Re: [PATCH 2/2] mm/memory-failure: improve large block size folio handling.

[Zi Yan <ziy@nvidia.com>]

On 11 Oct 2025, at 6:23, kernel test robot wrote:

> Hi Zi,
>
> kernel test robot noticed the following build errors:
>
> [auto build test ERROR on linus/master]
> [also build test ERROR on v6.17 next-20251010]
> [cannot apply to akpm-mm/mm-everything]
> [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/Zi-Yan/mm-huge_memory-do-not-change-split_huge_page-target-order-silently/20251011-014145
> base:   linus/master
> patch link:    https://lore.kernel.org/r/20251010173906.3128789-3-ziy%40nvidia.com
> patch subject: [PATCH 2/2] mm/memory-failure: improve large block size folio handling.
> config: parisc-allmodconfig (https://download.01.org/0day-ci/archive/20251011/202510111805.rg0AewVk-lkp@intel.com/config)
> compiler: hppa-linux-gcc (GCC) 15.1.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251011/202510111805.rg0AewVk-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/202510111805.rg0AewVk-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
>    mm/memory-failure.c: In function 'memory_failure':
>>> mm/memory-failure.c:2278:33: error: implicit declaration of function 'min_order_for_split' [-Wimplicit-function-declaration]
>     2278 |                 int new_order = min_order_for_split(folio);
>          |                                 ^~~~~~~~~~~~~~~~~~~
>

min_order_for_split() is missing in the !CONFIG_TRANSPARENT_HUGEPAGE case. Will add one
to get rid of this error.

Thanks.


--
Best Regards,
Yan, Zi