linux-kernel - Re: [PATCH v3 1/3] mm: unified hmm fault and migrate device pagewalk paths

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Message-ID: <202601270202.cL2IcE86-lkp@intel.com>
Date: Tue, 27 Jan 2026 02:48:43 +0800
From: kernel test robot <lkp@...el.com>
To: mpenttil@...hat.com, linux-mm@...ck.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Mika Penttilä <mpenttil@...hat.com>,
	David Hildenbrand <david@...hat.com>,
	Jason Gunthorpe <jgg@...dia.com>,
	Leon Romanovsky <leonro@...dia.com>,
	Alistair Popple <apopple@...dia.com>,
	Balbir Singh <balbirs@...dia.com>, Zi Yan <ziy@...dia.com>,
	Matthew Brost <matthew.brost@...el.com>
Subject: Re: [PATCH v3 1/3] mm: unified hmm fault and migrate device pagewalk
 paths

Hi,

kernel test robot noticed the following build errors:

[auto build test ERROR on 63804fed149a6750ffd28610c5c1c98cce6bd377]

url:    https://github.com/intel-lab-lkp/linux/commits/mpenttil-redhat-com/mm-unified-hmm-fault-and-migrate-device-pagewalk-paths/20260126-192236
base:   63804fed149a6750ffd28610c5c1c98cce6bd377
patch link:    https://lore.kernel.org/r/20260126111939.1332983-2-mpenttil%40redhat.com
patch subject: [PATCH v3 1/3] mm: unified hmm fault and migrate device pagewalk paths
config: x86_64-randconfig-013-20260126 (https://download.01.org/0day-ci/archive/20260127/202601270202.cL2IcE86-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260127/202601270202.cL2IcE86-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/202601270202.cL2IcE86-lkp@intel.com/

All errors (new ones prefixed by >>):

>> mm/hmm.c:927:31: error: no member named 'owner' in 'struct mmu_notifier_range'
     927 |         if (!hmm_vma_walk->mmu_range.owner) {
         |              ~~~~~~~~~~~~~~~~~~~~~~~ ^
   mm/hmm.c:1343:24: error: call to undeclared function 'mmu_interval_check_retry'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1343 |                 if (is_fault_path && mmu_interval_check_retry(range->notifier,
         |                                      ^
   mm/hmm.c:1361:29: error: no member named 'owner' in 'struct mmu_notifier_range'
    1361 |             hmm_vma_walk.mmu_range.owner) {
         |             ~~~~~~~~~~~~~~~~~~~~~~ ^
   3 errors generated.


vim +927 mm/hmm.c

   906	
   907	static int hmm_vma_capture_migrate_range(unsigned long start,
   908						 unsigned long end,
   909						 struct mm_walk *walk)
   910	{
   911		struct hmm_vma_walk *hmm_vma_walk = walk->private;
   912		struct hmm_range *range = hmm_vma_walk->range;
   913	
   914		if (!hmm_select_migrate(range))
   915			return 0;
   916	
   917		if (hmm_vma_walk->vma && (hmm_vma_walk->vma != walk->vma))
   918			return -ERANGE;
   919	
   920		hmm_vma_walk->vma = walk->vma;
   921		hmm_vma_walk->start = start;
   922		hmm_vma_walk->end = end;
   923	
   924		if (end - start > range->end - range->start)
   925			return -ERANGE;
   926	
 > 927		if (!hmm_vma_walk->mmu_range.owner) {
   928			mmu_notifier_range_init_owner(&hmm_vma_walk->mmu_range, MMU_NOTIFY_MIGRATE, 0,
   929						      walk->vma->vm_mm, start, end,
   930						      range->dev_private_owner);
   931			mmu_notifier_invalidate_range_start(&hmm_vma_walk->mmu_range);
   932		}
   933	
   934		return 0;
   935	}
   936	

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