Re: [PATCH 3/4] mptcp: handle join requests via pernet listen socket

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

Hi Florian,

I love your patch! Yet something to improve:

[auto build test ERROR on mptcp/export]
[cannot apply to linus/master v5.17-rc5 next-20220223]
[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-replace-per-addr-listener-sockets/20220223-190948
base:   https://github.com/multipath-tcp/mptcp_net-next.git export
config: riscv-allmodconfig (https://download.01.org/0day-ci/archive/20220224/202202241550.kL2XhEdK-lkp@intel.com/config)
compiler: riscv64-linux-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/f12f5ac9c72117b9182b05e236674f68041deb5a
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Florian-Westphal/mptcp-replace-per-addr-listener-sockets/20220223-190948
        git checkout f12f5ac9c72117b9182b05e236674f68041deb5a
        # 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=riscv SHELL=/bin/bash

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

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "__mptcp_handle_join" [net/ipv6/ipv6.ko] undefined!

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