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X-IronPort-AV: E=McAfee;i="6600,9927,10920"; a="397362713" X-IronPort-AV: E=Sophos;i="6.04,266,1695711600"; d="scan'208";a="397362713" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Dec 2023 13:44:10 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10920"; a="890856178" X-IronPort-AV: E=Sophos;i="6.04,266,1695711600"; d="scan'208";a="890856178" Received: from lkp-server02.sh.intel.com (HELO b07ab15da5fe) ([10.239.97.151]) by fmsmga002.fm.intel.com with ESMTP; 10 Dec 2023 13:44:09 -0800 Received: from kbuild by b07ab15da5fe with local (Exim 4.96) (envelope-from ) id 1rCRap-000HIM-1s; Sun, 10 Dec 2023 21:44:07 +0000 Date: Mon, 11 Dec 2023 05:44:02 +0800 From: kernel test robot To: oe-kbuild@lists.linux.dev Cc: lkp@intel.com Subject: mm/memory.c:709:25: sparse: sparse: cast to non-scalar Message-ID: <202312110527.2ixYcotR-lkp@intel.com> Precedence: bulk X-Mailing-List: oe-kbuild@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline :::::: :::::: Manual check reason: "low confidence static check warning: mm/memory.c:709:25: sparse: sparse: cast to non-scalar" :::::: BCC: lkp@intel.com CC: oe-kbuild-all@lists.linux.dev CC: linux-kernel@vger.kernel.org TO: Alistair Popple CC: Dan Carpenter CC: Christoph Hellwig CC: Andrew Morton CC: Linux Memory Management List tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 3a87498869d6d1e7347cd01f337a77984604eb5e commit: b756a3b5e7ead8f6f4b03cea8ac22478ce04c8a8 mm: device exclusive memory access date: 2 years, 5 months ago :::::: branch date: 3 hours ago :::::: commit date: 2 years, 5 months ago config: alpha-randconfig-r131-20231116 (https://download.01.org/0day-ci/archive/20231211/202312110527.2ixYcotR-lkp@intel.com/config) compiler: alpha-linux-gcc (GCC) 13.2.0 reproduce: (https://download.01.org/0day-ci/archive/20231211/202312110527.2ixYcotR-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/r/202312110527.2ixYcotR-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> mm/memory.c:709:25: sparse: sparse: cast to non-scalar >> mm/memory.c:709:25: sparse: sparse: cast from non-scalar mm/memory.c:284:46: sparse: sparse: self-comparison always evaluates to false mm/memory.c:318:46: sparse: sparse: self-comparison always evaluates to false mm/memory.c:1023:17: sparse: sparse: context imbalance in 'copy_pte_range' - different lock contexts for basic block mm/memory.c:1196:61: sparse: sparse: self-comparison always evaluates to false mm/memory.c:1220:61: sparse: sparse: self-comparison always evaluates to false mm/memory.c:1736:16: sparse: sparse: context imbalance in '__get_locked_pte' - different lock contexts for basic block mm/memory.c:1785:9: sparse: sparse: context imbalance in 'insert_page' - different lock contexts for basic block mm/memory.c:2287:17: sparse: sparse: context imbalance in 'remap_pte_range' - different lock contexts for basic block mm/memory.c:2344:46: sparse: sparse: self-comparison always evaluates to false mm/memory.c:2366:46: sparse: sparse: self-comparison always evaluates to false mm/memory.c:2543:17: sparse: sparse: context imbalance in 'apply_to_pte_range' - unexpected unlock mm/memory.c:2616:46: sparse: sparse: self-comparison always evaluates to false mm/memory.c:2652:46: sparse: sparse: self-comparison always evaluates to false mm/memory.c:2831:17: sparse: sparse: context imbalance in 'wp_page_copy' - unexpected unlock mm/memory.c:3180:17: sparse: sparse: context imbalance in 'wp_pfn_shared' - unexpected unlock mm/memory.c:3243:19: sparse: sparse: context imbalance in 'do_wp_page' - different lock contexts