Re: [PATCH v4] mm: Add CONFIG_PAGE_BLOCK_ORDER to select page block order

[kernel test robot <lkp@intel.com>]

Hi Juan,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.15-rc5]
[cannot apply to akpm-mm/mm-everything next-20250509]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Juan-Yescas/mm-Add-CONFIG_PAGE_BLOCK_ORDER-to-select-page-block-order/20250510-090501
base:   linus/master
patch link:    https://lore.kernel.org/r/20250510010338.3978696-1-jyescas%40google.com
patch subject: [PATCH v4] mm: Add CONFIG_PAGE_BLOCK_ORDER to select page block order
config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20250511/202505110035.wtOWnL8o-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250511/202505110035.wtOWnL8o-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505110035.wtOWnL8o-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/gfp.h:7,
                    from include/linux/xarray.h:16,
                    from include/linux/list_lru.h:14,
                    from include/linux/fs.h:14,
                    from include/linux/compat.h:17,
                    from arch/powerpc/kernel/asm-offsets.c:12:
>> include/linux/mmzone.h:53:2: error: #error MAX_PAGE_ORDER must be >= PAGE_BLOCK_ORDER
      53 | #error MAX_PAGE_ORDER must be >= PAGE_BLOCK_ORDER
         |  ^~~~~
   make[3]: *** [scripts/Makefile.build:98: arch/powerpc/kernel/asm-offsets.s] Error 1
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1275: prepare0] Error 2
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:248: __sub-make] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +53 include/linux/mmzone.h

    46	
    47	/*
    48	 * The MAX_PAGE_ORDER, which defines the max order of pages to be allocated
    49	 * by the buddy allocator, has to be larger or equal to the PAGE_BLOCK_ORDER,
    50	 * which defines the order for the number of pages that can have a migrate type
    51	 */
    52	#if (PAGE_BLOCK_ORDER > MAX_PAGE_ORDER)
  > 53	#error MAX_PAGE_ORDER must be >= PAGE_BLOCK_ORDER
    54	#endif
    55	

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