linux-kernel - Re: [PATCH 4/4 v6] cxl/test: Simulate an x86 Low Memory Hole for tests

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Message-ID: <202511191844.tffZI1tp-lkp@intel.com>
Date: Wed, 19 Nov 2025 19:08:00 +0800
From: kernel test robot <lkp@...el.com>
To: "Fabio M. De Francesco" <fabio.m.de.francesco@...ux.intel.com>,
	linux-cxl@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev, Davidlohr Bueso <dave@...olabs.net>,
	Jonathan Cameron <jonathan.cameron@...wei.com>,
	Dave Jiang <dave.jiang@...el.com>,
	Alison Schofield <alison.schofield@...el.com>,
	Vishal Verma <vishal.l.verma@...el.com>,
	Ira Weiny <ira.weiny@...el.com>,
	Dan Williams <dan.j.williams@...el.com>,
	linux-kernel@...r.kernel.org, Gregory Price <gourry@...rry.net>,
	Robert Richter <rrichter@....com>,
	Cheatham Benjamin <benjamin.cheatham@....com>,
	"Fabio M . De Francesco" <fabio.m.de.francesco@...ux.intel.com>
Subject: Re: [PATCH 4/4 v6] cxl/test: Simulate an x86 Low Memory Hole for
 tests

Hi Fabio,

kernel test robot noticed the following build errors:

[auto build test ERROR on 7ec9db66cc552f2f8a6779c16d01a2a01eccedde]

url:    https://github.com/intel-lab-lkp/linux/commits/Fabio-M-De-Francesco/cxl-core-Change-match_-_by_range-signatures/20251119-034652
base:   7ec9db66cc552f2f8a6779c16d01a2a01eccedde
patch link:    https://lore.kernel.org/r/20251118194321.1773484-5-fabio.m.de.francesco%40linux.intel.com
patch subject: [PATCH 4/4 v6] cxl/test: Simulate an x86 Low Memory Hole for tests
config: x86_64-randconfig-161-20251119 (https://download.01.org/0day-ci/archive/20251119/202511191844.tffZI1tp-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251119/202511191844.tffZI1tp-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 <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511191844.tffZI1tp-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/cxl/core/region.c:17:
   drivers/cxl/core/region.c: In function 'spa_maps_hpa':
>> drivers/cxl/core/platform_quirks.h:46:29: error: implicit declaration of function '__platform_region_matches_cxld'; did you mean 'platform_region_matches_cxld'? [-Wimplicit-function-declaration]
      46 | #define DECLARE_TESTABLE(x) __##x
         |                             ^~
   drivers/cxl/core/platform_quirks.h:48:38: note: in expansion of macro 'DECLARE_TESTABLE'
      48 | #define platform_region_matches_cxld DECLARE_TESTABLE(platform_region_matches_cxld)
         |                                      ^~~~~~~~~~~~~~~~
   drivers/cxl/core/region.c:892:16: note: in expansion of macro 'platform_region_matches_cxld'
     892 |         return platform_region_matches_cxld(p, cxld);
         |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/cxl/core/region.c: In function 'match_cxlsd_to_cxled_by_range':
>> drivers/cxl/core/platform_quirks.h:46:29: error: implicit declaration of function '__platform_cxlrd_matches_cxled'; did you mean 'platform_cxlrd_matches_cxled'? [-Wimplicit-function-declaration]
      46 | #define DECLARE_TESTABLE(x) __##x
         |                             ^~
   drivers/cxl/core/platform_quirks.h:47:38: note: in expansion of macro 'DECLARE_TESTABLE'
      47 | #define platform_cxlrd_matches_cxled DECLARE_TESTABLE(platform_cxlrd_matches_cxled)
         |                                      ^~~~~~~~~~~~~~~~
   drivers/cxl/core/region.c:1837:21: note: in expansion of macro 'platform_cxlrd_matches_cxled'
    1837 |                 if (platform_cxlrd_matches_cxled(cxlrd, cxled))
         |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +46 drivers/cxl/core/platform_quirks.h

    44	
    45	#ifndef CXL_TEST_ENABLE
  > 46	#define DECLARE_TESTABLE(x) __##x
    47	#define platform_cxlrd_matches_cxled DECLARE_TESTABLE(platform_cxlrd_matches_cxled)
  > 48	#define platform_region_matches_cxld DECLARE_TESTABLE(platform_region_matches_cxld)
    49	#endif
    50	

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