Re: [PATCH] tracing: Add saved_tgids file to show cached pid to tgid mappings

[kbuild test robot]

Hi Michael,

[auto build test ERROR on trace/for-next]
[also build test ERROR on next-20170630]
[cannot apply to tip/perf/core linus/master v4.12-rc7]
[if your patch is applied to the wrong git tree, please drop us a note to help 
improve the system]

url:    
https://github.com/0day-ci/linux/commits/Michael-Sartain/tracing-Add-saved_tgids-file-to-show-cached-pid-to-tgid-mappings/20170702-092448
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git 
for-next
config: i386-randconfig-x070-07010433 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   kernel//trace/trace.c: In function 'saved_cmdlines_next':
>> kernel//trace/trace.c:4612:22: error: implicit declaration of function 
>> 'trace_find_tgid' [-Werror=implicit-function-declaration]
      if (tgid_check && !trace_find_tgid(*ptr))
                         ^~~~~~~~~~~~~~~
   kernel//trace/trace.c: In function 'saved_cmdlines_start':
>> kernel//trace/trace.c:4627:21: error: 'tgid_map' undeclared (first use in 
>> this function)
     if (tgid_check && !tgid_map)
                        ^~~~~~~~
   kernel//trace/trace.c:4627:21: note: each undeclared identifier is reported 
only once for each function it appears in
   cc1: some warnings being treated as errors

vim +/trace_find_tgid +4612 kernel//trace/trace.c

  4606          (*pos)++;
  4607  
  4608          for (; ptr < 
&savedcmd->map_cmdline_to_pid[savedcmd->cmdline_num];
  4609               ptr++) {
  4610                  if (*ptr == -1 || *ptr == NO_CMDLINE_MAP)
  4611                          continue;
> 4612                  if (tgid_check && !trace_find_tgid(*ptr))
  4613                          continue;
  4614  
  4615                  return ptr;
  4616          }
  4617  
  4618          return NULL;
  4619  }
  4620  
  4621  static void *saved_cmdlines_start(struct seq_file *m, loff_t *pos)
  4622  {
  4623          void *v;
  4624          loff_t l = 0;
  4625          long tgid_check = (long) m->private;
  4626  
> 4627          if (tgid_check && !tgid_map)
  4628                  return NULL;
  4629  
  4630          preempt_disable();

---
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