linux-kernel - Re: [PATCH v4 15/26] mm/hugetlb: Drop __unmap_hugepage

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Date:   Fri, 16 Jul 2021 01:05:20 +0800
From:   kernel test robot <lkp@...el.com>
To:     Peter Xu <peterx@...hat.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Miaohe Lin <linmiaohe@...wei.com>,
        "Kirill A . Shutemov" <kirill@...temov.name>,
        Hugh Dickins <hughd@...gle.com>, Jason Gunthorpe <jgg@...pe.ca>
Subject: Re: [PATCH v4 15/26] mm/hugetlb: Drop __unmap_hugepage_range
 definition from hugetlb.h

Hi Peter,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.14-rc1 next-20210715]
[cannot apply to hnaz-linux-mm/master asm-generic/master linux/master]
[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]

url:    https://github.com/0day-ci/linux/commits/Peter-Xu/userfaultfd-wp-Support-shmem-and-hugetlbfs/20210715-062718
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 8096acd7442e613fad0354fc8dfdb2003cceea0b
config: i386-randconfig-s002-20210714 (attached as .config)
compiler: gcc-10 (Debian 10.2.1-6) 10.2.1 20210110
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/f8dd355edbfe948f84c8aaa10a5173656aa2778c
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Peter-Xu/userfaultfd-wp-Support-shmem-and-hugetlbfs/20210715-062718
        git checkout f8dd355edbfe948f84c8aaa10a5173656aa2778c
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)
>> mm/hugetlb.c:4334:6: sparse: sparse: symbol '__unmap_hugepage_range' was not declared. Should it be static?
   mm/hugetlb.c:444:12: sparse: sparse: context imbalance in 'allocate_file_region_entries' - wrong count at exit
   mm/hugetlb.c:517:13: sparse: sparse: context imbalance in 'region_add' - wrong count at exit
   mm/hugetlb.c:584:13: sparse: sparse: context imbalance in 'region_chg' - wrong count at exit
   mm/hugetlb.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/mm.h):
   include/linux/page-flags.h:183:29: sparse: sparse: context imbalance in 'hugetlb_cow' - unexpected unlock
   mm/hugetlb.c:5386:25: sparse: sparse: context imbalance in 'follow_hugetlb_page' - different lock contexts for basic block

Please review and possibly fold the followup patch.

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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