Re: [PATCH] Kunit to check the longest symbol length

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Hi Sergio,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.6 next-20231107]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Sergio-Gonz-lez-Collado/Kunit-to-check-the-longest-symbol-length/20231106-024653
base:   linus/master
patch link:    https://lore.kernel.org/r/20231105184010.49194-1-sergio.collado%40gmail.com
patch subject: [PATCH] Kunit to check the longest symbol length
config: sparc-allyesconfig (https://download.01.org/0day-ci/archive/20231108/202311080319.fCEp5dTC-lkp@xxxxxxxxx/config)
compiler: sparc64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231108/202311080319.fCEp5dTC-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/202311080319.fCEp5dTC-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> lib/longest_symbol_kunit.c:16:18: warning: no previous prototype for 'snnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7n' [-Wmissing-prototypes]
      16 | #define DI(name) s##name##name
         |                  ^
   lib/longest_symbol_kunit.c:17:19: note: in expansion of macro 'DI'
      17 | #define DDI(name) DI(n##name##name)
         |                   ^~
   lib/longest_symbol_kunit.c:18:20: note: in expansion of macro 'DDI'
      18 | #define DDDI(name) DDI(n##name##name)
         |                    ^~~
   lib/longest_symbol_kunit.c:19:21: note: in expansion of macro 'DDDI'
      19 | #define DDDDI(name) DDDI(n##name##name)
         |                     ^~~~
   lib/longest_symbol_kunit.c:20:22: note: in expansion of macro 'DDDDI'
      20 | #define DDDDDI(name) DDDDI(n##name##name)
         |                      ^~~~~
   lib/longest_symbol_kunit.c:25:27: note: in expansion of macro 'DDDDDI'
      25 | #define LONGEST_SYM_NAME  DDDDDI(g1h2i3j4k5l6m7n)
         |                           ^~~~~~
   lib/longest_symbol_kunit.c:33:14: note: in expansion of macro 'LONGEST_SYM_NAME'
      33 | noinline int LONGEST_SYM_NAME(void)
         |              ^~~~~~~~~~~~~~~~
   In file included from <command-line>:
   lib/longest_symbol_kunit.c:16:18: warning: no previous prototype for 'snnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7ne' [-Wmissing-prototypes]
      16 | #define DI(name) s##name##name
         |                  ^
   include/linux/compiler_types.h:83:23: note: in definition of macro '___PASTE'
      83 | #define ___PASTE(a,b) a##b
         |                       ^
   lib/longest_symbol_kunit.c:22:21: note: in expansion of macro '__PASTE'
      22 | #define PLUS1(name) __PASTE(name, e)
         |                     ^~~~~~~
   lib/longest_symbol_kunit.c:28:32: note: in expansion of macro 'PLUS1'
      28 | #define LONGEST_SYM_NAME_PLUS1 PLUS1(LONGEST_SYM_NAME)
         |                                ^~~~~
   lib/longest_symbol_kunit.c:17:19: note: in expansion of macro 'DI'
      17 | #define DDI(name) DI(n##name##name)
         |                   ^~
   lib/longest_symbol_kunit.c:18:20: note: in expansion of macro 'DDI'
      18 | #define DDDI(name) DDI(n##name##name)
         |                    ^~~
   lib/longest_symbol_kunit.c:19:21: note: in expansion of macro 'DDDI'
      19 | #define DDDDI(name) DDDI(n##name##name)
         |                     ^~~~
   lib/longest_symbol_kunit.c:20:22: note: in expansion of macro 'DDDDI'
      20 | #define DDDDDI(name) DDDDI(n##name##name)
         |                      ^~~~~
   lib/longest_symbol_kunit.c:25:27: note: in expansion of macro 'DDDDDI'
      25 | #define LONGEST_SYM_NAME  DDDDDI(g1h2i3j4k5l6m7n)
         |                           ^~~~~~
   lib/longest_symbol_kunit.c:28:38: note: in expansion of macro 'LONGEST_SYM_NAME'
      28 | #define LONGEST_SYM_NAME_PLUS1 PLUS1(LONGEST_SYM_NAME)
         |                                      ^~~~~~~~~~~~~~~~
   lib/longest_symbol_kunit.c:38:14: note: in expansion of macro 'LONGEST_SYM_NAME_PLUS1'
      38 | noinline int LONGEST_SYM_NAME_PLUS1(void)
         |              ^~~~~~~~~~~~~~~~~~~~~~


vim +/snnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7n +16 lib/longest_symbol_kunit.c

    15	
  > 16	#define DI(name) s##name##name
    17	#define DDI(name) DI(n##name##name)
    18	#define DDDI(name) DDI(n##name##name)
    19	#define DDDDI(name) DDDI(n##name##name)
    20	#define DDDDDI(name) DDDDI(n##name##name)
    21	

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