Hi Wythe, kernel test robot noticed the following build warnings: [auto build test WARNING on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/D-Wythe/bpf-export-necessary-sympols-for-modules-with-struct_ops/20250731-164431 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20250731084240.86550-4-alibuda%40linux.alibaba.com patch subject: [PATCH bpf-next 3/5] net/smc: bpf: Introduce generic hook for handshake flow config: arm-randconfig-003-20250801 (https://download.01.org/0day-ci/archive/20250801/202508010316.wuSPjSOr-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 10.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250801/202508010316.wuSPjSOr-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202508010316.wuSPjSOr-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): net/ipv4/tcp_output.c: In function 'smc_set_option': >> net/ipv4/tcp_output.c:773:15: warning: unused variable 'sk' [-Wunused-variable] 773 | struct sock *sk = &tp->inet_conn.icsk_inet.sk; | ^~ net/ipv4/tcp_output.c: In function 'smc_set_option_cond': net/ipv4/tcp_output.c:794:21: warning: unused variable 'sk' [-Wunused-variable] 794 | const struct sock *sk = &tp->inet_conn.icsk_inet.sk; | ^~ vim +/sk +773 net/ipv4/tcp_output.c 767 768 static void smc_set_option(struct tcp_sock *tp, 769 struct tcp_out_options *opts, 770 unsigned int *remaining) 771 { 772 #if IS_ENABLED(CONFIG_SMC) > 773 struct sock *sk = &tp->inet_conn.icsk_inet.sk; 774 if (static_branch_unlikely(&tcp_have_smc)) { 775 if (tp->syn_smc) { 776 tp->syn_smc = !!smc_call_hsbpf(1, sk, syn_option, tp); 777 /* re-check syn_smc */ 778 if (tp->syn_smc && 779 *remaining >= TCPOLEN_EXP_SMC_BASE_ALIGNED) { 780 opts->options |= OPTION_SMC; 781 *remaining -= TCPOLEN_EXP_SMC_BASE_ALIGNED; 782 } 783 } 784 } 785 #endif 786 } 787 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
