Hi Gavin,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[cannot apply to hnaz-linux-mm/master linux/master v5.13 next-20210707]
[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/Gavin-Shan/mm-debug_vm_pgtable-Fix-corrupted-PG_arch_1-by-set_pmd_at/20210702-183310
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3dbdb38e286903ec220aaf1fb29a8d94297da246
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/414db1c0feb54b545b3df56bc19ffff27580deb5
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Gavin-Shan/mm-debug_vm_pgtable-Fix-corrupted-PG_arch_1-by-set_pmd_at/20210702-183310
        git checkout 414db1c0feb54b545b3df56bc19ffff27580deb5
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

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

All errors (new ones prefixed by >>):

   In file included from arch/x86/include/asm/page.h:76,
                    from arch/x86/include/asm/thread_info.h:12,
                    from include/linux/thread_info.h:59,
                    from arch/x86/include/asm/preempt.h:7,
                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:51,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:6,
                    from mm/debug_vm_pgtable.c:13:
   mm/debug_vm_pgtable.c: In function 'pud_advanced_tests':
>> include/asm-generic/memory_model.h:25:37: error: invalid operands to binary + (have 'struct page *' and 'struct page *')
      25 | #define __pfn_to_page(pfn) (vmemmap + (pfn))
         |                                     ^
   include/asm-generic/memory_model.h:53:21: note: in expansion of macro '__pfn_to_page'
      53 | #define pfn_to_page __pfn_to_page
         |                     ^~~~~~~~~~~~~
   mm/debug_vm_pgtable.c:347:22: note: in expansion of macro 'pfn_to_page'
     347 |  struct page *page = pfn_to_page(page);
         |                      ^~~~~~~~~~~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for PHY_SPARX5_SERDES
   Depends on (ARCH_SPARX5 || COMPILE_TEST && OF && HAS_IOMEM
   Selected by
   - SPARX5_SWITCH && NETDEVICES && ETHERNET && NET_VENDOR_MICROCHIP && NET_SWITCHDEV && HAS_IOMEM


vim +25 include/asm-generic/memory_model.h

8f6aac419bd590 Christoph Lameter  2007-10-16  23  
af901ca181d92a André Goddard Rosa 2009-11-14  24  /* memmap is virtually contiguous.  */
8f6aac419bd590 Christoph Lameter  2007-10-16 @25  #define __pfn_to_page(pfn)	(vmemmap + (pfn))
32272a26974d20 Martin Schwidefsky 2008-12-25  26  #define __page_to_pfn(page)	(unsigned long)((page) - vmemmap)
8f6aac419bd590 Christoph Lameter  2007-10-16  27  

---
0-DAY CI Kernel Test Service, Intel Corporation
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