Re: [PATCH net-next] mptcp: sockopt: implement IPV6_TCLASS

Hi David,

kernel test robot noticed the following build errors:

[auto build test ERROR on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/David-equinox-Lamparter/mptcp-sockopt-implement-IPV6_TCLASS/20260713-162825
base:   net-next/main
patch link:    https://lore.kernel.org/r/20260713080634.296011-1-equinox%40diac24.net
patch subject: [PATCH net-next] mptcp: sockopt: implement IPV6_TCLASS
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260713/202607131605.i02odG4b-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260713/202607131605.i02odG4b-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot [off-list ref]
| Closes: https://lore.kernel.org/oe-kbuild-all/202607131605.i02odG4b-lkp@intel.com/ (local)

All errors (new ones prefixed by >>):

quoted

ld.lld: error: undefined symbol: ipv6_setsockopt

   >>> referenced by sockopt.c:404 (net/mptcp/sockopt.c:404)
   >>>               vmlinux.o:(mptcp_setsockopt)

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki