[android-common:android14-5.15-2026-01 2/2] include/trace/trace_events.h:27:23: warning: 'str__bl_hib__trace_system_name' defined but not used

kernel test robot <[email protected]>
Newsgroups dev.linux.lists.oe-kbuild-all
Message-ID <[email protected]> 
Hi Shreyas,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android14-5.15-2026-01
head:   9ec15dfb25fd3b1383c343c4d7e2d8d92a5635dc
commit: 7fec6d61ccfe5f21bb3ca7b298541e6029866d66 [2/2] ANDROID: vendor hooks: Add hooks to support bootloader based hibernation
config: arm64-randconfig-004-20260813 (https://download.01.org/0day-ci/archive/20260816/[email protected]/config)
compiler: aarch64-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260816/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All warnings (new ones prefixed by >>):

   In file included from include/trace/define_trace.h:102,
                    from include/trace/hooks/bl_hib.h:28,
                    from drivers/android/vendor_hooks.c:80:
>> include/trace/trace_events.h:27:23: warning: 'str__bl_hib__trace_system_name' defined but not used [-Wunused-const-variable=]
      27 | #define __app__(x, y) str__##x##y
         |                       ^~~~~
   include/trace/trace_events.h:28:21: note: in expansion of macro '__app__'
      28 | #define __app(x, y) __app__(x, y)
         |                     ^~~~~~~
   include/trace/trace_events.h:30:29: note: in expansion of macro '__app'
      30 | #define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
         |                             ^~~~~
   include/trace/trace_events.h:33:27: note: in expansion of macro 'TRACE_SYSTEM_STRING'
      33 |         static const char TRACE_SYSTEM_STRING[] =       \
         |                           ^~~~~~~~~~~~~~~~~~~
   include/trace/trace_events.h:36:1: note: in expansion of macro 'TRACE_MAKE_SYSTEM_STR'
      36 | TRACE_MAKE_SYSTEM_STR();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/define_trace.h:102,
                    from include/trace/hooks/delayacct.h:65,
                    from drivers/android/vendor_hooks.c:79:
   include/trace/trace_events.h:27:23: warning: 'str__delayacct__trace_system_name' defined but not used [-Wunused-const-variable=]
      27 | #define __app__(x, y) str__##x##y
         |                       ^~~~~
   include/trace/trace_events.h:28:21: note: in expansion of macro '__app__'
      28 | #define __app(x, y) __app__(x, y)
         |                     ^~~~~~~
   include/trace/trace_events.h:30:29: note: in expansion of macro '__app'
      30 | #define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
         |                             ^~~~~
   include/trace/trace_events.h:33:27: note: in expansion of macro 'TRACE_SYSTEM_STRING'
      33 |         static const char TRACE_SYSTEM_STRING[] =       \
         |                           ^~~~~~~~~~~~~~~~~~~
   include/trace/trace_events.h:36:1: note: in expansion of macro 'TRACE_MAKE_SYSTEM_STR'
      36 | TRACE_MAKE_SYSTEM_STR();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/define_trace.h:102,
                    from include/trace/hooks/user.h:21,
                    from drivers/android/vendor_hooks.c:78:
   include/trace/trace_events.h:27:23: warning: 'str__user__trace_system_name' defined but not used [-Wunused-const-variable=]
      27 | #define __app__(x, y) str__##x##y
         |                       ^~~~~
   include/trace/trace_events.h:28:21: note: in expansion of macro '__app__'
      28 | #define __app(x, y) __app__(x, y)
         |                     ^~~~~~~
   include/trace/trace_events.h:30:29: note: in expansion of macro '__app'
      30 | #define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
         |                             ^~~~~
   include/trace/trace_events.h:33:27: note: in expansion of macro 'TRACE_SYSTEM_STRING'
      33 |         static const char TRACE_SYSTEM_STRING[] =       \
         |                           ^~~~~~~~~~~~~~~~~~~
   include/trace/trace_events.h:36:1: note: in expansion of macro 'TRACE_MAKE_SYSTEM_STR'
      36 | TRACE_MAKE_SYSTEM_STR();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/define_trace.h:102,
                    from include/trace/hooks/sound.h:18,
                    from drivers/android/vendor_hooks.c:77:
   include/trace/trace_events.h:27:23: warning: 'str__sound__trace_system_name' defined but not used [-Wunused-const-variable=]
      27 | #define __app__(x, y) str__##x##y
         |                       ^~~~~
   include/trace/trace_events.h:28:21: note: in expansion of macro '__app__'
      28 | #define __app(x, y) __app__(x, y)
         |                     ^~~~~~~
   include/trace/trace_events.h:30:29: note: in expansion of macro '__app'
      30 | #define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
         |                             ^~~~~
   include/trace/trace_events.h:33:27: note: in expansion of macro 'TRACE_SYSTEM_STRING'
      33 |         static const char TRACE_SYSTEM_STRING[] =       \
         |                           ^~~~~~~~~~~~~~~~~~~
   include/trace/trace_events.h:36:1: note: in expansion of macro 'TRACE_MAKE_SYSTEM_STR'
      36 | TRACE_MAKE_SYSTEM_STR();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/define_trace.h:102,
                    from include/trace/hooks/typec.h:59,
                    from drivers/android/vendor_hooks.c:76:
   include/trace/trace_events.h:27:23: warning: 'str__typec__trace_system_name' defined but not used [-Wunused-const-variable=]
      27 | #define __app__(x, y) str__##x##y
         |                       ^~~~~
   include/trace/trace_events.h:28:21: note: in expansion of macro '__app__'
      28 | #define __app(x, y) __app__(x, y)
         |                     ^~~~~~~
   include/trace/trace_events.h:30:29: note: in expansion of macro '__app'
      30 | #define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
         |                             ^~~~~
   include/trace/trace_events.h:33:27: note: in expansion of macro 'TRACE_SYSTEM_STRING'
      33 |         static const char TRACE_SYSTEM_STRING[] =       \
         |                           ^~~~~~~~~~~~~~~~~~~
   include/trace/trace_events.h:36:1: note: in expansion of macro 'TRACE_MAKE_SYSTEM_STR'
      36 | TRACE_MAKE_SYSTEM_STR();
         | ^~~~~~~~~~~~~~~~~~~~~
   In file included from include/trace/define_trace.h:102,
                    from include/trace/hooks/suspend.h:26,
                    from drivers/android/vendor_hooks.c:75:
   include/trace/trace_events.h:27:23: warning: 'str__suspend__trace_system_name' defined but not used [-Wunused-const-variable=]
      27 | #define __app__(x, y) str__##x##y
         |                       ^~~~~
   include/trace/trace_events.h:28:21: note: in expansion of macro '__app__'
      28 | #define __app(x, y) __app__(x, y)
         |                     ^~~~~~~
   include/trace/trace_events.h:30:29: note: in expansion of macro '__app'
      30 | #define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
         |                             ^~~~~
   include/trace/trace_events.h:33:27: note: in expansion of macro 'TRACE_SYSTEM_STRING'
      33 |         static const char TRACE_SYSTEM_STRING[] =       \

