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Date:   Sun, 16 Aug 2020 17:00:06 +0800
From:   kernel test robot <lkp@...el.com>
To:     Pascal Bouchareine <kalou@....net>, linux-kernel@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        Pascal Bouchareine <kalou@....net>, linux-api@...r.kernel.org,
        netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH 2/2] net: socket: implement SO_DESCRIPTION

Hi Pascal,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on tip/perf/core]
[also build test WARNING on linux/master v5.8]
[cannot apply to security/next-testing linus/master next-20200814]
[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/Pascal-Bouchareine/proc-socket-attach-description-to-sockets/20200816-090222
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git d903b6d029d66e6478562d75ea18d89098f7b7e8
config: x86_64-randconfig-r006-20200816 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ab9fc8bae805c785066779e76e7846aabad5609e)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> net/core/sock.c:831:5: warning: no previous prototype for function 'sock_set_description' [-Wmissing-prototypes]
   int sock_set_description(struct sock *sk, char __user *user_desc)
       ^
   net/core/sock.c:831:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int sock_set_description(struct sock *sk, char __user *user_desc)
   ^
   static 
   1 warning generated.

vim +/sock_set_description +831 net/core/sock.c

   830	
 > 831	int sock_set_description(struct sock *sk, char __user *user_desc)
   832	{
   833		char *old, *desc;
   834	
   835		desc = strndup_user(user_desc, SK_MAX_DESC_SIZE, GFP_KERNEL_ACCOUNT);
   836		if (IS_ERR(desc))
   837			return PTR_ERR(desc);
   838	
   839		lock_sock(sk);
   840		old = sk->sk_description;
   841		sk->sk_description = desc;
   842		release_sock(sk);
   843	
   844		kfree(old);
   845	
   846		return 0;
   847	}
   848	

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

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