Re: [PATCH v3 4/4] mm: swap: Count successful mTHP ZSWAP stores in sysfs mTHP stats.

From: kernel test robot
Date: Sat Aug 17 2024 - 20:04:07 EST


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

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