Hi Marcos,

kernel test robot noticed the following build errors:

[auto build test ERROR on d0b3b7b22dfa1f4b515fd3a295b3fd958f9e81af]

url:    
https://github.com/intel-lab-lkp/linux/commits/Marcos-Paulo-de-Souza/printk-nbcon-Export-console_is_usage-and-other-nbcon-symbols/20250713-131106
base:   d0b3b7b22dfa1f4b515fd3a295b3fd958f9e81af
patch link:    
https://lore.kernel.org/r/20250713-nbcon-kgdboc-v1-1-51eccd9247a8%40suse.com
patch subject: [PATCH 1/2] printk: nbcon: Export console_is_usage and other 
nbcon symbols
config: i386-buildonly-randconfig-004-20250713 
(https://download.01.org/0day-ci/archive/20250713/202507131412.lfp8uefp-...@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0
reproduce (this is a W=1 build): 
(https://download.01.org/0day-ci/archive/20250713/202507131412.lfp8uefp-...@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 <l...@intel.com>
| Closes: 
https://lore.kernel.org/oe-kbuild-all/202507131412.lfp8uefp-...@intel.com/

All error/warnings (new ones prefixed by >>):

   In file included from kernel/panic.c:32:
   include/linux/console.h: In function 'nbcon_context_try_acquire':
>> include/linux/console.h:653:53: warning: no return statement in function 
>> returning non-void [-Wreturn-type]
     653 | static inline bool nbcon_context_try_acquire(struct nbcon_context 
*ctxt) { }
         |                                                     ^~~~~~~~~~~~~
--
   In file included from kernel/printk/printk.c:26:
   include/linux/console.h: In function 'nbcon_context_try_acquire':
>> include/linux/console.h:653:53: warning: no return statement in function 
>> returning non-void [-Wreturn-type]
     653 | static inline bool nbcon_context_try_acquire(struct nbcon_context 
*ctxt) { }
         |                                                     ^~~~~~~~~~~~~
   In file included from kernel/printk/printk.c:62:
   kernel/printk/internal.h: At top level:
>> kernel/printk/internal.h:165:20: error: redefinition of 'console_is_usable'
     165 | static inline bool console_is_usable(struct console *con, short 
flags,
         |                    ^~~~~~~~~~~~~~~~~
   include/linux/console.h:661:20: note: previous definition of 
'console_is_usable' with type 'bool(struct console *, short int,  bool)' {aka 
'_Bool(struct console *, short int,  _Bool)'}
     661 | static inline bool console_is_usable(struct console *con, short 
flags,
         |                    ^~~~~~~~~~~~~~~~~


vim +/console_is_usable +165 kernel/printk/internal.h

6b93bb41f6eaa1 Thomas Gleixner 2023-09-16  164  
6cb58cfebb2932 John Ogness     2024-09-04 @165  static inline bool 
console_is_usable(struct console *con, short flags,
6cb58cfebb2932 John Ogness     2024-09-04  166                                  
     bool use_atomic) { return false; }
864c25c83d834b John Ogness     2024-08-20  167  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki


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