linux-kernel - Re: [PATCH v4 04/12] kernel: ftrace: export ftrace_sync

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Message-ID: <202504090657.5fiH4UIS-lkp@intel.com>
Date: Wed, 9 Apr 2025 06:31:49 +0800
From: kernel test robot <lkp@...el.com>
To: Andy Chiu <andybnac@...il.com>, linux-riscv@...ts.infradead.org,
	alexghiti@...osinc.com, palmer@...belt.com
Cc: oe-kbuild-all@...ts.linux.dev, Andy Chiu <andybnac@...il.com>,
	linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
	Mark Rutland <mark.rutland@....com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Alexandre Ghiti <alex@...ti.fr>, bjorn@...osinc.com,
	puranjay12@...il.com, paul.walmsley@...ive.com,
	greentime.hu@...ive.com, nick.hu@...ive.com, nylon.chen@...ive.com,
	eric.lin@...ive.com, vicent.chen@...ive.com, zong.li@...ive.com,
	yongxuan.wang@...ive.com, samuel.holland@...ive.com,
	olivia.chu@...ive.com, c2232430@...il.com
Subject: Re: [PATCH v4 04/12] kernel: ftrace: export ftrace_sync_ipi

Hi Andy,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.15-rc1 next-20250408]
[cannot apply to trace/for-next]
[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/Andy-Chiu/riscv-ftrace-factor-out-code-defined-by-WITH_ARG/20250408-025114
base:   linus/master
patch link:    https://lore.kernel.org/r/20250407180838.42877-4-andybnac%40gmail.com
patch subject: [PATCH v4 04/12] kernel: ftrace: export ftrace_sync_ipi
config: xtensa-randconfig-001-20250409 (https://download.01.org/0day-ci/archive/20250409/202504090657.5fiH4UIS-lkp@intel.com/config)
compiler: xtensa-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250409/202504090657.5fiH4UIS-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/202504090657.5fiH4UIS-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/trace/ftrace.c:191:6: warning: no previous prototype for 'ftrace_sync_ipi' [-Wmissing-prototypes]
     191 | void ftrace_sync_ipi(void *data)
         |      ^~~~~~~~~~~~~~~


vim +/ftrace_sync_ipi +191 kernel/trace/ftrace.c

   190	
 > 191	void ftrace_sync_ipi(void *data)
   192	{
   193		/* Probably not needed, but do it anyway */
   194		smp_rmb();
   195	}
   196	

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