linux-kernel - Re: [PATCH v3 06/22] mm: Always use page table accessor functions

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Message-ID: <202511131118.UUi1EVXL-lkp@intel.com>
Date: Thu, 13 Nov 2025 13:46:28 +0800
From: kernel test robot <lkp@...el.com>
To: Samuel Holland <samuel.holland@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>, Paul Walmsley <pjw@...nel.org>,
	linux-riscv@...ts.infradead.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Hildenbrand <david@...hat.com>
Cc: oe-kbuild-all@...ts.linux.dev,
	Linux Memory Management List <linux-mm@...ck.org>,
	devicetree@...r.kernel.org, Suren Baghdasaryan <surenb@...gle.com>,
	linux-kernel@...r.kernel.org, Mike Rapoport <rppt@...nel.org>,
	Michal Hocko <mhocko@...e.com>, Conor Dooley <conor@...nel.org>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Alexandre Ghiti <alex@...ti.fr>,
	Emil Renner Berthing <kernel@...il.dk>,
	Rob Herring <robh+dt@...nel.org>, Vlastimil Babka <vbabka@...e.cz>,
	"Liam R . Howlett" <Liam.Howlett@...cle.com>,
	Samuel Holland <samuel.holland@...ive.com>,
	Julia Lawall <julia.lawall@...ia.fr>,
	Nicolas Palix <nicolas.palix@...g.fr>
Subject: Re: [PATCH v3 06/22] mm: Always use page table accessor functions

Hi Samuel,

kernel test robot noticed the following build errors:

[auto build test ERROR on 24172e0d79900908cf5ebf366600616d29c9b417]

url:    https://github.com/intel-lab-lkp/linux/commits/Samuel-Holland/mm-ptdump-replace-READ_ONCE-with-standard-page-table-accessors/20251113-095117
base:   24172e0d79900908cf5ebf366600616d29c9b417
patch link:    https://lore.kernel.org/r/20251113014656.2605447-7-samuel.holland%40sifive.com
patch subject: [PATCH v3 06/22] mm: Always use page table accessor functions
config: powerpc-allnoconfig (https://download.01.org/0day-ci/archive/20251113/202511131118.UUi1EVXL-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251113/202511131118.UUi1EVXL-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/202511131118.UUi1EVXL-lkp@intel.com/

All errors (new ones prefixed by >>):

   mm/madvise.c: In function 'guard_install_set_pte':
>> mm/madvise.c:1119:9: error: implicit declaration of function 'set_pte'; did you mean 'set_ptes'? [-Wimplicit-function-declaration]
    1119 |         set_pte(ptep, make_pte_marker(PTE_MARKER_GUARD));
         |         ^~~~~~~
         |         set_ptes


vim +1119 mm/madvise.c

  1112	
  1113	static int guard_install_set_pte(unsigned long addr, unsigned long next,
  1114					 pte_t *ptep, struct mm_walk *walk)
  1115	{
  1116		unsigned long *nr_pages = (unsigned long *)walk->private;
  1117	
  1118		/* Simply install a PTE marker, this causes segfault on access. */
> 1119		set_pte(ptep, make_pte_marker(PTE_MARKER_GUARD));
  1120		(*nr_pages)++;
  1121	
  1122		return 0;
  1123	}
  1124	

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