On Thu, 2025-03-20 at 19:42 +0800, kernel test robot wrote: > Hi Rik, > > 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/Rik-van-Riel/mm-vmscan-batch-TLB-flush-during-memory-reclaim/20250320-013150 > base: > https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm- > everything > patch link: > https://lore.kernel.org/r/20250319132818.1003878b%40fangorn > patch subject: [PATCH] mm/vmscan: batch TLB flush during memory > reclaim > config: sh-randconfig-001-20250320 > (https://download.01.org/0day-ci/archive/20250320/202503201810.9JxSMo > 0Q-lkp@xxxxxxxxx/config) > compiler: sh4-linux-gcc (GCC) 14.2.0 > reproduce (this is a W=1 build): > (https://download.01.org/0day-ci/archive/20250320/202503201810.9JxSMo > 0Q-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/202503201810.9JxSMo0Q-lkp@xxxxxxxxx/ > > All errors (new ones prefixed by >>): > > mm/vmscan.c: In function 'shrink_folio_list': > > > mm/vmscan.c:1560:53: error: implicit declaration of function > > > 'folio_test_young'; did you mean 'folio_set_count'? [-Wimplicit- > > > function-declaration] > 1560 | (folio_mapped(folio) && > folio_test_young(folio))) > | > ^~~~~~~~~~~~~~~~ > | > folio_set_count This is a fun one, because there appear to be several instances of folio_test_young sprinkled through mm/*.c in the current mm tree. I guess some combination of config options and a previous change to the tree broke this? It looks like this failing compile is on sh, without CONFIG_64BIT, but with CONFIG_PAGE_IDLE_FLAG set. In that case, page_idle.h has an inline folio_test_young(). Does vmscan.c simply need to #include <linux/page_idle.h> or should the code be using folio_test_clear_referenced() instead of folio_test_young() ? -- All Rights Reversed.