for basic block mm/memory.c: note: in included file (through include/linux/mm.h, arch/alpha/include/asm/io.h, include/linux/io.h, include/linux/irq.h, ...): include/linux/pgtable.h:275:16: sparse: sparse: cast to non-scalar include/linux/pgtable.h:275:16: sparse: sparse: cast from non-scalar mm/memory.c:4874:5: sparse: sparse: context imbalance in 'follow_invalidate_pte' - different lock contexts for basic block mm/memory.c:4995:9: sparse: sparse: context imbalance in 'follow_pfn' - unexpected unlock vim +709 mm/memory.c 28093f9f34cede Gerald Schaefer 2016-04-28 701 b756a3b5e7ead8 Alistair Popple 2021-06-30 702 static void restore_exclusive_pte(struct vm_area_struct *vma, b756a3b5e7ead8 Alistair Popple 2021-06-30 703 struct page *page, unsigned long address, b756a3b5e7ead8 Alistair Popple 2021-06-30 704 pte_t *ptep) b756a3b5e7ead8 Alistair Popple 2021-06-30 705 { b756a3b5e7ead8 Alistair Popple 2021-06-30 706 pte_t pte; b756a3b5e7ead8 Alistair Popple 2021-06-30 707 swp_entry_t entry; b756a3b5e7ead8 Alistair Popple 2021-06-30 708 b756a3b5e7ead8 Alistair Popple 2021-06-30 @709 pte = pte_mkold(mk_pte(page, READ_ONCE(vma->vm_page_prot))); b756a3b5e7ead8 Alistair Popple 2021-06-30 710 if (pte_swp_soft_dirty(*ptep)) b756a3b5e7ead8 Alistair Popple 2021-06-30 711 pte = pte_mksoft_dirty(pte); b756a3b5e7ead8 Alistair Popple 2021-06-30 712 b756a3b5e7ead8 Alistair Popple 2021-06-30 713 entry = pte_to_swp_entry(*ptep); b756a3b5e7ead8 Alistair Popple 2021-06-30 714 if (pte_swp_uffd_wp(*ptep)) b756a3b5e7ead8 Alistair Popple 2021-06-30 715 pte = pte_mkuffd_wp(pte); b756a3b5e7ead8 Alistair Popple 2021-06-30 716 else if (is_writable_device_exclusive_entry(entry)) b756a3b5e7ead8 Alistair Popple 2021-06-30 717 pte = maybe_mkwrite(pte_mkdirty(pte), vma); b756a3b5e7ead8 Alistair Popple 2021-06-30 718 b756a3b5e7ead8 Alistair Popple 2021-06-30 719 set_pte_at(vma->vm_mm, address, ptep, pte); b756a3b5e7ead8 Alistair Popple 2021-06-30 720 b756a3b5e7ead8 Alistair Popple 2021-06-30 721 /* b756a3b5e7ead8 Alistair Popple 2021-06-30 722 * No need to take a page reference as one was already b756a3b5e7ead8 Alistair Popple 2021-06-30 723 * created when the swap entry was made. b756a3b5e7ead8 Alistair Popple 2021-06-30 724 */ b756a3b5e7ead8 Alistair Popple 2021-06-30 725 if (PageAnon(page)) b756a3b5e7ead8 Alistair Popple 2021-06-30 726 page_add_anon_rmap(page, vma, address, false); b756a3b5e7ead8 Alistair Popple 2021-06-30 727 else b756a3b5e7ead8 Alistair Popple 2021-06-30 728 /* b756a3b5e7ead8 Alistair Popple 2021-06-30 729 * Currently device exclusive access only supports anonymous b756a3b5e7ead8 Alistair Popple 2021-06-30 730 * memory so the entry shouldn't point to a filebacked page. b756a3b5e7ead8 Alistair Popple 2021-06-30 731 */ b756a3b5e7ead8 Alistair Popple 2021-06-30 732 WARN_ON_ONCE(!PageAnon(page)); b756a3b5e7ead8 Alistair Popple 2021-06-30 733 b756a3b5e7ead8 Alistair Popple 2021-06-30 734 if (vma->vm_flags & VM_LOCKED) b756a3b5e7ead8 Alistair Popple 2021-06-30 735 mlock_vma_page(page); b756a3b5e7ead8 Alistair Popple 2021-06-30 736 b756a3b5e7ead8 Alistair Popple 2021-06-30 737 /* b756a3b5e7ead8 Alistair Popple 2021-06-30 738 * No need to invalidate - it was non-present before. However b756a3b5e7ead8 Alistair Popple 2021-06-30 739 * secondary CPUs may have mappings that need invalidating. b756a3b5e7ead8 Alistair Popple 2021-06-30 740 */ b756a3b5e7ead8 Alistair Popple 2021-06-30 741 update_mmu_cache(vma, address, ptep); b756a3b5e7ead8 Alistair Popple 2021-06-30 742 } b756a3b5e7ead8 Alistair Popple 2021-06-30 743 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki