linux-kernel - Re: [PATCH v1 8/9] mm/vma: Use unmap_desc in vms_clear_ptes() and exit

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Message-ID: <202509121212.sx5Tfe4e-lkp@intel.com>
Date: Fri, 12 Sep 2025 13:08:46 +0800
From: kernel test robot <lkp@...el.com>
To: "Liam R. Howlett" <Liam.Howlett@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	Linux Memory Management List <linux-mm@...ck.org>,
	maple-tree@...ts.infradead.org, linux-kernel@...r.kernel.org,
	David Hildenbrand <david@...hat.com>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Michal Hocko <mhocko@...e.com>, Jann Horn <jannh@...gle.com>,
	Pedro Falcato <pfalcato@...e.de>,
	Charan Teja Kalla <quic_charante@...cinc.com>,
	shikemeng@...weicloud.com, kasong@...cent.com, nphamcs@...il.com,
	bhe@...hat.com, baohua@...nel.org, chrisl@...nel.org,
	Matthew Wilcox <willy@...radead.org>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>
Subject: Re: [PATCH v1 8/9] mm/vma: Use unmap_desc in vms_clear_ptes() and
 exit_mmap()

Hi Liam,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[cannot apply to linus/master v6.17-rc5 next-20250911]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Liam-R-Howlett/mm-mmap-Move-exit_mmap-trace-point/20250910-031555
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20250909190945.1030905-9-Liam.Howlett%40oracle.com
patch subject: [PATCH v1 8/9] mm/vma: Use unmap_desc in vms_clear_ptes() and exit_mmap()
config: arm-allnoconfig (https://download.01.org/0day-ci/archive/20250912/202509121212.sx5Tfe4e-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 21857ae337e0892a5522b6e7337899caa61de2a6)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250912/202509121212.sx5Tfe4e-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/202509121212.sx5Tfe4e-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from mm/filemap.c:53:
   In file included from mm/internal.h:23:
>> mm/vma.h:173:22: error: use of undeclared identifier 'USER_PGTABLES_CEILING'
     173 |         desc->last_pgaddr = USER_PGTABLES_CEILING;
         |                             ^~~~~~~~~~~~~~~~~~~~~
   In file included from mm/filemap.c:65:
   mm/swap.h:461:10: error: call to undeclared function 'swp_offset'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     461 |                 return swp_offset(folio->swap);
         |                        ^
   2 errors generated.
--
   In file included from mm/oom_kill.c:50:
   In file included from mm/internal.h:23:
>> mm/vma.h:173:22: error: use of undeclared identifier 'USER_PGTABLES_CEILING'
     173 |         desc->last_pgaddr = USER_PGTABLES_CEILING;
         |                             ^~~~~~~~~~~~~~~~~~~~~
   1 error generated.


vim +/USER_PGTABLES_CEILING +173 mm/vma.h

   166	
   167	static inline void unmap_all_init(struct unmap_desc *desc,
   168			struct vma_iterator *vmi, struct vm_area_struct *vma)
   169	{
   170		desc->mas = &vmi->mas;
   171		desc->first = vma;
   172		desc->first_pgaddr = FIRST_USER_ADDRESS;
 > 173		desc->last_pgaddr = USER_PGTABLES_CEILING;
   174		desc->vma_min = 0;
   175		desc->vma_max = ULONG_MAX;
   176		desc->tree_max = ULONG_MAX;
   177		desc->tree_reset = vma->vm_end;
   178		desc->mm_wr_locked = false;
   179	}
   180	

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