Hi Kanchana, kernel test robot noticed the following build errors: [auto build test ERROR on 7c626ce4bae1ac14f60076d00eafe71af30450ba] url: https://github.com/intel-lab-lkp/linux/commits/Kanchana-P-Sridhar/mm-zswap-zswap_is_folio_same_filled-takes-an-index-in-the-folio/20240817-131053 base: 7c626ce4bae1ac14f60076d00eafe71af30450ba patch link: https://lore.kernel.org/r/20240817050921.18462-5-kanchana.p.sridhar%40intel.com patch subject: [PATCH v3 4/4] mm: swap: Count successful mTHP ZSWAP stores in sysfs mTHP stats. config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20240818/202408180729.M6uZh634-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-12) 11.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240818/202408180729.M6uZh634-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/202408180729.M6uZh634-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): mm/page_io.c: In function 'count_mthp_zswpout_vm_event': >> mm/page_io.c:178:17: error: implicit declaration of function 'count_mthp_stat' [-Werror=implicit-function-declaration] 178 | count_mthp_stat(folio_order(folio), MTHP_STAT_ZSWPOUT); | ^~~~~~~~~~~~~~~ >> mm/page_io.c:178:53: error: 'MTHP_STAT_ZSWPOUT' undeclared (first use in this function) 178 | count_mthp_stat(folio_order(folio), MTHP_STAT_ZSWPOUT); | ^~~~~~~~~~~~~~~~~ mm/page_io.c:178:53: note: each undeclared identifier is reported only once for each function it appears in cc1: some warnings being treated as errors vim +/count_mthp_stat +178 mm/page_io.c 174 175 static inline void count_mthp_zswpout_vm_event(struct folio *folio) 176 { 177 if (IS_ENABLED(CONFIG_THP_SWAP)) > 178 count_mthp_stat(folio_order(folio), MTHP_STAT_ZSWPOUT); 179 } 180 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
