Re: [PATCH 2/2] mm: memblock: show all region flags in debugfs

Hi Meijing,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]

url:    https://github.com/intel-lab-lkp/linux/commits/Meijing-Zhao/mm-memblock-add-missing-HugeTLB-flag-name/20260819-155421
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20260819075422.2387980-3-zhaomeijing100%40gmail.com
patch subject: [PATCH 2/2] mm: memblock: show all region flags in debugfs
config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20260823/[email protected]/config)
compiler: powerpc64-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260823/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All errors (new ones prefixed by >>):

   In file included from include/linux/kernel.h:25,
                    from mm/memblock.c:9:
>> mm/memblock.c:2805:16: error: 'MEMBLOCK_RSRV_HUGETLB' undeclared here (not in a function); did you mean 'MEMBLOCK_RSRV_KERN'?
    2805 |         [ilog2(MEMBLOCK_RSRV_HUGETLB)] = "RSV_HUGETLB",
         |                ^~~~~~~~~~~~~~~~~~~~~
   include/linux/log2.h:158:30: note: in definition of macro 'ilog2'
     158 |         __builtin_constant_p(n) ?       \
         |                              ^
>> include/linux/log2.h:157:1: error: array index in initializer not of integer type
     157 | ( \
         | ^
   mm/memblock.c:2805:10: note: in expansion of macro 'ilog2'
    2805 |         [ilog2(MEMBLOCK_RSRV_HUGETLB)] = "RSV_HUGETLB",
         |          ^~~~~
   include/linux/log2.h:157:1: note: (near initialization for 'flagname')
   mm/memblock.c:2805:10: note: in expansion of macro 'ilog2'
    2805 |         [ilog2(MEMBLOCK_RSRV_HUGETLB)] = "RSV_HUGETLB",
         |          ^~~~~


vim +2805 mm/memblock.c

  2794	
  2795	#ifdef CONFIG_DEBUG_FS
  2796	#ifdef CONFIG_ARCH_KEEP_MEMBLOCK
  2797	static const char * const flagname[] = {
  2798		[ilog2(MEMBLOCK_HOTPLUG)] = "HOTPLUG",
  2799		[ilog2(MEMBLOCK_MIRROR)] = "MIRROR",
  2800		[ilog2(MEMBLOCK_NOMAP)] = "NOMAP",
  2801		[ilog2(MEMBLOCK_DRIVER_MANAGED)] = "DRV_MNG",
  2802		[ilog2(MEMBLOCK_RSRV_NOINIT)] = "RSV_NIT",
  2803		[ilog2(MEMBLOCK_RSRV_KERN)] = "RSV_KERN",
  2804		[ilog2(MEMBLOCK_KHO_SCRATCH)] = "KHO_SCRATCH",
> 2805		[ilog2(MEMBLOCK_RSRV_HUGETLB)] = "RSV_HUGETLB",
  2806	};
  2807	

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