Re: [RFC PATCH 3/3] mm/migrate: Create move_phys_pages syscall

[kernel test robot <lkp@intel.com>]

Hi Gregory,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on tip/x86/asm linus/master next-20230908]
[cannot apply to arnd-asm-generic/master v6.5]
[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/Gregory-Price/mm-migrate-remove-unused-mm-argument-from-do_move_pages_to_node/20230909-004600
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20230907075453.350554-4-gregory.price%40memverge.com
patch subject: [RFC PATCH 3/3] mm/migrate: Create move_phys_pages syscall
config: x86_64-buildonly-randconfig-002-20230909 (https://download.01.org/0day-ci/archive/20230909/202309090612.A9EmQIQ1-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230909/202309090612.A9EmQIQ1-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309090612.A9EmQIQ1-lkp@intel.com/

All errors (new ones prefixed by >>):

>> mm/migrate.c:2182:42: error: no member named 'owner' in 'struct mm_struct'
           struct task_struct *owner = vma->vm_mm->owner;
                                       ~~~~~~~~~~  ^
   1 error generated.


vim +2182 mm/migrate.c

  2170	
  2171	/*
  2172	 * Walks each vma mapping a given page and determines if those
  2173	 * vma's are both migratable, and that the target node is within
  2174	 * the allowed cpuset of the owning task.
  2175	 */
  2176	static bool phys_page_migratable(struct folio *folio,
  2177					 struct vm_area_struct *vma,
  2178					 unsigned long address,
  2179					 void *arg)
  2180	{
  2181		struct rmap_page_ctxt *ctxt = (struct rmap_page_ctxt *)arg;
> 2182		struct task_struct *owner = vma->vm_mm->owner;
  2183		nodemask_t task_nodes = cpuset_mems_allowed(owner);
  2184	
  2185		ctxt->found |= true;
  2186		ctxt->migratable &= vma_migratable(vma);
  2187		ctxt->node_allowed &= node_isset(ctxt->node, task_nodes);
  2188	
  2189		return ctxt->migratable && ctxt->node_allowed;
  2190	}
  2191	

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