Hi Zi,

[auto build test WARNING on linus/master]
[also build test WARNING on v4.10-rc8 next-20170216]
[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/Anshuman-Khandual/Enable-parallel-page-migration/20170217-200523
config: i386-tinyconfig (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 warnings (new ones prefixed by >>):

   mm/copy_pages_mthread.c: In function 'copy_pages_mthread':
>> mm/copy_pages_mthread.c:49:10: warning: assignment discards 'const' 
>> qualifier from pointer target type [-Wdiscarded-qualifiers]
     cpumask = cpumask_of_node(node);
             ^

vim +/const +49 mm/copy_pages_mthread.c

    33  static void copythread(struct work_struct *work)
    34  {
    35          struct copy_info *info = (struct copy_info *) work;
    36  
    37          copy_pages(info->to, info->from, info->chunk_size);
    38  }
    39  
    40  int copy_pages_mthread(struct page *to, struct page *from, int nr_pages)
    41  {
    42          struct cpumask *cpumask;
    43          struct copy_info *work_items;
    44          char *vto, *vfrom;
    45          unsigned long i, cthreads, cpu, node, chunk_size;
    46          int cpu_id_list[32] = {0};
    47  
    48          node = page_to_nid(to);
  > 49          cpumask = cpumask_of_node(node);
    50          cthreads = nr_copythreads;
    51          cthreads = min_t(unsigned int, cthreads, 
cpumask_weight(cpumask));
    52          cthreads = (cthreads / 2) * 2;
    53          work_items = kcalloc(cthreads, sizeof(struct copy_info), 
GFP_KERNEL);
    54          if (!work_items)
    55                  return -ENOMEM;
    56  
    57          i = 0;

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

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