Hi Leonard, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on next-20210420] [also build test WARNING on v5.12-rc8] [cannot apply to linus/master v5.12-rc8 v5.12-rc7 v5.12-rc6] [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/Leonard-Crestez/tcp-Delay-sendin... base: 593ef1658ecf61d3619885bdbbcfffa3d1417891 config: nios2-defconfig (attached as .config) compiler: nios2-linux-gcc (GCC) 9.3.0 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/0b2ec1d5d492384a89a499c7227c7f6a2... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Leonard-Crestez/tcp-Delay-sending-non-probes-for-RFC4821-mtu-probing/20210421-182309 git checkout 0b2ec1d5d492384a89a499c7227c7f6a21f283d0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=nios2 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 1759 | void tcp_mtu_probe_wait_stop(struct sock *sk) | ^~~~~~~~~~~~~~~~~~~~~~~ vim +/tcp_mtu_probe_wait_stop +1759 net/ipv4/tcp_output.c 1758 1760 { 1761 struct inet_connection_sock *icsk = inet_csk(sk); 1762 1763 if (icsk->icsk_mtup.wait_data) { 1764 icsk->icsk_mtup.wait_data = false; 1765 sk_stop_timer(sk, &icsk->icsk_mtup.wait_data_timer); 1766 } 1767 } 1768 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org