netdev - Re: [PATCH net-next 3/3] tcp: make tcp_v{4,6}_send

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Message-ID: <202602040323.jUZrgY0y-lkp@intel.com>
Date: Wed, 4 Feb 2026 03:55:58 +0800
From: kernel test robot <lkp@...el.com>
To: Eric Dumazet <edumazet@...gle.com>,
	"David S . Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: oe-kbuild-all@...ts.linux.dev, Simon Horman <horms@...nel.org>,
	Neal Cardwell <ncardwell@...gle.com>,
	Kuniyuki Iwashima <kuniyu@...gle.com>, netdev@...r.kernel.org,
	eric.dumazet@...il.com, Eric Dumazet <edumazet@...gle.com>
Subject: Re: [PATCH net-next 3/3] tcp: make tcp_v{4,6}_send_check() static

Hi Eric,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Eric-Dumazet/tcp-inline-__tcp_v4_send_check/20260203-224938
base:   net-next/main
patch link:    https://lore.kernel.org/r/20260203144053.83193-4-edumazet%40google.com
patch subject: [PATCH net-next 3/3] tcp: make tcp_v{4,6}_send_check() static
config: parisc-defconfig (https://download.01.org/0day-ci/archive/20260204/202602040323.jUZrgY0y-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260204/202602040323.jUZrgY0y-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602040323.jUZrgY0y-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> net/ipv4/tcp_output.c:1482:13: warning: 'tcp_v4_send_check' defined but not used [-Wunused-function]
    1482 | static void tcp_v4_send_check(struct sock *sk, struct sk_buff *skb)
         |             ^~~~~~~~~~~~~~~~~


vim +/tcp_v4_send_check +1482 net/ipv4/tcp_output.c

  1480	
  1481	/* This routine computes an IPv4 TCP checksum. */
> 1482	static void tcp_v4_send_check(struct sock *sk, struct sk_buff *skb)
  1483	{
  1484		const struct inet_sock *inet = inet_sk(sk);
  1485	
  1486		__tcp_v4_send_check(skb, inet->inet_saddr, inet->inet_daddr);
  1487	}
  1488	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki