linux-kernel - [PATCH 1/1] blackhole_dev: remove unused variable 'ethh' in test_blackholedev

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Message-ID: <20210519122741.7832-1-thunder.leizhen@huawei.com>
Date:   Wed, 19 May 2021 20:27:41 +0800
From:   Zhen Lei <thunder.leizhen@...wei.com>
To:     Mahesh Bandewar <maheshb@...gle.com>,
        "David S . Miller" <davem@...emloft.net>,
        linux-kernel <linux-kernel@...r.kernel.org>
CC:     Zhen Lei <thunder.leizhen@...wei.com>
Subject: [PATCH 1/1] blackhole_dev: remove unused variable 'ethh' in test_blackholedev_init()

GCC reports the following warning with W=1:

lib/test_blackhole_dev.c:32:17: warning:
 variable 'ethh' set but not used [-Wunused-but-set-variable]
   32 |  struct ethhdr *ethh;
      |                 ^~~~

This variable is not used, remove it to fix the warning.

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
---
 lib/test_blackhole_dev.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/test_blackhole_dev.c b/lib/test_blackhole_dev.c
index 4c40580a99a3..393a0083d027 100644
--- a/lib/test_blackhole_dev.c
+++ b/lib/test_blackhole_dev.c
@@ -29,7 +29,6 @@ static int __init test_blackholedev_init(void)
 {
 	struct ipv6hdr *ip6h;
 	struct sk_buff *skb;
-	struct ethhdr *ethh;
 	struct udphdr *uh;
 	int data_len;
 	int ret;
@@ -61,7 +60,7 @@ static int __init test_blackholedev_init(void)
 	ip6h->saddr = in6addr_loopback;
 	ip6h->daddr = in6addr_loopback;
 	/* Ether */
-	ethh = (struct ethhdr *)skb_push(skb, sizeof(struct ethhdr));
+	(void)skb_push(skb, sizeof(struct ethhdr));
 	skb_set_mac_header(skb, 0);
 
 	skb->protocol = htons(ETH_P_IPV6);
-- 
2.25.1