* Re: [PATCH v5 2/3] tracing: Add a tracepoint verification check at build time
[not found] <20250725025213.342188378@kernel.org>
@ 2025-07-26 10:36 ` kernel test robot
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From: kernel test robot @ 2025-07-26 10:36 UTC (permalink / raw)
To: Steven Rostedt, linux-kernel, linux-trace-kernel, linux-kbuild,
llvm
Cc: oe-kbuild-all, Masami Hiramatsu, Mark Rutland, Mathieu Desnoyers,
Andrew Morton, Linux Memory Management List, Arnd Bergmann,
Masahiro Yamada, Nathan Chancellor, Nicolas Schier,
Nick Desaulniers, Catalin Marinas
Hi Steven,
kernel test robot noticed the following build warnings:
[auto build test WARNING on masahiroy-kbuild/for-next]
[also build test WARNING on masahiroy-kbuild/fixes trace/for-next arnd-asm-generic/master linus/master v6.16-rc7 next-20250725]
[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/Steven-Rostedt/sorttable-Move-ELF-parsing-into-scripts-elf-parse-ch/20250725-105526
base: https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git for-next
patch link: https://lore.kernel.org/r/20250725025213.342188378%40kernel.org
patch subject: [PATCH v5 2/3] tracing: Add a tracepoint verification check at build time
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20250726/202507261823.mtwUpXNM-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250726/202507261823.mtwUpXNM-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/202507261823.mtwUpXNM-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> scripts/tracepoint-update.c:106:6: warning: variable 'count' set but not used [-Wunused-but-set-variable]
106 | int count = 0;
| ^
1 warning generated.
--
>> scripts/tracepoint-update.c:106:6: warning: variable 'count' set but not used [-Wunused-but-set-variable]
106 | int count = 0;
| ^
1 warning generated.
vim +/count +106 scripts/tracepoint-update.c
102
103 static void check_tracepoints(struct elf_tracepoint *etrace)
104 {
105 Elf_Ehdr *ehdr = etrace->ehdr;
> 106 int count = 0;
107 int len;
108
109 if (!etrace->array)
110 return;
111
112 for_each_shdr_str(len, ehdr, tracepoint_data_sec) {
113 if (!len)
114 continue;
115 if (!find_event(str, etrace->array, etrace->count)) {
116 fprintf(stderr, "warning: tracepoint '%s' is unused.\n", str);
117 }
118 count++;
119 }
120
121 free(etrace->array);
122 }
123
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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