[dhowells-fs:rxrpc-ringless 17/21] ld.lld: error: undefined symbol: udpv6_sendmsg

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git rxrpc-ringless
head:   c388a8388ad238ffbe0cd204c3eacaf200055751
commit: d24f75894c69b625aaa8f2b937072e750a5787df [17/21] rxrpc: Call udp_sendmsg() directly
config: x86_64-randconfig-a005 (https://download.01.org/0day-ci/archive/20220422/202204220240.iPx7FQgd-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 5bd87350a5ae429baf8f373cb226a57b62f87280)
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://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit/?id=d24f75894c69b625aaa8f2b937072e750a5787df
        git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git
        git fetch --no-tags dhowells-fs rxrpc-ringless
        git checkout d24f75894c69b625aaa8f2b937072e750a5787df
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 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 >>):

>> ld.lld: error: undefined symbol: udpv6_sendmsg
   >>> referenced by output.c
   >>>               rxrpc/output.o:(rxrpc_send_abort_packet) in archive net/built-in.a
   >>> referenced by output.c
   >>>               rxrpc/output.o:(rxrpc_reject_packets) in archive net/built-in.a
   >>> referenced by output.c
   >>>               rxrpc/output.o:(rxrpc_send_keepalive) in archive net/built-in.a
   >>> referenced 3 more times

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