Hi Byungchul, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] [also build test ERROR on tip/sched/core tip/x86/core arm64/for-next/core tip/x86/mm linus/master v6.7 next-20240111] [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/Byungchul-Park/x86-tlb-Add-APIs-manipulating-tlb-batch-s-arch-data/20240111-141049 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20240111060757.13563-7-byungchul%40sk.com patch subject: [v5 6/7] mm: Defer TLB flush by keeping both src and dst folios at migration config: i386-allnoconfig (https://download.01.org/0day-ci/archive/20240112/202401120213.rCOV7YQI-lkp@xxxxxxxxx/config) compiler: ClangBuiltLinux clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240112/202401120213.rCOV7YQI-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202401120213.rCOV7YQI-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> ld.lld: error: undefined symbol: migrc_flush_start >>> referenced by tlb.c >>> arch/x86/mm/tlb.o:(arch_tlbbatch_flush) in archive vmlinux.a -- >> ld.lld: error: undefined symbol: migrc_flush_end >>> referenced by tlb.c >>> arch/x86/mm/tlb.o:(arch_tlbbatch_flush) in archive vmlinux.a -- >> ld.lld: error: undefined symbol: migrc_flush_free_folios >>> referenced by memory.c >>> mm/memory.o:(handle_mm_fault) in archive vmlinux.a >>> referenced by page_alloc.c >>> mm/page_alloc.o:(get_page_from_freelist) in archive vmlinux.a -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
