.

Acked-by: Andrii Nakryiko <andrii@...nel.org>

> diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
> index eb01c31ed591..1cb5b852b4e7 100644
> --- a/kernel/bpf/syscall.c
> +++ b/kernel/bpf/syscall.c
> @@ -5679,7 +5679,6 @@ static struct ctl_table bpf_syscall_table[] = {
>                 .mode           = 0644,
>                 .proc_handler   = bpf_stats_handler,
>         },
> -       { }
>  };
>
>  static int __init bpf_syscall_sysctl_init(void)
>
> --
> 2.30.2
>