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Date:   Sat, 12 Feb 2022 03:42:03 +0800
From:   kernel test robot <lkp@intel.com>
To:     Ricardo Ribalda <ribalda@chromium.org>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Eric Dumazet <edumazet@google.com>,
        Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
        David Ahern <dsahern@kernel.org>, linux-kernel@vger.kernel.org
Cc:     kbuild-all@lists.01.org, netdev@vger.kernel.org,
        Ricardo Ribalda <ribalda@chromium.org>
Subject: Re: [PATCH] net: Fix build when CONFIG_INET is not enabled
Message-ID: <202202120329.TB5XJjoH-lkp@intel.com>
References: <20220211164026.409225-1-ribalda@chromium.org>
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In-Reply-To: <20220211164026.409225-1-ribalda@chromium.org>
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Hi Ricardo,

I love your patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]
[also build test WARNING on net/master horms-ipvs/master linus/master v5.17-rc3 next-20220211]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Ricardo-Ribalda/net-Fix-build-when-CONFIG_INET-is-not-enabled/20220212-004127
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 5b91c5cc0e7be4e41567cb2a6e21a8bb682c7cc5
config: arc-randconfig-r043-20220211 (https://download.01.org/0day-ci/archive/20220212/202202120329.TB5XJjoH-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/f9b7fbd36ce386e1b9fb64f316878a4e011c1a09
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Ricardo-Ribalda/net-Fix-build-when-CONFIG_INET-is-not-enabled/20220212-004127
        git checkout f9b7fbd36ce386e1b9fb64f316878a4e011c1a09
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash net/core/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> net/core/sock.c:2061:6: warning: no previous prototype for '__sk_defer_free_flush' [-Wmissing-prototypes]
    2061 | void __sk_defer_free_flush(struct sock *sk)
         |      ^~~~~~~~~~~~~~~~~~~~~


vim +/__sk_defer_free_flush +2061 net/core/sock.c

  2060	
> 2061	void __sk_defer_free_flush(struct sock *sk)
  2062	{
  2063		struct llist_node *head;
  2064		struct sk_buff *skb, *n;
  2065	
  2066		head = llist_del_all(&sk->defer_list);
  2067		llist_for_each_entry_safe(skb, n, head, ll_node) {
  2068			prefetch(n);
  2069			skb_mark_not_on_list(skb);
  2070			__kfree_skb(skb);
  2071		}
  2072	}
  2073	EXPORT_SYMBOL(__sk_defer_free_flush);
  2074	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org