[openeuler:OLK-6.6 1841/1841] include/trace/stages/init.h:2:23: warning: 'str__bonding__trace_system_name' defined but not used

[openeuler:OLK-6.6 1841/1841] include/trace/stages/init.h:2:23: warning: 'str__bonding__trace_system_name' defined but not used

[kernel test robot]

Hi Wei,

FYI, the error/warning still remains.

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   1b973c5f4ead8093d8018eb8c3aad83f34724173
commit: 69ddcb21328bd29cfd2f64710bdac158f4c90bf6 [1841/1841] drivers: hooks: add bonding driver vendor hooks
config: loongarch-allyesconfig (https://download.01.org/0day-ci/archive/20250124/202501241646.6wTHZP2L-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250124/202501241646.6wTHZP2L-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/202501241646.6wTHZP2L-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/bonding.h:27,
                    from drivers/hooks/vendor_hooks.c:11:
>> include/trace/stages/init.h:2:23: warning: 'str__bonding__trace_system_name' defined but not used [-Wunused-const-variable=]
       2 | #define __app__(x, y) str__##x##y
         |                       ^~~~~
   include/trace/stages/init.h:3:21: note: in expansion of macro '__app__'
       3 | #define __app(x, y) __app__(x, y)
         |                     ^~~~~~~
   include/trace/stages/init.h:5:29: note: in expansion of macro '__app'
       5 | #define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
         |                             ^~~~~
   include/trace/stages/init.h:8:27: note: in expansion of macro 'TRACE_SYSTEM_STRING'
       8 |         static const char TRACE_SYSTEM_STRING[] =       \
         |                           ^~~~~~~~~~~~~~~~~~~
   include/trace/stages/init.h:11:1: note: in expansion of macro 'TRACE_MAKE_SYSTEM_STR'
      11 | TRACE_MAKE_SYSTEM_STR();
         | ^~~~~~~~~~~~~~~~~~~~~


vim +/str__bonding__trace_system_name +2 include/trace/stages/init.h

af6b9668e85ffd Steven Rostedt (Google  2022-03-03 @2) #define __app__(x, y) str__##x##y
af6b9668e85ffd Steven Rostedt (Google  2022-03-03  3) #define __app(x, y) __app__(x, y)
af6b9668e85ffd Steven Rostedt (Google  2022-03-03  4) 

:::::: The code at line 2 was first introduced by commit
:::::: af6b9668e85ffd1502aada8036ccbf4dbd481708 tracing: Move the defines to create TRACE_EVENTS into their own files

:::::: TO: Steven Rostedt (Google) <rostedt@goodmis.org>
:::::: CC: Steven Rostedt (Google) <rostedt@goodmis.org>

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https://github.com/intel/lkp-tests/wiki