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Message-ID: <202511191640.3qEkK2oZ-lkp@intel.com>
Date: Wed, 19 Nov 2025 17:33:31 +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: llvm@...ts.linux.dev, 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: powerpc64-randconfig-001-20251119 (https://download.01.org/0day-ci/archive/20251119/202511191640.3qEkK2oZ-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251119/202511191640.3qEkK2oZ-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/202511191640.3qEkK2oZ-lkp@intel.com/
All errors (new ones prefixed by >>):
>> drivers/cxl/core/region.c:892:9: error: call to undeclared function '__platform_region_matches_cxld'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
892 | return platform_region_matches_cxld(p, cxld);
| ^
drivers/cxl/core/platform_quirks.h:48:38: note: expanded from macro 'platform_region_matches_cxld'
48 | #define platform_region_matches_cxld DECLARE_TESTABLE(platform_region_matches_cxld)
| ^
drivers/cxl/core/platform_quirks.h:46:29: note: expanded from macro 'DECLARE_TESTABLE'
46 | #define DECLARE_TESTABLE(x) __##x
| ^
<scratch space>:63:1: note: expanded from here
63 | __platform_region_matches_cxld
| ^
drivers/cxl/core/region.c:892:9: note: did you mean 'platform_region_matches_cxld'?
drivers/cxl/core/platform_quirks.h:48:38: note: expanded from macro 'platform_region_matches_cxld'
48 | #define platform_region_matches_cxld DECLARE_TESTABLE(platform_region_matches_cxld)
| ^
drivers/cxl/core/platform_quirks.h:46:29: note: expanded from macro 'DECLARE_TESTABLE'
46 | #define DECLARE_TESTABLE(x) __##x
| ^
<scratch space>:63:1: note: expanded from here
63 | __platform_region_matches_cxld
| ^
drivers/cxl/core/platform_quirks.h:31:1: note: 'platform_region_matches_cxld' declared here
31 | platform_region_matches_cxld(const struct cxl_region_params *p,
| ^
>> drivers/cxl/core/region.c:1837:7: error: call to undeclared function '__platform_cxlrd_matches_cxled'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1837 | if (platform_cxlrd_matches_cxled(cxlrd, cxled))
| ^
drivers/cxl/core/platform_quirks.h:47:38: note: expanded from macro 'platform_cxlrd_matches_cxled'
47 | #define platform_cxlrd_matches_cxled DECLARE_TESTABLE(platform_cxlrd_matches_cxled)
| ^
drivers/cxl/core/platform_quirks.h:46:29: note: expanded from macro 'DECLARE_TESTABLE'
46 | #define DECLARE_TESTABLE(x) __##x
| ^
<scratch space>:101:1: note: expanded from here
101 | __platform_cxlrd_matches_cxled
| ^
drivers/cxl/core/region.c:1837:7: note: did you mean 'platform_cxlrd_matches_cxled'?
drivers/cxl/core/platform_quirks.h:47:38: note: expanded from macro 'platform_cxlrd_matches_cxled'
47 | #define platform_cxlrd_matches_cxled DECLARE_TESTABLE(platform_cxlrd_matches_cxled)
| ^
drivers/cxl/core/platform_quirks.h:46:29: note: expanded from macro 'DECLARE_TESTABLE'
46 | #define DECLARE_TESTABLE(x) __##x
| ^
<scratch space>:101:1: note: expanded from here
101 | __platform_cxlrd_matches_cxled
| ^
drivers/cxl/core/platform_quirks.h:24:1: note: 'platform_cxlrd_matches_cxled' declared here
24 | platform_cxlrd_matches_cxled(const struct cxl_root_decoder *cxlrd,
| ^
drivers/cxl/core/region.c:2056:32: error: call to undeclared function '__platform_cxlrd_matches_cxled'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
2056 | resource_size(p->res) && !platform_cxlrd_matches_cxled(cxlrd, cxled)) {
| ^
drivers/cxl/core/platform_quirks.h:47:38: note: expanded from macro 'platform_cxlrd_matches_cxled'
47 | #define platform_cxlrd_matches_cxled DECLARE_TESTABLE(platform_cxlrd_matches_cxled)
| ^
drivers/cxl/core/platform_quirks.h:46:29: note: expanded from macro 'DECLARE_TESTABLE'
46 | #define DECLARE_TESTABLE(x) __##x
| ^
<scratch space>:102:1: note: expanded from here
102 | __platform_cxlrd_matches_cxled
| ^
drivers/cxl/core/region.c:3490:4: error: call to undeclared function '__platform_cxlrd_matches_cxled'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
3490 | (platform_cxlrd_matches_cxled(cxlrd, cxled));
| ^
drivers/cxl/core/platform_quirks.h:47:38: note: expanded from macro 'platform_cxlrd_matches_cxled'
47 | #define platform_cxlrd_matches_cxled DECLARE_TESTABLE(platform_cxlrd_matches_cxled)
| ^
drivers/cxl/core/platform_quirks.h:46:29: note: expanded from macro 'DECLARE_TESTABLE'
46 | #define DECLARE_TESTABLE(x) __##x
| ^
<scratch space>:84:1: note: expanded from here
84 | __platform_cxlrd_matches_cxled
| ^
4 errors generated.
vim +/__platform_region_matches_cxld +892 drivers/cxl/core/region.c
384e624bb211b4 Dan Williams 2022-06-07 872
c43521b9db7f5e Dave Jiang 2025-11-06 873 static bool spa_maps_hpa(const struct cxl_region_params *p,
0f6f1982cb28ab Dave Jiang 2025-10-10 874 const struct range *range)
0ec9849b63338d Dave Jiang 2025-02-26 875 {
7c15a3666e848d Fabio M. De Francesco 2025-11-18 876 struct cxl_decoder *cxld;
7c15a3666e848d Fabio M. De Francesco 2025-11-18 877
0ec9849b63338d Dave Jiang 2025-02-26 878 if (!p->res)
0ec9849b63338d Dave Jiang 2025-02-26 879 return false;
0ec9849b63338d Dave Jiang 2025-02-26 880
0ec9849b63338d Dave Jiang 2025-02-26 881 /*
8d27dd0b219f00 Dave Jiang 2025-11-06 882 * The extended linear cache region is constructed by a 1:1 ratio
8d27dd0b219f00 Dave Jiang 2025-11-06 883 * where the SPA maps equal amounts of DRAM and CXL HPA capacity with
8d27dd0b219f00 Dave Jiang 2025-11-06 884 * CXL decoders at the high end of the SPA range.
0ec9849b63338d Dave Jiang 2025-02-26 885 */
7c15a3666e848d Fabio M. De Francesco 2025-11-18 886 if (p->res->start + p->cache_size == range->start &&
7c15a3666e848d Fabio M. De Francesco 2025-11-18 887 p->res->end == range->end)
7c15a3666e848d Fabio M. De Francesco 2025-11-18 888 return true;
7c15a3666e848d Fabio M. De Francesco 2025-11-18 889
7c15a3666e848d Fabio M. De Francesco 2025-11-18 890 cxld = container_of(range, struct cxl_decoder, hpa_range);
7c15a3666e848d Fabio M. De Francesco 2025-11-18 891
7c15a3666e848d Fabio M. De Francesco 2025-11-18 @892 return platform_region_matches_cxld(p, cxld);
0ec9849b63338d Dave Jiang 2025-02-26 893 }
0ec9849b63338d Dave Jiang 2025-02-26 894
--
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https://github.com/intel/lkp-tests/wiki
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