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orviesa003.jf.intel.com with ESMTP; 18 Jan 2026 01:17:14 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1vhOuF-00000000MqC-27Cy; Sun, 18 Jan 2026 09:17:11 +0000 Date: Sun, 18 Jan 2026 17:16:38 +0800 From: kernel test robot To: Peter Zijlstra Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, x86@kernel.org, Thomas Gleixner Subject: [tip:timers/vdso 16/16] include/linux/sched/mm.h:496:23: sparse: sparse: cast removes address space '__percpu' of expression Message-ID: <202601181733.YZOf9XU3-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/vdso head: adc00a0daf1bb08915bceee9ae73cca682e7d5bb commit: adc00a0daf1bb08915bceee9ae73cca682e7d5bb [16/16] compiler: Use __typeof_unqual__() for __unqual_scalar_typeof() config: i386-randconfig-063-20260118 (https://download.01.org/0day-ci/archive/20260118/202601181733.YZOf9XU3-lkp@intel.com/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260118/202601181733.YZOf9XU3-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202601181733.YZOf9XU3-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) mm/filemap.c: note: in included file (through arch/x86/include/asm/processor.h, arch/x86/include/asm/timex.h, include/linux/timex.h, ...): arch/x86/include/asm/current.h:23:24: sparse: sparse: cast removes address space '__percpu' of expression mm/filemap.c: note: in included file (through include/linux/xarray.h, include/linux/list_lru.h, include/linux/fs/super_types.h, ...): >> include/linux/sched/mm.h:496:23: sparse: sparse: cast removes address space '__percpu' of expression >> include/linux/sched/mm.h:496:23: sparse: sparse: cast removes address space '__percpu' of expression >> include/linux/sched/mm.h:496:23: sparse: sparse: cast removes address space '__percpu' of expression include/linux/sched/mm.h:497:17: sparse: sparse: cast removes address space '__percpu' of expression include/linux/sched/mm.h:497:17: sparse: sparse: cast removes address space '__percpu' of expression include/linux/sched/mm.h:497:17: sparse: sparse: cast removes address space '__percpu' of expression mm/filemap.c: note: in included file (through include/linux/preempt.h, include/linux/alloc_tag.h, include/linux/percpu.h, ...): arch/x86/include/asm/preempt.h:27:16: sparse: sparse: cast removes address space '__percpu' of expression mm/filemap.c: note: in included file (through include/linux/rbtree.h, include/linux/mm_types.h, include/linux/mmzone.h, ...): include/linux/rcupdate.h:897:25: sparse: sparse: context imbalance in 'filemap_fault_recheck_pte_none' - unexpected unlock include/linux/rcupdate.h:895:9: sparse: sparse: context imbalance in 'filemap_map_pages' - different lock contexts for basic block -- mm/memcontrol-v1.c:438:21: sparse: sparse: incompatible types in comparison expression (different address spaces): mm/memcontrol-v1.c:438:21: sparse: struct mem_cgroup_threshold_ary [noderef] __rcu * mm/memcontrol-v1.c:438:21: sparse: struct mem_cgroup_threshold_ary * mm/memcontrol-v1.c:440:21: sparse: sparse: incompatible types in comparison expression (different address spaces): mm/memcontrol-v1.c:440:21: sparse: struct mem_cgroup_threshold_ary [noderef] __rcu * mm/memcontrol-v1.c:440:21: sparse: struct mem_cgroup_threshold_ary * >> mm/memcontrol-v1.c:532:15: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol-v1.c:532:15: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol-v1.c:532:15: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c:533:16: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c:533:16: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c:533:16: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c:546:17: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c:546:17: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c:546:17: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c:643:9: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c:643:9: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c:643:9: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c:643:9: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c:643:9: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c:643:9: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c:802:9: