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* [android-common:android15-6.6 1/1] include/trace/stages/init.h:2:23: warning: 'str__lz4_decompress__trace_system_name' defined but not used
@ 2026-03-18 20:28 kernel test robot
  0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-03-18 20:28 UTC (permalink / raw)
  To: cros-kernel-buildreports; +Cc: oe-kbuild-all

Hi liujinbao1,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android15-6.6
head:   9129a20e2343292daee253ef8f31e94b42fac726
commit: 7917a1e0dd58c7031fc3bc968c07d2f4f0a719cd [1/1] ANDROID: erofs: create vendor hooks for decompress
config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20260319/202603190447.hAg4Pr0f-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260319/202603190447.hAg4Pr0f-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/202603190447.hAg4Pr0f-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/gic.h:24,
                    from drivers/android/vendor_hooks.c:41:
   include/trace/stages/init.h:2:23: warning: 'str__gic__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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/syscall_check.h:36,
                    from drivers/android/vendor_hooks.c:40:
   include/trace/stages/init.h:2:23: warning: 'str__syscall_check__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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/selinux.h:20,
                    from drivers/android/vendor_hooks.c:39:
   include/trace/stages/init.h:2:23: warning: 'str__selinux__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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/creds.h:33,
                    from drivers/android/vendor_hooks.c:38:
   include/trace/stages/init.h:2:23: warning: 'str__creds__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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/avc.h:32,
                    from drivers/android/vendor_hooks.c:37:
   include/trace/stages/init.h:2:23: warning: 'str__avc__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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/lz4_decompress.h:21,
                    from drivers/android/vendor_hooks.c:36:
>> include/trace/stages/init.h:2:23: warning: 'str__lz4_decompress__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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/vmscan.h:88,
                    from drivers/android/vendor_hooks.c:35:
   include/trace/stages/init.h:2:23: warning: 'str__vmscan__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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/cpuidle_psci.h:24,
                    from drivers/android/vendor_hooks.c:34:
   include/trace/stages/init.h:2:23: warning: 'str__cpuidle_psci__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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/net.h:92,
                    from drivers/android/vendor_hooks.c:33:
   include/trace/stages/init.h:2:23: warning: 'str__net__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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/iommu.h:54,
                    from drivers/android/vendor_hooks.c:32:
   include/trace/stages/init.h:2:23: warning: 'str__iommu__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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/madvise.h:30,
                    from drivers/android/vendor_hooks.c:31:
   include/trace/stages/init.h:2:23: warning: 'str__madvise__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)
         |                     ^~~~~~~


vim +/str__lz4_decompress__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>

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

^ permalink raw reply	[flat|nested] 2+ messages in thread

* [android-common:android15-6.6 1/1] include/trace/stages/init.h:2:23: warning: 'str__lz4_decompress__trace_system_name' defined but not used
@ 2026-10-13  9:05 kernel test robot
  0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-10-13  9:05 UTC (permalink / raw)
  To: cros-kernel-buildreports; +Cc: oe-kbuild-all

Hi liujinbao1,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android15-6.6
head:   0670949d6852a5c556e94abd6e62b945e30d41db
commit: 7917a1e0dd58c7031fc3bc968c07d2f4f0a719cd [1/1] ANDROID: erofs: create vendor hooks for decompress
config: arm-randconfig-r2102-20261012 (https://download.01.org/0day-ci/archive/20261013/202610131017.DgdWkhOx-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261013/202610131017.DgdWkhOx-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/202610131017.DgdWkhOx-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/gic.h:24,
                    from drivers/android/vendor_hooks.c:41:
   include/trace/stages/init.h:2:23: warning: 'str__gic__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:8:20: 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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/syscall_check.h:36,
                    from drivers/android/vendor_hooks.c:40:
   include/trace/stages/init.h:2:23: warning: 'str__syscall_check__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:8:20: 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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/selinux.h:20,
                    from drivers/android/vendor_hooks.c:39:
   include/trace/stages/init.h:2:23: warning: 'str__selinux__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:8:20: 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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/creds.h:33,
                    from drivers/android/vendor_hooks.c:38:
   include/trace/stages/init.h:2:23: warning: 'str__creds__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:8:20: 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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/avc.h:32,
                    from drivers/android/vendor_hooks.c:37:
   include/trace/stages/init.h:2:23: warning: 'str__avc__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:8:20: 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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/lz4_decompress.h:21,
                    from drivers/android/vendor_hooks.c:36:
>> include/trace/stages/init.h:2:23: warning: 'str__lz4_decompress__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:8:20: 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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/vmscan.h:88,
                    from drivers/android/vendor_hooks.c:35:
   include/trace/stages/init.h:2:23: warning: 'str__vmscan__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:8:20: 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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/cpuidle_psci.h:24,
                    from drivers/android/vendor_hooks.c:34:
   include/trace/stages/init.h:2:23: warning: 'str__cpuidle_psci__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:8:20: 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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/net.h:92,
                    from drivers/android/vendor_hooks.c:33:
   include/trace/stages/init.h:2:23: warning: 'str__net__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:8:20: 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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/iommu.h:54,
                    from drivers/android/vendor_hooks.c:32:
   include/trace/stages/init.h:2:23: warning: 'str__iommu__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:8:20: 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();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/trace_events.h:27,
                    from include/trace/define_trace.h:102,
                    from include/trace/hooks/madvise.h:30,
                    from drivers/android/vendor_hooks.c:31:
   include/trace/stages/init.h:2:23: warning: 'str__madvise__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)
         |                     ^~~~~~~


vim +/str__lz4_decompress__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>

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

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