linux-kernel - Re: [PATCH v2] tracing: fprobe: use ftrace if CONFIG_DYNAMIC_FTRACE_WITH

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Message-ID: <202511020220.bv169Bd9-lkp@intel.com>
Date: Sun, 2 Nov 2025 02:20:05 +0800
From: kernel test robot <lkp@...el.com>
To: Menglong Dong <menglong8.dong@...il.com>, mhiramat@...nel.org
Cc: oe-kbuild-all@...ts.linux.dev, rostedt@...dmis.org, jolsa@...nel.org,
	mathieu.desnoyers@...icios.com, jiang.biao@...ux.dev,
	linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH v2] tracing: fprobe: use ftrace if
 CONFIG_DYNAMIC_FTRACE_WITH_ARGS

Hi Menglong,

kernel test robot noticed the following build warnings:

[auto build test WARNING on trace/for-next]
[also build test WARNING on next-20251031]
[cannot apply to linus/master v6.18-rc3]
[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/Menglong-Dong/tracing-fprobe-use-ftrace-if-CONFIG_DYNAMIC_FTRACE_WITH_ARGS/20251031-104301
base:   https://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace for-next
patch link:    https://lore.kernel.org/r/20251031024038.19176-1-dongml2%40chinatelecom.cn
patch subject: [PATCH v2] tracing: fprobe: use ftrace if CONFIG_DYNAMIC_FTRACE_WITH_ARGS
config: loongarch-randconfig-002-20251102 (https://download.01.org/0day-ci/archive/20251102/202511020220.bv169Bd9-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251102/202511020220.bv169Bd9-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/202511020220.bv169Bd9-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/trace/fprobe.c:340:13: warning: 'fprobe_set_ips' defined but not used [-Wunused-function]
     340 | static void fprobe_set_ips(unsigned long *ips, unsigned int cnt, int remove,
         |             ^~~~~~~~~~~~~~


vim +/fprobe_set_ips +340 kernel/trace/fprobe.c

   339	
 > 340	static void fprobe_set_ips(unsigned long *ips, unsigned int cnt, int remove,
   341				   int reset)
   342	{
   343		ftrace_set_filter_ips(&fprobe_graph_ops.ops, ips, cnt, remove, reset);
   344		ftrace_set_filter_ips(&fprobe_ftrace_ops, ips, cnt, remove, reset);
   345	}
   346	#else
   347	static int fprobe_ftrace_add_ips(unsigned long *addrs, int num)
   348	{
   349		return -ENOENT;
   350	}
   351	

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