[jimc:dd-shrink-6a5 24/51] lib/dynamic_debug.c:1094:7: error: call to undeclared function 'class_in_range'; ISO C99 and later do not support implicit function declarations

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/jimc/linux.git dd-shrink-6a5
head:   a2f8b47e22fa6a1a9852e392166bc9adf45cc17d
commit: 0b97c67ff7508553279207f049005e69875b9d81 [24/51] dyndbg-API: replace DECLARE_DYNDBG_CLASSMAP
config: x86_64-randconfig-074-20251025 (https://download.01.org/0day-ci/archive/20251026/202510260709.sP8681DF-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251026/202510260709.sP8681DF-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510260709.sP8681DF-lkp@intel.com/

Note: the jimc/dd-shrink-6a5 HEAD a2f8b47e22fa6a1a9852e392166bc9adf45cc17d builds fine.
      It only hurts bisectability.

All errors (new ones prefixed by >>):

>> lib/dynamic_debug.c:1094:7: error: call to undeclared function 'class_in_range'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1094 |                 if (class_in_range(dp->class_id, cli->map))
         |                     ^
   1 error generated.


vim +/class_in_range +1094 lib/dynamic_debug.c

  1082	
  1083	static const char *ddebug_class_name(struct _ddebug_info *di, struct _ddebug *dp)
  1084	{
  1085		struct _ddebug_class_map *map;
  1086		struct _ddebug_class_user *cli;
  1087		int i;
  1088	
  1089		for_subvec(i, map, di, maps)
  1090			if (ddebug_class_in_range(dp->class_id, map))
  1091				return map->class_names[dp->class_id - map->base];
  1092	
  1093		for_subvec(i, cli, di, users)
> 1094			if (class_in_range(dp->class_id, cli->map))
  1095				return cli->map->class_names[dp->class_id - cli->map->base];
  1096	
  1097		return NULL;
  1098	}
  1099	

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