Re: [PATCH v4 1/3] mm: use targeted IPIs for TLB sync with lockless page table walkers

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

Hi Lance,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on tip/x86/core arnd-asm-generic/master linus/master v6.19-rc8]
[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/Lance-Yang/mm-use-targeted-IPIs-for-TLB-sync-with-lockless-page-table-walkers/20260202-154938
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20260202074557.16544-2-lance.yang%40linux.dev
patch subject: [PATCH v4 1/3] mm: use targeted IPIs for TLB sync with lockless page table walkers
config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20260204/202602040751.TGypHk92-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260204/202602040751.TGypHk92-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/202602040751.TGypHk92-lkp@intel.com/

All errors (new ones prefixed by >>):

   arm-linux-gnueabi-ld: kernel/events/core.o: in function `pt_walk_lockless_end':
>> core.c:(.text.pt_walk_lockless_end+0x368): undefined reference to `active_lockless_pt_walk_mm'
   arm-linux-gnueabi-ld: kernel/events/core.o: in function `pt_walk_lockless_start':
>> core.c:(.text.pt_walk_lockless_start+0x370): undefined reference to `active_lockless_pt_walk_mm'

-- 
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