Hi Mathieu, kernel test robot noticed the following build warnings:
[auto build test WARNING on next-20260109] [cannot apply to akpm-mm/mm-everything kees/for-next/execve tip/sched/core linus/master v6.19-rc4 v6.19-rc3 v6.19-rc2 v6.19-rc4] [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/Mathieu-Desnoyers/lib-Introduce-hierarchical-per-cpu-counters/20260111-231206 base: next-20260109 patch link: https://lore.kernel.org/r/20260111150249.1222944-4-mathieu.desnoyers%40efficios.com patch subject: [PATCH v12 3/3] mm: Implement precise OOM killer task selection config: arm-randconfig-001-20260112 (https://download.01.org/0day-ci/archive/20260112/[email protected]/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260112/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All warnings (new ones prefixed by >>): >> kernel/fork.c:637:6: warning: format specifies type 'long' but the argument >> has type 'int' [-Wformat] 635 | pr_alert("BUG: Bad rss-counter state mm:%p type:%s val:%ld Comm:%s Pid:%d\n", | ~~~ | %d 636 | mm, resident_page_types[i], 637 | percpu_counter_tree_precise_sum(&mm->rss_stat[i]), | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/printk.h:534:35: note: expanded from macro 'pr_alert' 534 | printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) | ~~~ ^~~~~~~~~~~ include/linux/printk.h:511:60: note: expanded from macro 'printk' 511 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__) | ~~~ ^~~~~~~~~~~ include/linux/printk.h:483:19: note: expanded from macro 'printk_index_wrap' 483 | _p_func(_fmt, ##__VA_ARGS__); \ | ~~~~ ^~~~~~~~~~~ 1 warning generated. -- >> mm/oom_kill.c:351:6: warning: variable 'points_min' is used uninitialized >> whenever 'if' condition is true [-Wsometimes-uninitialized] 351 | if (oom_task_origin(task)) { | ^~~~~~~~~~~~~~~~~~~~~ mm/oom_kill.c:392:22: note: uninitialized use occurs here 392 | oc->chosen_points = points_min; | ^~~~~~~~~~ mm/oom_kill.c:351:2: note: remove the 'if' if its condition is always false 351 | if (oom_task_origin(task)) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ 352 | points = LONG_MAX; | ~~~~~~~~~~~~~~~~~~ 353 | goto select; | ~~~~~~~~~~~~ 354 | } | ~ mm/oom_kill.c:326:25: note: initialize the variable 'points_min' to silence this warning 326 | long points, points_min, points_max; | ^ | = 0 1 warning generated. vim +637 kernel/fork.c 6af8cb80d3a9a6 David Hildenbrand 2025-03-03 625 d70f2a14b72a4b Andrew Morton 2018-01-31 626 static void check_mm(struct mm_struct *mm) d70f2a14b72a4b Andrew Morton 2018-01-31 627 { d70f2a14b72a4b Andrew Morton 2018-01-31 628 int i; d70f2a14b72a4b Andrew Morton 2018-01-31 629 8495f7e6732ed2 Sai Praneeth Prakhya 2019-09-25 630 BUILD_BUG_ON_MSG(ARRAY_SIZE(resident_page_types) != NR_MM_COUNTERS, 8495f7e6732ed2 Sai Praneeth Prakhya 2019-09-25 631 "Please make sure 'struct resident_page_types[]' is updated as well"); 8495f7e6732ed2 Sai Praneeth Prakhya 2019-09-25 632 d70f2a14b72a4b Andrew Morton 2018-01-31 633 for (i = 0; i < NR_MM_COUNTERS; i++) { 25d942f31cc499 Mathieu Desnoyers 2026-01-11 634 if (unlikely(percpu_counter_tree_precise_compare_value(&mm->rss_stat[i], 0) != 0)) 72456781289a6e Mathieu Desnoyers 2026-01-11 635 pr_alert("BUG: Bad rss-counter state mm:%p type:%s val:%ld Comm:%s Pid:%d\n", 25d942f31cc499 Mathieu Desnoyers 2026-01-11 636 mm, resident_page_types[i], 25d942f31cc499 Mathieu Desnoyers 2026-01-11 @637 percpu_counter_tree_precise_sum(&mm->rss_stat[i]), 881388f3433819 Xuanye Liu 2025-07-23 638 current->comm, 881388f3433819 Xuanye Liu 2025-07-23 639 task_pid_nr(current)); 881388f3433819 Xuanye Liu 2025-07-23 640 } d70f2a14b72a4b Andrew Morton 2018-01-31 641 d70f2a14b72a4b Andrew Morton 2018-01-31 642 if (mm_pgtables_bytes(mm)) d70f2a14b72a4b Andrew Morton 2018-01-31 643 pr_alert("BUG: non-zero pgtables_bytes on freeing mm: %ld\n", d70f2a14b72a4b Andrew Morton 2018-01-31 644 mm_pgtables_bytes(mm)); d70f2a14b72a4b Andrew Morton 2018-01-31 645 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
