From: kernel test robot <lkp@intel.com>
To: Qi Zheng <qi.zheng@linux.dev>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev
Subject: Re: [PATCH v3 24/30] mm: memcontrol: prepare for reparenting LRU pages for lruvec lock
Date: Fri, 16 Jan 2026 14:29:32 +0800 [thread overview]
Message-ID: <202601161444.lDjWS5Wf-lkp@intel.com> (raw)
In-Reply-To: <0252f9acc29d4b1e9b8252dc003aff065c8ac1f6.1768389889.git.zhengqi.arch@bytedance.com>
Hi Qi,
kernel test robot noticed the following build warnings:
[auto build test WARNING on next-20260115]
[cannot apply to akpm-mm/mm-everything brauner-vfs/vfs.all trace/for-next linus/master dennis-percpu/for-next v6.19-rc5 v6.19-rc4 v6.19-rc3 v6.19-rc5]
[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/Qi-Zheng/mm-memcontrol-remove-dead-code-of-checking-parent-memory-cgroup/20260115-224607
base: next-20260115
patch link: https://lore.kernel.org/r/0252f9acc29d4b1e9b8252dc003aff065c8ac1f6.1768389889.git.zhengqi.arch%40bytedance.com
patch subject: [PATCH v3 24/30] mm: memcontrol: prepare for reparenting LRU pages for lruvec lock
config: sparc64-allmodconfig (https://download.01.org/0day-ci/archive/20260116/202601161444.lDjWS5Wf-lkp@intel.com/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/20260116/202601161444.lDjWS5Wf-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601161444.lDjWS5Wf-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from kernel/sched/core.c:16:
In file included from include/linux/syscalls_api.h:1:
In file included from include/linux/syscalls.h:95:
In file included from include/trace/syscall.h:7:
In file included from include/linux/trace_events.h:10:
In file included from include/linux/perf_event.h:53:
In file included from include/linux/security.h:35:
In file included from include/linux/bpf.h:32:
include/linux/memcontrol.h:772:14: error: use of undeclared identifier 'lruvec'
772 | __acquires(&lruvec->lru_lock)
| ^~~~~~
include/linux/memcontrol.h:773:13: error: use of undeclared identifier 'rcu'
773 | __acquires(rcu)
| ^~~
include/linux/memcontrol.h:775:14: error: use of undeclared identifier 'lruvec'
775 | __acquires(&lruvec->lru_lock)
| ^~~~~~
include/linux/memcontrol.h:776:13: error: use of undeclared identifier 'rcu'
776 | __acquires(rcu)
| ^~~
include/linux/memcontrol.h:779:14: error: use of undeclared identifier 'lruvec'
779 | __acquires(&lruvec->lru_lock)
| ^~~~~~
include/linux/memcontrol.h:780:13: error: use of undeclared identifier 'rcu'
780 | __acquires(rcu)
| ^~~
include/linux/memcontrol.h:1507:13: error: use of undeclared identifier 'rcu'
1507 | __acquires(rcu)
| ^~~
include/linux/memcontrol.h:1515:13: error: use of undeclared identifier 'rcu'
1515 | __releases(rcu)
| ^~~
include/linux/memcontrol.h:1523:13: error: use of undeclared identifier 'rcu'
1523 | __releases(rcu)
| ^~~
include/linux/memcontrol.h:1532:13: error: use of undeclared identifier 'rcu'
1532 | __releases(rcu)
| ^~~
In file included from kernel/sched/core.c:83:
In file included from arch/sparc/include/asm/tlb.h:5:
In file included from arch/sparc/include/asm/tlb_64.h:5:
include/linux/swap.h:333:14: error: use of undeclared identifier 'rcu'
333 | __releases(rcu)
| ^~~
>> kernel/sched/core.c:7772:12: warning: array index -1 is before the beginning of the array [-Warray-bounds]
7772 | preempt_modes[preempt_dynamic_mode] : "undef",
| ^ ~~~~~~~~~~~~~~~~~~~~
kernel/sched/core.c:7747:1: note: array 'preempt_modes' declared here
7747 | const char *preempt_modes[] = {
| ^
1 warning and 11 errors generated.
vim +7772 kernel/sched/core.c
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7750
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7751 const char *preempt_model_str(void)
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7752 {
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7753 bool brace = IS_ENABLED(CONFIG_PREEMPT_RT) &&
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7754 (IS_ENABLED(CONFIG_PREEMPT_DYNAMIC) ||
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7755 IS_ENABLED(CONFIG_PREEMPT_LAZY));
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7756 static char buf[128];
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7757
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7758 if (IS_ENABLED(CONFIG_PREEMPT_BUILD)) {
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7759 struct seq_buf s;
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7760
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7761 seq_buf_init(&s, buf, sizeof(buf));
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7762 seq_buf_puts(&s, "PREEMPT");
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7763
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7764 if (IS_ENABLED(CONFIG_PREEMPT_RT))
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7765 seq_buf_printf(&s, "%sRT%s",
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7766 brace ? "_{" : "_",
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7767 brace ? "," : "");
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7768
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7769 if (IS_ENABLED(CONFIG_PREEMPT_DYNAMIC)) {
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7770 seq_buf_printf(&s, "(%s)%s",
3ebb1b6522392f6 Thomas Weißschuh 2025-06-26 7771 preempt_dynamic_mode >= 0 ?
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 @7772 preempt_modes[preempt_dynamic_mode] : "undef",
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7773 brace ? "}" : "");
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7774 return seq_buf_str(&s);
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7775 }
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7776
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7777 if (IS_ENABLED(CONFIG_PREEMPT_LAZY)) {
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7778 seq_buf_printf(&s, "LAZY%s",
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7779 brace ? "}" : "");
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7780 return seq_buf_str(&s);
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7781 }
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7782
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7783 return seq_buf_str(&s);
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7784 }
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7785
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7786 if (IS_ENABLED(CONFIG_PREEMPT_VOLUNTARY_BUILD))
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7787 return "VOLUNTARY";
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7788
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7789 return "NONE";
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7790 }
8bdc5daaa01e305 Sebastian Andrzej Siewior 2025-03-14 7791
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
prev parent reply other threads:[~2026-01-16 6:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <0252f9acc29d4b1e9b8252dc003aff065c8ac1f6.1768389889.git.zhengqi.arch@bytedance.com>
2026-01-15 12:34 ` [PATCH v3 24/30] mm: memcontrol: prepare for reparenting LRU pages for lruvec lock kernel test robot
2026-01-16 8:16 ` Qi Zheng
2026-01-16 10:41 ` Philip Li
2026-01-16 11:06 ` Qi Zheng
2026-01-16 6:29 ` kernel test robot [this message]
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