netdev - [PATCH] samples/bpf: xdpsock: Use swap() instead of open coding it

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Date:   Fri, 14 Jan 2022 00:22:28 +0800
From:   Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
To:     ast@...nel.org
Cc:     daniel@...earbox.net, davem@...emloft.net, kuba@...nel.org,
        hawk@...nel.org, john.fastabend@...il.com, bjorn@...nel.org,
        magnus.karlsson@...el.com, jonathan.lemon@...il.com,
        andrii@...nel.org, kafai@...com, songliubraving@...com, yhs@...com,
        kpsingh@...nel.org, netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: [PATCH] samples/bpf: xdpsock: Use swap() instead of open coding it

Clean the following coccicheck warning:

./samples/bpf/xdpsock_user.c:632:22-23: WARNING opportunity for swap().

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
---
 samples/bpf/xdpsock_user.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
index aa50864e4415..30065c703c77 100644
--- a/samples/bpf/xdpsock_user.c
+++ b/samples/bpf/xdpsock_user.c
@@ -626,11 +626,8 @@ static void swap_mac_addresses(void *data)
 	struct ether_header *eth = (struct ether_header *)data;
 	struct ether_addr *src_addr = (struct ether_addr *)&eth->ether_shost;
 	struct ether_addr *dst_addr = (struct ether_addr *)&eth->ether_dhost;
-	struct ether_addr tmp;
 
-	tmp = *src_addr;
-	*src_addr = *dst_addr;
-	*dst_addr = tmp;
+	swap(*src_addr, *dst_addr);
 }
 
 static void hex_dump(void *pkt, size_t length, u64 addr)
-- 
2.20.1.7.g153144c