Hi Tony, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on net-next/master] url: https://github.com/0day-ci/linux/commits/Tony-Lu/net-smc-Unbind-buffer-si... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 89f971182417cb27abd82cfc48a7f36b99352ddc config: mips-randconfig-r032-20211122 (attached as .config) compiler: mips64el-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/f8b865aff3164098137794ac439371b23... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Tony-Lu/net-smc-Unbind-buffer-size-from-clcsock-and-make-it-tunable/20211122-215118 git checkout f8b865aff3164098137794ac439371b2391c836b # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=mips SHELL=/bin/bash net/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): net/smc/smc_sysctl.c: In function 'smc_sysctl_init_net': 50 | net->smc.smc_hdr = register_net_sysctl(net, "net/smc", table); | ^ net/smc/smc_sysctl.c:51:22: error: 'struct netns_smc' has no member named 'smc_hdr' 51 | if (!net->smc.smc_hdr) | ^ net/smc/smc_sysctl.c: In function 'smc_sysctl_exit_net': net/smc/smc_sysctl.c:65:45: error: 'struct netns_smc' has no member named 'smc_hdr' 65 | unregister_net_sysctl_table(net->smc.smc_hdr); | ^ net/smc/smc_sysctl.c: At top level: net/smc/smc_sysctl.c:73:12: warning: no previous prototype for 'smc_sysctl_init' [-Wmissing-prototypes] 73 | int __init smc_sysctl_init(void) | ^~~~~~~~~~~~~~~ net/smc/smc_sysctl.c:78:6: warning: no previous prototype for 'smc_sysctl_exit' [-Wmissing-prototypes] 78 | void smc_sysctl_exit(void) | ^~~~~~~~~~~~~~~ -- In file included from net/smc/af_smc.c:54: 13 | int smc_sysctl_init(void) | ^~~~~~~~~~~~~~~ 18 | void smc_sysctl_exit(void) { } | ^~~~~~~~~~~~~~~ vim +50 net/smc/smc_sysctl.c 33 34 static __net_init int smc_sysctl_init_net(struct net *net) 35 { 36 struct ctl_table *table; 37 38 table = smc_table; 39 if (!net_eq(net, &init_net)) { 40 int i; 41 42 table = kmemdup(table, sizeof(smc_table), GFP_KERNEL); 43 if (!table) 44 goto err_alloc; 45 46 for (i = 0; i < ARRAY_SIZE(smc_table) - 1; i++) 47 table[i].data += (void *)net - (void *)&init_net; 48 } 49 51 if (!net->smc.smc_hdr) 52 goto err_reg; 53 54 return 0; 55 56 err_reg: 57 if (!net_eq(net, &init_net)) 58 kfree(table); 59 err_alloc: 60 return -ENOMEM; 61 } 62 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org