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X-CSE-ConnectionGUID: AbCHhZXGScmLgiJVPcyTAA== X-CSE-MsgGUID: EAti6D+GRV2CbVteyCUeOg== X-IronPort-AV: E=McAfee;i="6800,10657,11537"; a="61492377" X-IronPort-AV: E=Sophos;i="6.18,225,1751266800"; d="scan'208";a="61492377" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Aug 2025 03:15:42 -0700 X-CSE-ConnectionGUID: Yd7pGHJCS8a9JmBAGnJB0g== X-CSE-MsgGUID: FjUQrYhLTKmLfPBtkw2XBg== X-ExtLoop1: 1 Received: from lkp-server02.sh.intel.com (HELO 4ea60e6ab079) ([10.239.97.151]) by fmviesa003.fm.intel.com with ESMTP; 31 Aug 2025 03:15:41 -0700 Received: from kbuild by 4ea60e6ab079 with local (Exim 4.96) (envelope-from ) id 1usf5x-000W4h-1a; Sun, 31 Aug 2025 10:15:35 +0000 Date: Sun, 31 Aug 2025 18:15:31 +0800 From: kernel test robot To: Peter Xu Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Andrew Morton , Linux Memory Management List Subject: mm/mprotect.c:450:23: sparse: sparse: cast to non-scalar Message-ID: <202508311724.Mp4RhDNi-lkp@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c8bc81a52d5a2ac2e4b257ae123677cf94112755 commit: cb0f01beb16669e91510fcdb2cea213931aee017 mm/mprotect: fix dax pud handlings date: 12 months ago config: arm64-randconfig-r121-20250831 (https://download.01.org/0day-ci/archive/20250831/202508311724.Mp4RhDNi-lkp@intel.com/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project ac23f7465eedd0dd565ffb201f573e7a69695fa3) reproduce: (https://download.01.org/0day-ci/archive/20250831/202508311724.Mp4RhDNi-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/202508311724.Mp4RhDNi-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) mm/mprotect.c: note: in included file (through include/linux/pgtable.h, include/linux/mm.h, include/linux/pagewalk.h): arch/arm64/include/asm/pgtable.h:315:16: sparse: sparse: cast to non-scalar arch/arm64/include/asm/pgtable.h:315:16: sparse: sparse: cast from non-scalar arch/arm64/include/asm/pgtable.h:315:16: sparse: sparse: cast to non-scalar arch/arm64/include/asm/pgtable.h:315:16: sparse: sparse: cast from non-scalar arch/arm64/include/asm/pgtable.h:315:16: sparse: sparse: cast to non-scalar arch/arm64/include/asm/pgtable.h:315:16: sparse: sparse: cast from non-scalar mm/mprotect.c: note: in included file (through include/linux/rbtree.h, include/linux/mm_types.h, include/linux/mmzone.h, ...): include/linux/rcupdate.h:869:25: sparse: sparse: context imbalance in 'change_pte_range' - unexpected unlock >> mm/mprotect.c:450:23: sparse: sparse: cast to non-scalar >> mm/mprotect.c:450:23: sparse: sparse: cast from non-scalar mm/mprotect.c: note: in included file (through include/linux/mm.h, include/linux/pagewalk.h): include/linux/pgtable.h:324:16: sparse: sparse: cast to non-scalar include/linux/pgtable.h:324:16: sparse: sparse: cast from non-scalar mm/mprotect.c: note: in included file (through include/linux/pgtable.h, include/linux/mm.h, include/linux/pagewalk.h): arch/arm64/include/asm/pgtable.h:315:16: sparse: sparse: cast to non-scalar arch/arm64/include/asm/pgtable.h:315:16: sparse: sparse: cast from non-scalar arch/arm64/include/asm/pgtable.h:315:16: sparse: sparse: cast to non-scalar arch/arm64/include/asm/pgtable.h:315:16: sparse: sparse: cast from non-scalar vim +450 mm/mprotect.c 428 429 static inline long change_pud_range(struct mmu_gather *tlb, 430 struct vm_area_struct *vma, p4d_t *p4d, unsigned long addr, 431 unsigned long end, pgprot_t newprot, unsigned long cp_flags) 432 { 433 struct mmu_notifier_range range; 434 pud_t *pudp, pud; 435 unsigned long next; 436 long pages = 0, ret; 437 438 range.start = 0; 439 440 pudp = pud_offset(p4d, addr); 441 do { 442 again: 443 next = pud_addr_end(addr, end); 444 ret = change_prepare(vma, pudp, pmd, addr, cp_flags); 445 if (ret) { 446 pages = ret; 447 break; 448 } 449 > 450 pud = READ_ONCE(*pudp); 451 if (pud_none(pud)) 452 continue; 453 454 if (!range.start) { 455 mmu_notifier_range_init(&range, 456 MMU_NOTIFY_PROTECTION_VMA, 0, 457 vma->vm_mm, addr, end); 458 mmu_notifier_invalidate_range_start(&range); 459 } 460 461 if (pud_leaf(pud)) { 462 if ((next - addr != PUD_SIZE) || 463 pgtable_split_needed(vma, cp_flags)) { 464 __split_huge_pud(vma, pudp, addr); 465 goto again; 466 } else { 467 ret = change_huge_pud(tlb, vma, pudp, 468 addr, newprot, cp_flags); 469 if (ret == 0) 470 goto again; 471 /* huge pud was handled */ 472 if (ret == HPAGE_PUD_NR) 473 pages += HPAGE_PUD_NR; 474 continue; 475 } 476 } 477 478 pages += change_pmd_range(tlb, vma, pudp, addr, next, newprot, 479 cp_flags); 480 } while (pudp++, addr = next, addr != end); 481 482 if (range.start) 483 mmu_notifier_invalidate_range_end(&range); 484 485 return pages; 486 } 487 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki