tree: https://github.com/jimc/linux.git dd-drm-4d head: 6ffb90a167c272a6a58f37bb5386e0cdcb7ba782 commit: e8f610cf4d272528ca10b080b749ef8086b71b7d [3/9] dyndbg: add DEFINE_DYNAMIC_DEBUG_CATEGORIES and callbacks config: ia64-randconfig-r001-20210811 (attached as .config) compiler: ia64-linux-gcc (GCC) 10.3.0 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/jimc/linux/commit/e8f610cf4d272528ca10b080b749ef8086b7... git remote add jimc https://github.com/jimc/linux.git git fetch --no-tags jimc dd-drm-4d git checkout e8f610cf4d272528ca10b080b749ef8086b71b7d # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=ia64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): lib/dynamic_debug.c: In function 'param_set_dyndbg': 1187 | chgct = dynamic_debug_exec_queries(query, kp->mod->name); | ^~ At top level: lib/dynamic_debug.c:936:30: warning: 'proc_fops' defined but not used [-Wunused-const-variable=] 936 | static const struct proc_ops proc_fops = { | ^~~~~~~~~ vim +1187 lib/dynamic_debug.c 1161 1162 /** 1163 * param_set_dyndbg() - drm.debug style bitmap to format-prefix categories 1164 * @instr: string echo>d to sysfs 1165 * @kp: struct kernel_param* ->data has bitmap 1166 * Exported to support DEFINE_DYNAMIC_DEBUG_CATEGORIES 1167 */ 1168 int param_set_dyndbg(const char *instr, const struct kernel_param *kp) 1169 { 1170 unsigned long inbits; 1171 int rc, i, chgct = 0, totct = 0; 1172 char query[OUR_QUERY_SIZE]; 1173 struct dyndbg_bitdesc *bitmap = (struct dyndbg_bitdesc *) kp->data; 1174 1175 rc = kstrtoul(instr, 0, &inbits); 1176 if (rc) { 1177 pr_err("set_dyndbg: failed\n"); 1178 return -EINVAL; 1179 } 1180 vpr_info("set_dyndbg: input 0x%lx\n", inbits); 1181 1182 for (i = 0; !!bitmap[i].prefix; i++) { 1183 1184 sprintf(query, "format '^%s' %cp", bitmap[i].prefix, 1185 test_bit(i, &inbits) ? '+' : '-'); 1186 1188 1189 v2pr_info("bit-%d: %d changes by '%s'\n", i, chgct, query); 1190 totct += chgct; 1191 } 1192 vpr_info("total changes: %d\n", totct); 1193 return 0; 1194 } 1195 EXPORT_SYMBOL(param_set_dyndbg); 1196 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org