sparse: sparse: incompatible types in comparison expression (different address spaces): mm/memcontrol-v1.c:802:9: sparse: struct mem_cgroup_threshold_ary [noderef] __rcu * mm/memcontrol-v1.c:802:9: sparse: struct mem_cgroup_threshold_ary * mm/memcontrol-v1.c:896:9: sparse: sparse: incompatible types in comparison expression (different address spaces): mm/memcontrol-v1.c:896:9: sparse: struct mem_cgroup_threshold_ary [noderef] __rcu * mm/memcontrol-v1.c:896:9: sparse: struct mem_cgroup_threshold_ary * mm/memcontrol-v1.c: note: in included file (through include/linux/preempt.h, include/linux/sched.h, include/linux/cgroup.h, ...): arch/x86/include/asm/preempt.h:27:16: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol-v1.c: note: in included file (through include/linux/sched.h, include/linux/cgroup.h, include/linux/memcontrol.h): arch/x86/include/asm/current.h:23:24: sparse: sparse: cast removes address space '__percpu' of expression -- >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression >> mm/memcontrol.c:592:33: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol.c:892:24: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol.c:892:24: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol.c:892:24: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol.c: note: in included file (through include/linux/preempt.h, include/linux/alloc_tag.h, include/linux/percpu.h, ...): arch/x86/include/asm/preempt.h:27:16: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol.c: note: in included file (through include/linux/sched.h, include/linux/percpu.h, include/linux/radix-tree.h, ...): arch/x86/include/asm/current.h:23:24: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol.c: note: in included file: include/linux/memcontrol.h:730:9: sparse: sparse: context imbalance in 'folio_lruvec_lock' - wrong count at exit include/linux/memcontrol.h:730:9: sparse: sparse: context imbalance in 'folio_lruvec_lock_irq' - wrong count at exit include/linux/memcontrol.h:730:9: sparse: sparse: context imbalance in 'folio_lruvec_lock_irqsave' - wrong count at exit mm/memcontrol.c:2722:17: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol.c:2722:17: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol.c:2722:17: sparse: sparse: cast removes address space '__percpu' of expression mm/memcontrol.c: note: in included file (through include/linux/xarray.h, include/linux/radix-tree.h, include/linux/idr.h, ...): >> include/linux/sched/mm.h:496:23: sparse: sparse: cast removes address space '__percpu' of expression >> include/linux/sched/mm.h:496:23: sparse: sparse: cast removes address space '__percpu' of expression >> include/linux/sched/mm.h:496:23: sparse: sparse: cast removes address space '__percpu' of expression include/linux/sched/mm.h:497:17: sparse: sparse: cast removes address space '__percpu' of expression include/linux/sched/mm.h:497:17: sparse: sparse: cast removes address space '__percpu' of expression include/linux/sched/mm.h:497:17: sparse: sparse: cast removes address space '__percpu' of expression -- fs/notify/inotify/inotify_fsnotify.c: note: in included file (through include/linux/xarray.h, include/linux/list_lru.h, include/linux/fs/super_types.h, ...): >> include/linux/sched/mm.h:496:23: sparse: sparse: cast removes address space '__percpu' of expression >> include/linux/sched/mm.h:496:23: sparse: sparse: cast removes address space '__percpu' of expression >> include/linux/sched/mm.h:496:23: sparse: sparse: cast removes address space '__percpu' of expression include/linux/sched/mm.h:497:17: sparse: sparse: cast removes address space '__percpu' of