Hi Christoph,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on mkl-can-next/testing]
[also build test WARNING on linus/master v6.1-rc6 next-20221125]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Christoph-Fritz/LIN-support-for-Linux/20221128-032008
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next.git testing
patch link:    https://lore.kernel.org/r/20221127190244.888414-3-christoph.fritz%40hexdev.de
patch subject: [PATCH 2/2] [RFC] can: Add LIN proto skeleton
config: ia64-allmodconfig
compiler: ia64-linux-gcc (GCC) 12.1.0
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/intel-lab-lkp/linux/commit/df8f1d68ecf9715b1b9219e70316c4d44043f363
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Christoph-Fritz/LIN-support-for-Linux/20221128-032008
        git checkout df8f1d68ecf9715b1b9219e70316c4d44043f363
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 SHELL=/bin/bash net/can/

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

All warnings (new ones prefixed by >>):

   net/can/lin.c: In function 'lin_release':
>> net/can/lin.c:42:21: warning: variable 'net' set but not used [-Wunused-but-set-variable]
      42 |         struct net *net;
         |                     ^~~
>> net/can/lin.c:41:26: warning: variable 'so' set but not used [-Wunused-but-set-variable]
      41 |         struct lin_sock *so;
         |                          ^~


vim +/net +42 net/can/lin.c

    37	
    38	static int lin_release(struct socket *sock)
    39	{
    40		struct sock *sk = sock->sk;
  > 41		struct lin_sock *so;
  > 42		struct net *net;
    43	
    44		if (!sk)
    45			return 0;
    46	
    47		so = lin_sk(sk);
    48		net = sock_net(sk);
    49	
    50		// Nothing do to so far
    51	
    52		sock_orphan(sk);
    53		sock->sk = NULL;
    54	
    55		release_sock(sk);
    56		sock_put(sk);
    57	
    58		return 0;
    59	}
    60	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp