netdev - Re: [PATCH] samples:bpf:remove unneeded variable

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Date:   Wed, 8 Dec 2021 23:13:13 -0800
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     cgel.zte@...il.com
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        john fastabend <john.fastabend@...il.com>,
        Andrii Nakryiko <andrii@...nel.org>, Martin Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        KP Singh <kpsingh@...nel.org>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        chiminghao <chi.minghao@....com.cn>,
        Zeal Robot <zealci@....com.cm>
Subject: Re: [PATCH] samples:bpf:remove unneeded variable

On Wed, Dec 8, 2021 at 5:55 PM <cgel.zte@...il.com> wrote:
>
> From: chiminghao <chi.minghao@....com.cn>
>
> return value form directly instead of
> taking this in another redundant variable.
>
> Reported-by: Zeal Robot <zealci@....com.cm>
> Signed-off-by: chiminghao <chi.minghao@....com.cn>

Signed-off-by should contain properly capitalized full name, please update.

Also please use "samples/bpf: " patch prefix and use [PATCH bpf-next]
to designate the destination kernel tree. Thanks.

> ---
>  samples/bpf/xdp_redirect_cpu.bpf.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/samples/bpf/xdp_redirect_cpu.bpf.c b/samples/bpf/xdp_redirect_cpu.bpf.c
> index f10fe3cf25f6..25e3a405375f 100644
> --- a/samples/bpf/xdp_redirect_cpu.bpf.c
> +++ b/samples/bpf/xdp_redirect_cpu.bpf.c
> @@ -100,7 +100,6 @@ u16 get_dest_port_ipv4_udp(struct xdp_md *ctx, u64 nh_off)
>         void *data     = (void *)(long)ctx->data;
>         struct iphdr *iph = data + nh_off;
>         struct udphdr *udph;
> -       u16 dport;
>
>         if (iph + 1 > data_end)
>                 return 0;
> @@ -111,8 +110,7 @@ u16 get_dest_port_ipv4_udp(struct xdp_md *ctx, u64 nh_off)
>         if (udph + 1 > data_end)
>                 return 0;
>
> -       dport = bpf_ntohs(udph->dest);
> -       return dport;
> +       return bpf_ntohs(udph->dest);
>  }
>
>  static __always_inline
> --
> 2.25.1
>