expression include/linux/sched/mm.h:497:17: sparse: sparse: cast removes address space '__percpu' of expression include/linux/sched/mm.h:497:17: sparse: sparse: cast removes address space '__percpu' of expression fs/notify/inotify/inotify_fsnotify.c: note: in included file (through include/linux/preempt.h, include/linux/sched.h, include/linux/rcupdate.h, ...): arch/x86/include/asm/preempt.h:27:16: sparse: sparse: cast removes address space '__percpu' of expression fs/notify/inotify/inotify_fsnotify.c: note: in included file (through include/linux/sched.h, include/linux/rcupdate.h, include/linux/rculist.h, ...): arch/x86/include/asm/current.h:23:24: sparse: sparse: cast removes address space '__percpu' of expression vim +/__percpu +496 include/linux/sched/mm.h d7fefcc8de9147 Aneesh Kumar K.V 2019-03-05 472 d46eb14b735b11 Shakeel Butt 2018-08-17 473 #ifdef CONFIG_MEMCG 37d5985c003daa Roman Gushchin 2020-10-17 474 DECLARE_PER_CPU(struct mem_cgroup *, int_active_memcg); d46eb14b735b11 Shakeel Butt 2018-08-17 475 /** b87d8cefe43c7f Roman Gushchin 2020-10-17 476 * set_active_memcg - Starts the remote memcg charging scope. d46eb14b735b11 Shakeel Butt 2018-08-17 477 * @memcg: memcg to charge. d46eb14b735b11 Shakeel Butt 2018-08-17 478 * d46eb14b735b11 Shakeel Butt 2018-08-17 479 * This function marks the beginning of the remote memcg charging scope. All the d46eb14b735b11 Shakeel Butt 2018-08-17 480 * __GFP_ACCOUNT allocations till the end of the scope will be charged to the d46eb14b735b11 Shakeel Butt 2018-08-17 481 * given memcg. d46eb14b735b11 Shakeel Butt 2018-08-17 482 * e86828e5446d95 Roman Gushchin 2023-10-19 483 * Please, make sure that caller has a reference to the passed memcg structure, e86828e5446d95 Roman Gushchin 2023-10-19 484 * so its lifetime is guaranteed to exceed the scope between two e86828e5446d95 Roman Gushchin 2023-10-19 485 * set_active_memcg() calls. e86828e5446d95 Roman Gushchin 2023-10-19 486 * b87d8cefe43c7f Roman Gushchin 2020-10-17 487 * NOTE: This function can nest. Users must save the return value and b87d8cefe43c7f Roman Gushchin 2020-10-17 488 * reset the previous value after their own charging scope is over. d46eb14b735b11 Shakeel Butt 2018-08-17 489 */ b87d8cefe43c7f Roman Gushchin 2020-10-17 490 static inline struct mem_cgroup * b87d8cefe43c7f Roman Gushchin 2020-10-17 491 set_active_memcg(struct mem_cgroup *memcg) d46eb14b735b11 Shakeel Butt 2018-08-17 492 { 37d5985c003daa Roman Gushchin 2020-10-17 493 struct mem_cgroup *old; 37d5985c003daa Roman Gushchin 2020-10-17 494 55a68c82395185 Vasily Averin 2021-09-02 495 if (!in_task()) { 37d5985c003daa Roman Gushchin 2020-10-17 @496 old = this_cpu_read(int_active_memcg); 37d5985c003daa Roman Gushchin 2020-10-17 497 this_cpu_write(int_active_memcg, memcg); 37d5985c003daa Roman Gushchin 2020-10-17 498 } else { 37d5985c003daa Roman Gushchin 2020-10-17 499 old = current->active_memcg; d46eb14b735b11 Shakeel Butt 2018-08-17 500 current->active_memcg = memcg; 37d5985c003daa Roman Gushchin 2020-10-17 501 } 37d5985c003daa Roman Gushchin 2020-10-17 502 b87d8cefe43c7f Roman Gushchin 2020-10-17 503 return old; d46eb14b735b11 Shakeel Butt 2018-08-17 504 } d46eb14b735b11 Shakeel Butt 2018-08-17 505 #else b87d8cefe43c7f Roman Gushchin 2020-10-17 506 static inline struct mem_cgroup * b87d8cefe43c7f Roman Gushchin 2020-10-17 507 set_active_memcg(struct mem_cgroup *memcg) d46eb14b735b11 Shakeel Butt 2018-08-17 508 { b87d8cefe43c7f Roman Gushchin 2020-10-17 509 return NULL; d46eb14b735b11 Shakeel Butt 2018-08-17 510 } d46eb14b735b11 Shakeel Butt 2018-08-17 511 #endif d46eb14b735b11 Shakeel Butt 2018-08-17 512 :::::: The code at line 496 was first introduced by commit :::::: 37d5985c003daab138a72dd4af9853b396d91c26 mm: kmem: prepare remote memcg charging infra for interrupt contexts :::::: TO: Roman Gushchin :::::: CC: Linus Torvalds -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki