Hi Aneesh, kernel test robot noticed the following build warnings: [auto build test WARNING on arm64/for-next/core] [also build test WARNING on linus/master tip/x86/core v6.4-rc7 next-20230620] [cannot apply to akpm-mm/mm-everything] [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/Aneesh-Kumar-K-V/mm-lru_gen-lru_gen_look_around-simplification/20230613-200408 base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core patch link: https://lore.kernel.org/r/20230613120047.149573-3-aneesh.kumar%40linux.ibm.com patch subject: [PATCH 3/3] mm/lru_gen: Don't build multi-gen LRU page table walk code on architecture not supported config: alpha-allmodconfig (https://download.01.org/0day-ci/archive/20230621/202306211018.fodsNZaR-lkp@xxxxxxxxx/config) compiler: alpha-linux-gcc (GCC) 12.3.0 reproduce: (https://download.01.org/0day-ci/archive/20230621/202306211018.fodsNZaR-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/202306211018.fodsNZaR-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> mm/vmscan.c:4564:6: warning: no previous prototype for '__try_to_inc_max_seq' [-Wmissing-prototypes] 4564 | bool __try_to_inc_max_seq(struct lruvec *lruvec, unsigned long max_seq, | ^~~~~~~~~~~~~~~~~~~~ vim +/__try_to_inc_max_seq +4564 mm/vmscan.c 4559 4560 /* 4561 * inc_max_seq can drop the lru_lock in between. So use a waitqueue seq_update_progress 4562 * to allow concurrent access. 4563 */ > 4564 bool __try_to_inc_max_seq(struct lruvec *lruvec, unsigned long max_seq, 4565 bool can_swap, bool force_scan) 4566 { 4567 bool success = false; 4568 struct lru_gen_folio *lrugen = &lruvec->lrugen; 4569 4570 VM_WARN_ON_ONCE(max_seq > READ_ONCE(lrugen->max_seq)); 4571 4572 /* see the comment in iterate_mm_list() */ 4573 if (lruvec->seq_update_progress) 4574 success = false; 4575 else { 4576 spin_lock_irq(&lruvec->lru_lock); 4577 4578 if (max_seq != lrugen->max_seq) 4579 goto done; 4580 4581 if (lruvec->seq_update_progress) 4582 goto done; 4583 4584 success = true; 4585 lruvec->seq_update_progress = true; 4586 done: 4587 spin_unlock_irq(&lruvec->lru_lock); 4588 } 4589 4590 if (success) 4591 inc_max_seq(lruvec, can_swap, force_scan); 4592 4593 return success; 4594 } 4595 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
