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X-CSE-ConnectionGUID: yrpNM1LjSm+i9bgK0TdEgw== X-CSE-MsgGUID: Kt9/ALs8SL24D6cC5ik5+w== X-IronPort-AV: E=McAfee;i="6800,10657,11698"; a="74640959" X-IronPort-AV: E=Sophos;i="6.21,286,1763452800"; d="scan'208";a="74640959" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Feb 2026 22:02:10 -0800 X-CSE-ConnectionGUID: 26tH01k6QNyjFIklZ6n1ug== X-CSE-MsgGUID: ZsJBb3I8SXObdc9YfmVs8w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,286,1763452800"; d="scan'208";a="235462530" Received: from lkp-server01.sh.intel.com (HELO 765f4a05e27f) ([10.239.97.150]) by fmviesa002.fm.intel.com with ESMTP; 11 Feb 2026 22:02:08 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1vqPm9-00000000qkm-3mA5; Thu, 12 Feb 2026 06:02:05 +0000 Date: Thu, 12 Feb 2026 14:01:32 +0800 From: kernel test robot To: Dave Jiang , linux-cxl@vger.kernel.org Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, dave@stgolabs.net, jonathan.cameron@huawei.com, alison.schofield@intel.com, vishal.l.verma@intel.com, ira.weiny@intel.com, dan.j.williams@intel.com Subject: Re: [PATCH v2 3/3] cxl: Clean up cxl_nvdimm devices when removing nvdimm_bus Message-ID: <202602121343.8IGnsS7f-lkp@intel.com> References: <20260211232630.480509-4-dave.jiang@intel.com> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260211232630.480509-4-dave.jiang@intel.com> Hi Dave, kernel test robot noticed the following build warnings: [auto build test WARNING on 63fbf275fa9f18f7020fb8acf54fa107e51d0f23] url: https://github.com/intel-lab-lkp/linux/commits/Dave-Jiang/cxl-Move-devm_cxl_add_nvdimm_bridge-to-cxl_pmem-ko/20260212-073008 base: 63fbf275fa9f18f7020fb8acf54fa107e51d0f23 patch link: https://lore.kernel.org/r/20260211232630.480509-4-dave.jiang%40intel.com patch subject: [PATCH v2 3/3] cxl: Clean up cxl_nvdimm devices when removing nvdimm_bus config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20260212/202602121343.8IGnsS7f-lkp@intel.com/config) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260212/202602121343.8IGnsS7f-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/202602121343.8IGnsS7f-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/cxl/pmem.c:407:7: warning: variable 'cxl_nvd' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] 407 | if (dev->driver) { | ^~~~~~~~~~~ drivers/cxl/pmem.c:416:10: note: uninitialized use occurs here 416 | cxlmd = cxl_nvd->cxlmd; | ^~~~~~~ drivers/cxl/pmem.c:407:3: note: remove the 'if' if its condition is always true 407 | if (dev->driver) { | ^~~~~~~~~~~~~~~~ drivers/cxl/pmem.c:399:28: note: initialize the variable 'cxl_nvd' to silence this warning 399 | struct cxl_nvdimm *cxl_nvd; | ^ | = NULL 1 warning generated. vim +407 drivers/cxl/pmem.c 8fdcb1704f61a8 Dan Williams 2021-06-15 396 19398821b25a9c Dan Williams 2023-01-20 397 static int detach_nvdimm(struct device *dev, void *data) 19398821b25a9c Dan Williams 2023-01-20 398 { 19398821b25a9c Dan Williams 2023-01-20 399 struct cxl_nvdimm *cxl_nvd; 5f761998c93e30 Dave Jiang 2026-02-11 400 struct cxl_memdev *cxlmd; 19398821b25a9c Dan Williams 2023-01-20 401 bool release = false; 19398821b25a9c Dan Williams 2023-01-20 402 19398821b25a9c Dan Williams 2023-01-20 403 if (!is_cxl_nvdimm(dev)) 19398821b25a9c Dan Williams 2023-01-20 404 return 0; 19398821b25a9c Dan Williams 2023-01-20 405 7f569e917b7866 Li Ming 2024-08-30 406 scoped_guard(device, dev) { 7f569e917b7866 Li Ming 2024-08-30 @407 if (dev->driver) { 19398821b25a9c Dan Williams 2023-01-20 408 cxl_nvd = to_cxl_nvdimm(dev); 19398821b25a9c Dan Williams 2023-01-20 409 if (cxl_nvd->cxlmd && cxl_nvd->cxlmd->cxl_nvb == data) 19398821b25a9c Dan Williams 2023-01-20 410 release = true; 7f569e917b7866 Li Ming 2024-08-30 411 } 7f569e917b7866 Li Ming 2024-08-30 412 } 19398821b25a9c Dan Williams 2023-01-20 413 if (release) 19398821b25a9c Dan Williams 2023-01-20 414 device_release_driver(dev); 5f761998c93e30 Dave Jiang 2026-02-11 415 5f761998c93e30 Dave Jiang 2026-02-11 416 cxlmd = cxl_nvd->cxlmd; 5f761998c93e30 Dave Jiang 2026-02-11 417 devm_release_action(&cxlmd->dev, cxlmd_release_nvdimm, cxlmd); 5f761998c93e30 Dave Jiang 2026-02-11 418 19398821b25a9c Dan Williams 2023-01-20 419 return 0; 19398821b25a9c Dan Williams 2023-01-20 420 } 19398821b25a9c Dan Williams 2023-01-20 421 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki