Hi Neeraj,

kernel test robot noticed the following build warnings:

[auto build test WARNING on f11a5f89910a7ae970fbce4fdc02d86a8ba8570f]

url:    
https://github.com/intel-lab-lkp/linux/commits/Neeraj-Kumar/nvdimm-label-Introduce-NDD_CXL_LABEL-flag-to-set-cxl-label-format/20250730-202209
base:   f11a5f89910a7ae970fbce4fdc02d86a8ba8570f
patch link:    
https://lore.kernel.org/r/20250730121209.303202-19-s.neeraj%40samsung.com
patch subject: [PATCH V2 18/20] cxl/pmem: Add support of cxl lsa 2.1 support in 
cxl pmem
config: i386-randconfig-011-20250731 
(https://download.01.org/0day-ci/archive/20250731/202507310929.lj3dlryh-...@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0
reproduce (this is a W=1 build): 
(https://download.01.org/0day-ci/archive/20250731/202507310929.lj3dlryh-...@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 <l...@intel.com>
| Closes: 
https://lore.kernel.org/oe-kbuild-all/202507310929.lj3dlryh-...@intel.com/

All warnings (new ones prefixed by >>):

   drivers/cxl/core/region.c: In function 'create_pmem_region':
>> drivers/cxl/core/region.c:2692:35: warning: variable 'cxl_nvb' set but not 
>> used [-Wunused-but-set-variable]
    2692 |         struct cxl_nvdimm_bridge *cxl_nvb;
         |                                   ^~~~~~~


vim +/cxl_nvb +2692 drivers/cxl/core/region.c

  2687  
  2688  void create_pmem_region(struct nvdimm *nvdimm)
  2689  {
  2690          struct cxl_nvdimm *cxl_nvd;
  2691          struct cxl_memdev *cxlmd;
> 2692          struct cxl_nvdimm_bridge *cxl_nvb;
  2693          struct cxl_pmem_region_params *params;
  2694          struct cxl_root_decoder *cxlrd;
  2695          struct cxl_decoder *cxld;
  2696          struct cxl_region *cxlr;
  2697  
  2698          if (!nvdimm_has_cxl_region(nvdimm))
  2699                  return;
  2700  
  2701          lockdep_assert_held(&cxl_rwsem.region);
  2702          cxl_nvd = nvdimm_provider_data(nvdimm);
  2703          params = nvdimm_get_cxl_region_param(nvdimm);
  2704          cxlmd = cxl_nvd->cxlmd;
  2705          cxl_nvb = cxlmd->cxl_nvb;
  2706          cxlrd = cxlmd->cxlrd;
  2707  
  2708          /*
  2709           * FIXME: Limitation: Region creation support only for
  2710           * interleave way == 1
  2711           */
  2712          if (!(params->nlabel == 1))
  2713                  dev_info(&cxlmd->dev,
  2714                           "Region Creation is not supported with iw > 
1\n");
  2715          else {
  2716                  cxld = cxl_find_free_ep_decoder(cxlmd->endpoint);
  2717                  cxlr = cxl_create_region(cxlrd, CXL_PARTMODE_PMEM,
  2718                                           atomic_read(&cxlrd->region_id),
  2719                                           params, cxld);
  2720                  if (IS_ERR(cxlr))
  2721                          dev_info(&cxlmd->dev, "Region Creation 
failed\n");
  2722          }
  2723  }
  2724  EXPORT_SYMBOL_NS_GPL(create_pmem_region, "CXL");
  2725  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

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