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for WIRELESS_EXT
   Depends on [n]: NET [=n] && WIRELESS [=n]
   Selected by [y]:
   - GKI_LEGACY_WEXT_ALLCONFIG [=y]
   WARNING: unmet direct dependencies detected for WEXT_CORE
   Depends on [n]: NET [=n] && WIRELESS [=n] && (CFG80211_WEXT [=n] || WIRELESS_EXT [=y])
   Selected by [y]:
   - GKI_LEGACY_WEXT_ALLCONFIG [=y]
   WARNING: unmet direct dependencies detected for NET_PTP_CLASSIFY
   Depends on [n]: NET [=n]
   Selected by [y]:
   - GKI_HIDDEN_NET_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for WEXT_PROC
   Depends on [n]: NET [=n] && WIRELESS [=n] && PROC_FS [=y] && WEXT_CORE [=y]
   Selected by [y]:
   - GKI_LEGACY_WEXT_ALLCONFIG [=y]
   WARNING: unmet direct dependencies detected for WEXT_PRIV
   Depends on [n]: NET [=n] && WIRELESS [=n]
   Selected by [y]:
   - GKI_LEGACY_WEXT_ALLCONFIG [=y]
   WARNING: unmet direct dependencies detected for PAGE_POOL
   Depends on [n]: NET [=n]
   Selected by [y]:
   - GKI_HIDDEN_NET_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for WEXT_SPY
   Depends on [n]: NET [=n] && WIRELESS [=n]
   Selected by [y]:
   - GKI_LEGACY_WEXT_ALLCONFIG [=y]


vim +/str__bl_hib__trace_system_name +27 include/trace/trace_events.h

acd388fd3af350 include/trace/ftrace.h Steven Rostedt (Red Hat  2015-03-31  26) 
acd388fd3af350 include/trace/ftrace.h Steven Rostedt (Red Hat  2015-03-31 @27) #define __app__(x, y) str__##x##y
acd388fd3af350 include/trace/ftrace.h Steven Rostedt (Red Hat  2015-03-31  28) #define __app(x, y) __app__(x, y)
acd388fd3af350 include/trace/ftrace.h Steven Rostedt (Red Hat  2015-03-31  29) 

:::::: The code at line 27 was first introduced by commit
:::::: acd388fd3af350ab24c6ab6f19b83fc4a4f3aa60 tracing: Give system name a pointer

:::::: TO: Steven Rostedt (Red Hat) <[email protected]>
:::::: CC: Steven Rostedt <[email protected]>

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