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Message-ID: <CAEf4BzZcMo0ud-9_58939G8NxYYFmro7kO2rguCAM4hgDXEpOA@mail.gmail.com>
Date: Wed, 8 Dec 2021 23:10:12 -0800
From: Andrii Nakryiko <andrii.nakryiko@...il.com>
To: Yihao Han <hanyihao@...o.com>
Cc: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Andrii Nakryiko <andrii@...nel.org>,
Martin KaFai Lau <kafai@...com>,
Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
John Fastabend <john.fastabend@...il.com>,
KP Singh <kpsingh@...nel.org>,
Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
open list <linux-kernel@...r.kernel.org>, kernel@...o.com
Subject: Re: [PATCH] samples/bpf: fix swap.cocci warning
On Wed, Dec 8, 2021 at 3:34 AM Yihao Han <hanyihao@...o.com> wrote:
>
> Fix following swap.cocci warning:
> ./samples/bpf/xsk_fwd.c:660:22-23:
> WARNING opportunity for swap()
>
> Signed-off-by: Yihao Han <hanyihao@...o.com>
> ---
> samples/bpf/xsk_fwd.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/samples/bpf/xsk_fwd.c b/samples/bpf/xsk_fwd.c
> index 1cd97c84c337..e82582b225d3 100644
> --- a/samples/bpf/xsk_fwd.c
> +++ b/samples/bpf/xsk_fwd.c
> @@ -653,9 +653,7 @@ static void swap_mac_addresses(void *data)
> struct ether_addr *dst_addr = (struct ether_addr *)ð->ether_dhost;
> struct ether_addr tmp;
this variable needs to be removed as well then
>
> - tmp = *src_addr;
> - *src_addr = *dst_addr;
> - *dst_addr = tmp;
> + swap(*src_addr, *dst_addr);
> }
>
> static void *
> --
> 2.17.1
>
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