tree:   https://github.com/jimc/linux.git hf-5h
head:   973cbca759843f96e28cf905d93c06305076f4fd
commit: 998038ec632fe638bfe712840689720093c1e24e [13/22] dyndbg-API: specialize DYNDBG_CLASSMAP_(DEFINE|USE)
config: m68k-allmodconfig
compiler: m68k-linux-gcc (GCC) 12.1.0
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/998038ec632fe638bfe712840689720093c1e24e
        git remote add jimc https://github.com/jimc/linux.git
        git fetch --no-tags jimc hf-5h
        git checkout 998038ec632fe638bfe712840689720093c1e24e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

Note: the jimc/hf-5h HEAD 973cbca759843f96e28cf905d93c06305076f4fd builds fine.
      It only hurts bisectability.

All errors (new ones prefixed by >>):

   lib/dynamic_debug.c: In function '__ddebug_add_module':
>> lib/dynamic_debug.c:1395:9: error: implicit declaration of function 'ddebug_sanity' [-Werror=implicit-function-declaration]
    1395 |         ddebug_sanity(di);
         |         ^~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/ddebug_sanity +1395 lib/dynamic_debug.c

  1351	
  1352	/*
  1353	 * Allocate a new ddebug_table for the given module
  1354	 * and add it to the global list.
  1355	 */
  1356	static int __ddebug_add_module(struct _ddebug_info *di, unsigned int base,
  1357				       const char *modname)
  1358	{
  1359		struct ddebug_table *dt;
  1360	
  1361		v3pr_info("add-module: %s %d sites %d.%d\n", modname, di->num_descs,
  1362			  di->num_classes, di->num_class_refs);
  1363		if (!di->num_descs) {
  1364			v3pr_info(" skip %s\n", modname);
  1365			return 0;
  1366		}
  1367	
  1368		dt = kzalloc(sizeof(*dt), GFP_KERNEL);
  1369		if (dt == NULL) {
  1370			pr_err("error adding module: %s\n", modname);
  1371			return -ENOMEM;
  1372		}
  1373		/*
  1374		 * For built-in modules, name lives in .rodata and is
  1375		 * immortal. For loaded modules, name points at the name[]
  1376		 * member of struct module, which lives at least as long as
  1377		 * this struct ddebug_table.
  1378		 */
  1379		dt->mod_name = modname;
  1380		dt->ddebugs = di->descs;
  1381		dt->num_ddebugs = di->num_descs;
  1382	
  1383		INIT_LIST_HEAD(&dt->link);
  1384	
  1385		if (di->num_classes)
  1386			ddebug_attach_module_classes(dt, di);
  1387	
  1388		mutex_lock(&ddebug_lock);
  1389		list_add_tail(&dt->link, &ddebug_tables);
  1390		mutex_unlock(&ddebug_lock);
  1391	
  1392		if (di->num_class_refs)
  1393			ddebug_attach_client_module_classes(dt, di);
  1394	
> 1395		ddebug_sanity(di);
  1396	
  1397		vpr_info("%3u debug prints in module %s\n", di->num_descs, modname);
  1398		return 0;
  1399	}
  1400	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp