linux-kernel - Re: [PATCH 1/6] prctl: introduce PR_THP_POLICY_DEFAULT

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Message-ID: <202505161340.aOL3UHxo-lkp@intel.com>
Date: Fri, 16 May 2025 14:12:40 +0800
From: kernel test robot <lkp@...el.com>
To: Usama Arif <usamaarif642@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>, david@...hat.com
Cc: oe-kbuild-all@...ts.linux.dev,
	Linux Memory Management List <linux-mm@...ck.org>,
	hannes@...xchg.org, shakeel.butt@...ux.dev, riel@...riel.com,
	ziy@...dia.com, laoar.shao@...il.com, baolin.wang@...ux.alibaba.com,
	lorenzo.stoakes@...cle.com, Liam.Howlett@...cle.com,
	npache@...hat.com, ryan.roberts@....com,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	kernel-team@...a.com, Usama Arif <usamaarif642@...il.com>
Subject: Re: [PATCH 1/6] prctl: introduce PR_THP_POLICY_DEFAULT_HUGE for the
 process

Hi Usama,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on perf-tools-next/perf-tools-next tip/perf/core perf-tools/perf-tools linus/master v6.15-rc6]
[cannot apply to acme/perf/core next-20250515]
[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/Usama-Arif/prctl-introduce-PR_THP_POLICY_DEFAULT_HUGE-for-the-process/20250515-213850
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20250515133519.2779639-2-usamaarif642%40gmail.com
patch subject: [PATCH 1/6] prctl: introduce PR_THP_POLICY_DEFAULT_HUGE for the process
config: sparc-allnoconfig (https://download.01.org/0day-ci/archive/20250516/202505161340.aOL3UHxo-lkp@intel.com/config)
compiler: sparc-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250516/202505161340.aOL3UHxo-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/202505161340.aOL3UHxo-lkp@intel.com/

All errors (new ones prefixed by >>):

   mm/vma.c: In function '__mmap_new_vma':
>> mm/vma.c:2486:9: error: implicit declaration of function 'vma_set_thp_policy'; did you mean 'vma_dup_policy'? [-Wimplicit-function-declaration]
    2486 |         vma_set_thp_policy(vma);
         |         ^~~~~~~~~~~~~~~~~~
         |         vma_dup_policy


vim +2486 mm/vma.c

  2472	
  2473		/* Lock the VMA since it is modified after insertion into VMA tree */
  2474		vma_start_write(vma);
  2475		vma_iter_store_new(vmi, vma);
  2476		map->mm->map_count++;
  2477		vma_link_file(vma);
  2478	
  2479		/*
  2480		 * vma_merge_new_range() calls khugepaged_enter_vma() too, the below
  2481		 * call covers the non-merge case.
  2482		 */
  2483		if (!vma_is_anonymous(vma))
  2484			khugepaged_enter_vma(vma, map->flags);
  2485		ksm_add_vma(vma);
> 2486		vma_set_thp_policy(vma);
  2487		*vmap = vma;
  2488		return 0;
  2489	
  2490	free_iter_vma:
  2491		vma_iter_free(vmi);
  2492	free_vma:
  2493		vm_area_free(vma);
  2494		return error;
  2495	}
  2496	

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