Re: [PATCH mptcp-next v2 5/5] selftests: mptcp: add mptcp getsockopt test cases

[kernel test robot <lkp@intel.com>]

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Hi Florian,

I love your patch! Perhaps something to improve:

[auto build test WARNING on kselftest/next]
[also build test WARNING on mptcp/export linus/master v5.14-rc6 next-20210816]
[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/Florian-Westphal/mptcp-add-SOL_MPTCP-getsockopt-support/20210817-003412
base:   https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next
config: i386-randconfig-a012-20210816 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 44d0a99a12ec7ead4d2f5ef649ba05b40f6d463d)
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/7eb1b6e289708ffa4da5aa98540a83a8b22bc452
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Florian-Westphal/mptcp-add-SOL_MPTCP-getsockopt-support/20210817-003412
        git checkout 7eb1b6e289708ffa4da5aa98540a83a8b22bc452
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386 

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 >>):

>> mptcp_sockopt.c:536:2: warning: variable 'fd' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized]
           default:
           ^~~~~~~
   mptcp_sockopt.c:545:14: note: uninitialized use occurs here
           r = xaccept(fd);
                       ^~
   mptcp_sockopt.c:527:8: note: initialize the variable 'fd' to silence this warning
           int fd, r;
                 ^
                  = 0
   mptcp_sockopt.c:565:2: warning: variable 'fd' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized]
           default:
           ^~~~~~~
   mptcp_sockopt.c:569:21: note: uninitialized use occurs here
           connect_one_server(fd);
                              ^~
   mptcp_sockopt.c:554:8: note: initialize the variable 'fd' to silence this warning
           int fd;
                 ^
                  = 0
   2 warnings generated.

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

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