Re: [PATCH] tracing: Add an option to show symbols in _text+offset for function profiler

[kernel test robot <lkp@intel.com>]

Hi Masami,

kernel test robot noticed the following build errors:

[auto build test ERROR on trace/for-next]
[also build test ERROR on linus/master v6.17-rc6 next-20250918]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Masami-Hiramatsu-Google/tracing-Add-an-option-to-show-symbols-in-_text-offset-for-function-profiler/20250919-135733
base:   https://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace for-next
patch link:    https://lore.kernel.org/r/175826135058.101165.7219957344129610147.stgit%40devnote2
patch subject: [PATCH] tracing: Add an option to show symbols in _text+offset for function profiler
config: x86_64-buildonly-randconfig-002-20250919 (https://download.01.org/0day-ci/archive/20250920/202509200000.EJ4InVti-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250920/202509200000.EJ4InVti-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/202509200000.EJ4InVti-lkp@intel.com/

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

   In file included from kernel/trace/trace_sched_switch.c:15:
>> kernel/trace/trace.h:1422:37: warning: left shift count >= width of type [-Wshift-count-overflow]
    1422 | #define C(a, b) TRACE_ITER_##a = (1 << TRACE_ITER_##a##_BIT)
         |                                     ^~
   kernel/trace/trace.h:1358:17: note: in expansion of macro 'C'
    1358 |                 C(PROF_TEXT_OFFSET,     "prof-text-offset"),
         |                 ^
   kernel/trace/trace.h:1402:17: note: in expansion of macro 'PROFILER_FLAGS'
    1402 |                 PROFILER_FLAGS
         |                 ^~~~~~~~~~~~~~
   kernel/trace/trace.h:1424:29: note: in expansion of macro 'TRACE_FLAGS'
    1424 | enum trace_iterator_flags { TRACE_FLAGS };
         |                             ^~~~~~~~~~~
--
   In file included from kernel/trace/trace.c:58:
>> kernel/trace/trace.h:1422:37: warning: left shift count >= width of type [-Wshift-count-overflow]
    1422 | #define C(a, b) TRACE_ITER_##a = (1 << TRACE_ITER_##a##_BIT)
         |                                     ^~
   kernel/trace/trace.h:1358:17: note: in expansion of macro 'C'
    1358 |                 C(PROF_TEXT_OFFSET,     "prof-text-offset"),
         |                 ^
   kernel/trace/trace.h:1402:17: note: in expansion of macro 'PROFILER_FLAGS'
    1402 |                 PROFILER_FLAGS
         |                 ^~~~~~~~~~~~~~
   kernel/trace/trace.h:1424:29: note: in expansion of macro 'TRACE_FLAGS'
    1424 | enum trace_iterator_flags { TRACE_FLAGS };
         |                             ^~~~~~~~~~~
   In file included from <command-line>:
   In function 'tracer_alloc_buffers',
       inlined from 'early_trace_init' at kernel/trace/trace.c:11144:2:
>> include/linux/compiler_types.h:572:45: error: call to '__compiletime_assert_557' declared with attribute error: BUILD_BUG_ON failed: TRACE_ITER_LAST_BIT > TRACE_FLAGS_MAX_SIZE
     572 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:553:25: note: in definition of macro '__compiletime_assert'
     553 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:572:9: note: in expansion of macro '_compiletime_assert'
     572 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
      39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:50:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      50 |         BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
         |         ^~~~~~~~~~~~~~~~
   kernel/trace/trace.c:10983:9: note: in expansion of macro 'BUILD_BUG_ON'
   10983 |         BUILD_BUG_ON(TRACE_ITER_LAST_BIT > TRACE_FLAGS_MAX_SIZE);
         |         ^~~~~~~~~~~~


vim +1422 kernel/trace/trace.h

a3418a364ec3c8f Steven Rostedt (Red Hat  2015-09-29  1416) 
a3418a364ec3c8f Steven Rostedt (Red Hat  2015-09-29  1417) /*
a3418a364ec3c8f Steven Rostedt (Red Hat  2015-09-29  1418)  * By redefining C, we can make TRACE_FLAGS a list of masks that
a3418a364ec3c8f Steven Rostedt (Red Hat  2015-09-29  1419)  * use the bits as defined above.
a3418a364ec3c8f Steven Rostedt (Red Hat  2015-09-29  1420)  */
a3418a364ec3c8f Steven Rostedt (Red Hat  2015-09-29  1421) #undef C
a3418a364ec3c8f Steven Rostedt (Red Hat  2015-09-29 @1422) #define C(a, b) TRACE_ITER_##a = (1 << TRACE_ITER_##a##_BIT)
a3418a364ec3c8f Steven Rostedt (Red Hat  2015-09-29  1423) 

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