Hi Lorenzo, 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/Lorenzo-Stoakes/mm-ksm-have-KSM-VMA-checks-not-require-a-VMA-pointer/20250519-165315 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/418d3edbec3a718a7023f1beed5478f5952fc3df.1747431920.git.lorenzo.stoakes%40oracle.com patch subject: [PATCH 3/4] mm: prevent KSM from completely breaking VMA merging config: x86_64-buildonly-randconfig-001-20250519 (https://download.01.org/0day-ci/archive/20250519/202505192132.NsAm4haK-lkp@xxxxxxxxx/config) compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250519/202505192132.NsAm4haK-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/202505192132.NsAm4haK-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> mm/vma.c:2589:15: error: call to undeclared function 'ksm_vma_flags'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 2589 | map->flags = ksm_vma_flags(map->mm, map->file, map->flags); | ^ mm/vma.c:2761:10: error: call to undeclared function 'ksm_vma_flags'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 2761 | flags = ksm_vma_flags(mm, NULL, flags); | ^ 2 errors generated. vim +/ksm_vma_flags +2589 mm/vma.c 2586 2587 static void update_ksm_flags(struct mmap_state *map) 2588 { > 2589 map->flags = ksm_vma_flags(map->mm, map->file, map->flags); 2590 } 2591 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
