tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 
WIP.core/stacktrace
head:   63c35ea6b829a0f98d307a8dec038095681ecd13
commit: 6476291d5b823a05b9c903a65a5f6e6026a02606 [34/47] drm: Simplify 
stacktrace handling
config: i386-randconfig-x019-201915 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout 6476291d5b823a05b9c903a65a5f6e6026a02606
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   drivers/gpu/drm/drm_mm.c: In function 'show_leaks':
>> drivers/gpu/drm/drm_mm.c:136:3: error: implicit declaration of function 
>> 'stack_trace_snprintf'; did you mean 'stack_trace_snprint'? 
>> [-Werror=implicit-function-declaration]
      stack_trace_snprintf(buf, BUFSZ, entries, nr_entries, 0);
      ^~~~~~~~~~~~~~~~~~~~
      stack_trace_snprint
   cc1: some warnings being treated as errors

vim +136 drivers/gpu/drm/drm_mm.c

   116  
   117  static void show_leaks(struct drm_mm *mm)
   118  {
   119          struct drm_mm_node *node;
   120          unsigned long *entries;
   121          unsigned int nr_entries;
   122          char *buf;
   123  
   124          buf = kmalloc(BUFSZ, GFP_KERNEL);
   125          if (!buf)
   126                  return;
   127  
   128          list_for_each_entry(node, drm_mm_nodes(mm), node_list) {
   129                  if (!node->stack) {
   130                          DRM_ERROR("node [%08llx + %08llx]: unknown 
owner\n",
   131                                    node->start, node->size);
   132                          continue;
   133                  }
   134  
   135                  nr_entries = stack_depot_fetch(node->stack, &entries);
 > 136                  stack_trace_snprintf(buf, BUFSZ, entries, nr_entries, 
 > 0);
   137                  DRM_ERROR("node [%08llx + %08llx]: inserted at\n%s",
   138                            node->start, node->size, buf);
   139          }
   140  
   141          kfree(buf);
   142  }
   143  

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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