linux-kernel - Re: [PATCH perf/core 03/11] perf: Add support to attach standard unique uprobe

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Message-ID: <202509031116.yIcyjvUx-lkp@intel.com>
Date: Wed, 3 Sep 2025 11:32:22 +0800
From: kernel test robot <lkp@...el.com>
To: Jiri Olsa <jolsa@...nel.org>, Oleg Nesterov <oleg@...hat.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Andrii Nakryiko <andrii@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
	x86@...nel.org, Song Liu <songliubraving@...com>,
	Yonghong Song <yhs@...com>,
	John Fastabend <john.fastabend@...il.com>,
	Hao Luo <haoluo@...gle.com>, Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH perf/core 03/11] perf: Add support to attach standard
 unique uprobe

Hi Jiri,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tip/perf/core]
[also build test WARNING on next-20250902]
[cannot apply to bpf-next/net bpf-next/master bpf/master perf-tools-next/perf-tools-next perf-tools/perf-tools trace/for-next linus/master acme/perf/core v6.17-rc4]
[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/Jiri-Olsa/uprobes-Add-unique-flag-to-uprobe-consumer/20250902-224356
base:   tip/perf/core
patch link:    https://lore.kernel.org/r/20250902143504.1224726-4-jolsa%40kernel.org
patch subject: [PATCH perf/core 03/11] perf: Add support to attach standard unique uprobe
config: x86_64-randconfig-001-20250903 (https://download.01.org/0day-ci/archive/20250903/202509031116.yIcyjvUx-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250903/202509031116.yIcyjvUx-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509031116.yIcyjvUx-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/linux/trace_events.h:10,
                    from include/trace/syscall.h:7,
                    from include/linux/syscalls.h:95,
                    from kernel/events/core.c:34:
>> include/linux/perf_event.h:2073:32: warning: 'format_attr_unique' defined but not used [-Wunused-variable]
    2073 | static struct device_attribute format_attr_##_name = __ATTR_RO(_name)
         |                                ^~~~~~~~~~~~
   kernel/events/core.c:11055:1: note: in expansion of macro 'PMU_FORMAT_ATTR'
   11055 | PMU_FORMAT_ATTR(unique, "config:1");
         | ^~~~~~~~~~~~~~~


vim +/format_attr_unique +2073 include/linux/perf_event.h

b6c00fb9949fbd0 Kan Liang 2023-01-04  2069  
b6c00fb9949fbd0 Kan Liang 2023-01-04  2070  #define PMU_FORMAT_ATTR(_name, _format)					\
b6c00fb9949fbd0 Kan Liang 2023-01-04  2071  	PMU_FORMAT_ATTR_SHOW(_name, _format)				\
641cc938815dfd0 Jiri Olsa 2012-03-15  2072  									\
641cc938815dfd0 Jiri Olsa 2012-03-15 @2073  static struct device_attribute format_attr_##_name = __ATTR_RO(_name)
641cc938815dfd0 Jiri Olsa 2012-03-15  2074  

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