Re: [RFC PATCH v2 1/3] tracing: Show real address for trace event arguments

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

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Hi Masami,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on tip/perf/core]
[also build test WARNING on trace/for-next linus/master linux/master v5.9 next-20201015]
[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]

url:    https://github.com/0day-ci/linux/commits/Masami-Hiramatsu/tracing-Show-real-address-instead-of-hashed-pointer/20201015-170221
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git f91072ed1b7283b13ca57fcfbece5a3b92726143
config: mips-randconfig-r032-20201014 (attached as .config)
compiler: mips-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/a6a1d5c58f41dfe757e25790b0183ea0a0ff7754
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Masami-Hiramatsu/tracing-Show-real-address-instead-of-hashed-pointer/20201015-170221
        git checkout a6a1d5c58f41dfe757e25790b0183ea0a0ff7754
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   kernel/trace/trace_output.c: In function 'trace_event_printf':
>> kernel/trace/trace_output.c:320:2: warning: function 'trace_event_printf' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format]
     320 |  trace_seq_vprintf(&iter->seq, trace_event_format(iter, fmt), ap);
         |  ^~~~~~~~~~~~~~~~~
   kernel/trace/trace_output.c: In function 'trace_output_raw':
   kernel/trace/trace_output.c:331:2: warning: function 'trace_output_raw' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format]
     331 |  trace_seq_vprintf(s, trace_event_format(iter, fmt), ap);
         |  ^~~~~~~~~~~~~~~~~

vim +320 kernel/trace/trace_output.c

   314	
   315	void trace_event_printf(struct trace_iterator *iter, const char *fmt, ...)
   316	{
   317		va_list ap;
   318	
   319		va_start(ap, fmt);
 > 320		trace_seq_vprintf(&iter->seq, trace_event_format(iter, fmt), ap);
   321		va_end(ap);
   322	}
   323	EXPORT_SYMBOL(trace_event_printf);
   324	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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