Re: [RFC PATCH 10/12] mm/hugetlb: do explicit CMA balancing

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

Hi Frank,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on powerpc/next]
[also build test ERROR on powerpc/fixes powerpc/topic/ppc-kvm s390/features trace/for-next linus/master v6.17-rc7 next-20250926]
[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/Frank-van-der-Linden/mm-cma-add-tunable-for-CMA-fallback-limit/20250926-101411
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
patch link:    https://lore.kernel.org/r/20250915195153.462039-11-fvdl%40google.com
patch subject: [RFC PATCH 10/12] mm/hugetlb: do explicit CMA balancing
config: x86_64-buildonly-randconfig-001-20250926 (https://download.01.org/0day-ci/archive/20250927/202509270126.MXOaMSXO-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250927/202509270126.MXOaMSXO-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/202509270126.MXOaMSXO-lkp@intel.com/

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: balance_node_cma
   >>> referenced by usercopy_64.c
   >>>               vmlinux.o:(hugetlb_cma_balance)

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki