[vfs:work.pages 72/72] arch/powerpc/platforms/pseries/cmm.c:481:10: warning: comparison of distinct pointer types lacks a cast

[vfs:work.pages 72/72] arch/powerpc/platforms/pseries/cmm.c:481:10: warning: comparison of distinct pointer types lacks a cast

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.pages
head:   f56372690a0a677a4dc30c36fc70c53657380bb9
commit: f56372690a0a677a4dc30c36fc70c53657380bb9 [72/72] [powerpc] switch cmm_page_array->pages[] to pointers
config: powerpc-allyesconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout f56372690a0a677a4dc30c36fc70c53657380bb9
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc 

All warnings (new ones prefixed by >>):

   arch/powerpc/platforms/pseries/cmm.c:481:24: sparse: incompatible types in comparison expression (different base types)
   arch/powerpc/platforms/pseries/cmm.c:566:30: sparse: incompatible types in comparison expression (different base types)
   arch/powerpc/platforms/pseries/cmm.c: In function 'cmm_count_pages':
>> arch/powerpc/platforms/pseries/cmm.c:481:10: warning: comparison of distinct pointer types lacks a cast
      if (pa >= start && pa < end)
             ^
   arch/powerpc/platforms/pseries/cmm.c:481:25: warning: comparison of distinct pointer types lacks a cast
      if (pa >= start && pa < end)
                            ^
   arch/powerpc/platforms/pseries/cmm.c: In function 'cmm_mem_going_offline':
   arch/powerpc/platforms/pseries/cmm.c:566:16: warning: comparison of distinct pointer types lacks a cast
      if ((pa_curr >= start_page) && (pa_curr < end_page)) {
                   ^
   arch/powerpc/platforms/pseries/cmm.c:566:43: warning: comparison of distinct pointer types lacks a cast
      if ((pa_curr >= start_page) && (pa_curr < end_page)) {
                                              ^

vim +481 arch/powerpc/platforms/pseries/cmm.c

   465	 * @arg: memory_isolate_notify structure with address range and count
   466	 *
   467	 * Return value:
   468	 *      0 on success
   469	 **/
   470	static unsigned long cmm_count_pages(void *arg)
   471	{
   472		struct memory_isolate_notify *marg = arg;
   473		struct cmm_page_array *pa;
   474		void *start = pfn_to_kaddr(marg->start_pfn);
   475		void *end = start + (marg->nr_pages << PAGE_SHIFT);
   476		unsigned long idx;
   477	
   478		spin_lock(&cmm_lock);
   479		pa = cmm_page_list;
   480		while (pa) {
 > 481			if (pa >= start && pa < end)
   482				marg->pages_found++;
   483			for (idx = 0; idx < pa->index; idx++)
   484				if (pa->page[idx] >= start && pa->page[idx] < end)
   485					marg->pages_found++;
   486			pa = pa->next;
   487		}
   488		spin_unlock(&cmm_lock);
   489		return 0;

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

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