kernel/trace/trace_events.c:2102:37: warning: 'ftrace_event_id_fops' defined but not used

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f7757129e3dea336c407551c98f50057c22bb266
commit: 93a4fa622eb061f75f87f0cf9609ab4e69c67d01 LoongArch: Add STACKTRACE support
date:   1 year ago
config: loongarch-randconfig-r014-20230821 (https://download.01.org/0day-ci/archive/20230822/202308220210.4uvlS2Zx-lkp@xxxxxxxxx/config)
compiler: loongarch64-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230822/202308220210.4uvlS2Zx-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/202308220210.4uvlS2Zx-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> kernel/trace/trace_events.c:2102:37: warning: 'ftrace_event_id_fops' defined but not used [-Wunused-const-variable=]
    2102 | static const struct file_operations ftrace_event_id_fops = {
         |                                     ^~~~~~~~~~~~~~~~~~~~
--
   In file included from kernel/locking/lockdep.c:61:
>> kernel/locking/lockdep_internals.h:69:28: warning: 'LOCKF_USED_IN_IRQ_READ' defined but not used [-Wunused-const-variable=]
      69 | static const unsigned long LOCKF_USED_IN_IRQ_READ =
         |                            ^~~~~~~~~~~~~~~~~~~~~~
>> kernel/locking/lockdep_internals.h:63:28: warning: 'LOCKF_ENABLED_IRQ_READ' defined but not used [-Wunused-const-variable=]
      63 | static const unsigned long LOCKF_ENABLED_IRQ_READ =
         |                            ^~~~~~~~~~~~~~~~~~~~~~
>> kernel/locking/lockdep_internals.h:57:28: warning: 'LOCKF_USED_IN_IRQ' defined but not used [-Wunused-const-variable=]
      57 | static const unsigned long LOCKF_USED_IN_IRQ =
         |                            ^~~~~~~~~~~~~~~~~
>> kernel/locking/lockdep_internals.h:51:28: warning: 'LOCKF_ENABLED_IRQ' defined but not used [-Wunused-const-variable=]
      51 | static const unsigned long LOCKF_ENABLED_IRQ =
         |                            ^~~~~~~~~~~~~~~~~


vim +/ftrace_event_id_fops +2102 kernel/trace/trace_events.c

981d081ec8b958 Steven Rostedt 2009-03-02  2101  
23725aeeab10ba Peter Zijlstra 2009-03-19 @2102  static const struct file_operations ftrace_event_id_fops = {
23725aeeab10ba Peter Zijlstra 2009-03-19  2103  	.read = event_id_read,
6038f373a3dc1f Arnd Bergmann  2010-08-15  2104  	.llseek = default_llseek,
23725aeeab10ba Peter Zijlstra 2009-03-19  2105  };
23725aeeab10ba Peter Zijlstra 2009-03-19  2106  

:::::: The code at line 2102 was first introduced by commit
:::::: 23725aeeab10ba02bcf10ec49ad73146b54cb52f ftrace: provide an id file for each event

:::::: TO: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
:::::: CC: Ingo Molnar <mingo@xxxxxxx>

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