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X-CSE-ConnectionGUID: 4tm4s8RIQ2+H105a9Yk+bQ== X-CSE-MsgGUID: x1KqE8FhQLeC356wJAJg9g== X-IronPort-AV: E=McAfee;i="6800,10657,11738"; a="85930221" X-IronPort-AV: E=Sophos;i="6.23,138,1770624000"; d="scan'208";a="85930221" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by fmvoesa105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Mar 2026 14:41:04 -0700 X-CSE-ConnectionGUID: 4L/TwHuzTnqf3lmjx+iuNg== X-CSE-MsgGUID: ijaPWGiyQE+NeHlYFuOIUw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,138,1770624000"; d="scan'208";a="221294134" Received: from lkp-server01.sh.intel.com (HELO 3905d212be1b) ([10.239.97.150]) by fmviesa008.fm.intel.com with ESMTP; 23 Mar 2026 14:41:03 -0700 Received: from kbuild by 3905d212be1b with local (Exim 4.98.2) (envelope-from ) id 1w4n1A-000000003G1-2F6p; Mon, 23 Mar 2026 21:41:00 +0000 Date: Tue, 24 Mar 2026 05:40:29 +0800 From: kernel test robot To: oe-kbuild@lists.linux.dev Cc: lkp@intel.com, Julia Lawall Subject: mm/cma.c:770:24-29: ERROR: iterator variable bound on line 768 cannot be NULL Message-ID: <202603240529.BOykxDXR-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: oe-kbuild@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: BCC: lkp@intel.com CC: oe-kbuild-all@lists.linux.dev CC: linux-kernel@vger.kernel.org TO: "Yury Norov (NVIDIA)" CC: Andrew Morton CC: Linux Memory Management List tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c369299895a591d96745d6492d4888259b004a9e commit: 77c50f9147eabcf726f62c73167bb9d9e8621a43 mm: cma: simplify cma_debug_show_areas() date: 8 months ago :::::: branch date: 24 hours ago :::::: commit date: 8 months ago config: s390-randconfig-r051-20260323 (https://download.01.org/0day-ci/archive/20260324/202603240529.BOykxDXR-lkp@intel.com/config) compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project c911b8492374942bf4cfe35411e90a35d3837f6a) 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 | Reported-by: Julia Lawall | Closes: https://lore.kernel.org/r/202603240529.BOykxDXR-lkp@intel.com/ cocci warnings: (new ones prefixed by >>) >> mm/cma.c:770:24-29: ERROR: iterator variable bound on line 768 cannot be NULL vim +770 mm/cma.c c009da4258f988 Frank van der Linden 2025-02-28 751 dbe43d4d2837da Jaewon Kim 2017-02-24 752 static void cma_debug_show_areas(struct cma *cma) dbe43d4d2837da Jaewon Kim 2017-02-24 753 { 77c50f9147eabc Yury Norov (NVIDIA 2025-07-19 754) unsigned long start, end; 7365ff2c8eef4e Frank van der Linden 2025-02-28 755 unsigned long nr_part; c009da4258f988 Frank van der Linden 2025-02-28 756 unsigned long nbits; c009da4258f988 Frank van der Linden 2025-02-28 757 int r; c009da4258f988 Frank van der Linden 2025-02-28 758 struct cma_memrange *cmr; dbe43d4d2837da Jaewon Kim 2017-02-24 759 0ef7dcac998fef Mike Kravetz 2021-05-04 760 spin_lock_irq(&cma->lock); dbe43d4d2837da Jaewon Kim 2017-02-24 761 pr_info("number of available pages: "); c009da4258f988 Frank van der Linden 2025-02-28 762 for (r = 0; r < cma->nranges; r++) { c009da4258f988 Frank van der Linden 2025-02-28 763 cmr = &cma->ranges[r]; c009da4258f988 Frank van der Linden 2025-02-28 764 c009da4258f988 Frank van der Linden 2025-02-28 765 nbits = cma_bitmap_maxno(cma, cmr); c009da4258f988 Frank van der Linden 2025-02-28 766 c009da4258f988 Frank van der Linden 2025-02-28 767 pr_info("range %d: ", r); 77c50f9147eabc Yury Norov (NVIDIA 2025-07-19 @768) for_each_clear_bitrange(start, end, cmr->bitmap, nbits) { 77c50f9147eabc Yury Norov (NVIDIA 2025-07-19 769) nr_part = (end - start) << cma->order_per_bit; 77c50f9147eabc Yury Norov (NVIDIA 2025-07-19 @770) pr_cont("%s%lu@%lu", start ? "+" : "", nr_part, start); dbe43d4d2837da Jaewon Kim 2017-02-24 771 } c009da4258f988 Frank van der Linden 2025-02-28 772 pr_info("\n"); c009da4258f988 Frank van der Linden 2025-02-28 773 } 7365ff2c8eef4e Frank van der Linden 2025-02-28 774 pr_cont("=> %lu free of %lu total pages\n", cma->available_count, 7365ff2c8eef4e Frank van der Linden 2025-02-28 775 cma->count); 0ef7dcac998fef Mike Kravetz 2021-05-04 776 spin_unlock_irq(&cma->lock); dbe43d4d2837da Jaewon Kim 2017-02-24 777 } dbe43d4d2837da Jaewon Kim 2017-02-24 778 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki