[dax:xarray-pagecache 23/23] mm/readahead.c:402:0: warning: "PMD_ORDER" redefined

[dax:xarray-pagecache 23/23] mm/readahead.c:402:0: warning: "PMD_ORDER" redefined

[kbuild test robot]

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tree:   git://git.infradead.org/users/willy/linux-dax.git xarray-pagecache
head:   6b6e0c484a648c43a5cf13b56b7fd953917857bf
commit: 6b6e0c484a648c43a5cf13b56b7fd953917857bf [23/23] stash
config: mips-randconfig-a001-20200112 (attached as .config)
compiler: mips64-linux-gcc (GCC) 7.5.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 6b6e0c484a648c43a5cf13b56b7fd953917857bf
        # save the attached .config to linux build tree
        GCC_VERSION=7.5.0 make.cross ARCH=mips 

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

All warnings (new ones prefixed by >>):

>> mm/readahead.c:402:0: warning: "PMD_ORDER" redefined
    #define PMD_ORDER (PMD_SHIFT - PAGE_SHIFT)
    
   In file included from arch/mips/include/asm/pgtable.h:17:0,
                    from include/linux/mm.h:99,
                    from include/linux/dax.h:6,
                    from mm/readahead.c:12:
   arch/mips/include/asm/pgtable-64.h:94:0: note: this is the location of the previous definition
    #define PMD_ORDER  0
    

vim +/PMD_ORDER +402 mm/readahead.c

   401	
 > 402	#define PMD_ORDER	(PMD_SHIFT - PAGE_SHIFT)
   403	

---
0-DAY kernel test infrastructure                 Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org Intel Corporation

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