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Date:   Mon, 25 Sep 2023 10:04:03 +0800
From:   kernel test robot <lkp@intel.com>
To:     riel@surriel.com, linux-kernel@vger.kernel.org
Cc:     oe-kbuild-all@lists.linux.dev, kernel-team@meta.com,
        linux-mm@kvack.org, akpm@linux-foundation.org,
        muchun.song@linux.dev, mike.kravetz@oracle.com, leit@meta.com,
        willy@infradead.org, Rik van Riel <riel@surriel.com>
Subject: Re: [PATCH 3/3] hugetlbfs: replace hugetlb_vma_lock with
 invalidate_lock
Message-ID: <202309250923.NEPT0ip2-lkp@intel.com>
References: <20230922190552.3963067-4-riel@surriel.com>
MIME-Version: 1.0
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In-Reply-To: <20230922190552.3963067-4-riel@surriel.com>
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Hi,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on linus/master v6.6-rc3 next-20230921]
[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/riel-surriel-com/hugetlbfs-extend-hugetlb_vma_lock-to-private-VMAs/20230923-030756
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20230922190552.3963067-4-riel%40surriel.com
patch subject: [PATCH 3/3] hugetlbfs: replace hugetlb_vma_lock with invalidate_lock
config: x86_64-randconfig-013-20230925 (https://download.01.org/0day-ci/archive/20230925/202309250923.NEPT0ip2-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230925/202309250923.NEPT0ip2-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/202309250923.NEPT0ip2-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/x86/include/asm/bug.h:87,
                    from include/linux/bug.h:5,
                    from include/linux/thread_info.h:13,
                    from arch/x86/include/asm/preempt.h:9,
                    from include/linux/preempt.h:79,
                    from include/linux/spinlock.h:56,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:7,
                    from include/linux/slab.h:16,
                    from fs/nfs/write.c:11:
   include/linux/hugetlb.h: In function 'hugetlb_walk':
>> include/linux/hugetlb.h:1285:42: error: dereferencing pointer to incomplete type 'struct hugetlb_vma_lock'
    1285 |   WARN_ON_ONCE(!lockdep_is_held(&vma_lock->rw_sema) &&
         |                                          ^~
   include/asm-generic/bug.h:111:25: note: in definition of macro 'WARN_ON_ONCE'
     111 |  int __ret_warn_on = !!(condition);   \
         |                         ^~~~~~~~~
   include/linux/hugetlb.h:1285:17: note: in expansion of macro 'lockdep_is_held'
    1285 |   WARN_ON_ONCE(!lockdep_is_held(&vma_lock->rw_sema) &&
         |                 ^~~~~~~~~~~~~~~


vim +1285 include/linux/hugetlb.h

185d8dcce62020 Rik van Riel 2023-09-22  1265  
9c67a20704e763 Peter Xu     2022-12-16  1266  /*
9c67a20704e763 Peter Xu     2022-12-16  1267   * Safe version of huge_pte_offset() to check the locks.  See comments
9c67a20704e763 Peter Xu     2022-12-16  1268   * above huge_pte_offset().
9c67a20704e763 Peter Xu     2022-12-16  1269   */
9c67a20704e763 Peter Xu     2022-12-16  1270  static inline pte_t *
9c67a20704e763 Peter Xu     2022-12-16  1271  hugetlb_walk(struct vm_area_struct *vma, unsigned long addr, unsigned long sz)
9c67a20704e763 Peter Xu     2022-12-16  1272  {
9c67a20704e763 Peter Xu     2022-12-16  1273  #if defined(CONFIG_HUGETLB_PAGE) && \
9c67a20704e763 Peter Xu     2022-12-16  1274  	defined(CONFIG_ARCH_WANT_HUGE_PMD_SHARE) && defined(CONFIG_LOCKDEP)
9c67a20704e763 Peter Xu     2022-12-16  1275  	struct hugetlb_vma_lock *vma_lock = vma->vm_private_data;
9c67a20704e763 Peter Xu     2022-12-16  1276  
9c67a20704e763 Peter Xu     2022-12-16  1277  	/*
9c67a20704e763 Peter Xu     2022-12-16  1278  	 * If pmd sharing possible, locking needed to safely walk the
9c67a20704e763 Peter Xu     2022-12-16  1279  	 * hugetlb pgtables.  More information can be found at the comment
9c67a20704e763 Peter Xu     2022-12-16  1280  	 * above huge_pte_offset() in the same file.
9c67a20704e763 Peter Xu     2022-12-16  1281  	 *
9c67a20704e763 Peter Xu     2022-12-16  1282  	 * NOTE: lockdep_is_held() is only defined with CONFIG_LOCKDEP.
9c67a20704e763 Peter Xu     2022-12-16  1283  	 */
9c67a20704e763 Peter Xu     2022-12-16  1284  	if (__vma_shareable_lock(vma))
9c67a20704e763 Peter Xu     2022-12-16 @1285  		WARN_ON_ONCE(!lockdep_is_held(&vma_lock->rw_sema) &&
9c67a20704e763 Peter Xu     2022-12-16  1286  			     !lockdep_is_held(
9c67a20704e763 Peter Xu     2022-12-16  1287  				 &vma->vm_file->f_mapping->i_mmap_rwsem));
9c67a20704e763 Peter Xu     2022-12-16  1288  #endif
9c67a20704e763 Peter Xu     2022-12-16  1289  	return huge_pte_offset(vma->vm_mm, addr, sz);
9c67a20704e763 Peter Xu     2022-12-16  1290  }
9c67a20704e763 Peter Xu     2022-12-16  1291  

-- 
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https://github.com/intel/lkp-tests/wiki