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R . Silva" , "Liam R . Howlett" , Matthew Wilcox , =?utf-8?B?TWljaGHFgiBNaXJvc8WCYXc=?= , Mike Rapoport , Nadav Amit , Pasha Tatashin , Paul Gofman , Peter Xu , Shuah Khan , Suren Baghdasaryan , Vlastimil Babka , Yang Shi , Yun Zhou , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [v2] fs/proc/task_mmu: Implement IOCTL for efficient page table scanning Message-ID: <202307222141.3RAiL0jR-lkp@intel.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Rspamd-Queue-Id: 3C2D11A000E X-Rspam-User: X-Stat-Signature: kyewhju5camey93o9wiqxqdmd64aba5a X-Rspamd-Server: rspam01 X-HE-Tag: 1690034778-640962 X-HE-Meta: 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 RPo9nyRk Sy5i1RlhJt2kT7fBLl0LMSow9brG/aajuGjXJyheFEY0s5RsYgOfm3tsoTVszWbceYNqDkuDSnQ3NXzvTvR1Q7a5mKtNa7W2i0W3eepC1pR79ppiwCPGEDlLuh+aBTabPfDYFM9z9jrlvb9w/0zCI4+91DUamUSKbQ/H+KIO7DfnXrNFbv22dSDNQwYF7q6r1dlXSh4PmhMk3lbhkvX8TpFY28gW6JgI9H4K3l30vdZ2bDumjWjhcu1jP5yuf4ycVm3g7rpxuqunZ4azxmvu0gu5Xt+GB4Q1aMTo1MCf7hOH5qSYVnUVQFhsoPe2SqCB+M+GYqfNsFIsdlVtcx3zdfzmutDQrTlP4AehwMvKFLr6CA3lE2uApFCTcbtuT+HQwQjubtMUkQ2ZRlymZ7wCmwZ5f/wdjJz0nI7Mz X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi Michał, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] [also build test ERROR on linus/master v6.5-rc2 next-20230721] [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/Micha-Miros-aw/fs-proc-task_mmu-Implement-IOCTL-for-efficient-page-table-scanning/20230722-082500 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/ZLshsAj5PbsEAHhP%40qmqm.qmqm.pl patch subject: [v2] fs/proc/task_mmu: Implement IOCTL for efficient page table scanning config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20230722/202307222141.3RAiL0jR-lkp@intel.com/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce: (https://download.01.org/0day-ci/archive/20230722/202307222141.3RAiL0jR-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202307222141.3RAiL0jR-lkp@intel.com/ All errors (new ones prefixed by >>): fs/proc/task_mmu.c: In function 'pagemap_scan_test_walk': fs/proc/task_mmu.c:1921:13: error: implicit declaration of function 'userfaultfd_wp_async'; did you mean 'userfaultfd_wp'? [-Werror=implicit-function-declaration] 1921 | if (userfaultfd_wp_async(vma) && userfaultfd_wp_use_markers(vma)) | ^~~~~~~~~~~~~~~~~~~~ | userfaultfd_wp fs/proc/task_mmu.c: In function 'pagemap_scan_thp_entry': >> fs/proc/task_mmu.c:2047:20: error: 'addr' undeclared (first use in this function) 2047 | if (end != addr + HPAGE_SIZE) { | ^~~~ fs/proc/task_mmu.c:2047:20: note: each undeclared identifier is reported only once for each function it appears in cc1: some warnings being treated as errors vim +/addr +2047 fs/proc/task_mmu.c 2017 2018 static int pagemap_scan_thp_entry(pmd_t *pmd, unsigned long start, 2019 unsigned long end, struct mm_walk *walk) 2020 { 2021 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 2022 struct pagemap_scan_private *p = walk->private; 2023 struct vm_area_struct *vma = walk->vma; 2024 unsigned long categories; 2025 spinlock_t *ptl; 2026 int ret = 0; 2027 2028 ptl = pmd_trans_huge_lock(pmd, vma); 2029 if (!ptl) 2030 return -ENOENT; 2031 2032 categories = p->cur_vma_category | pagemap_thp_category(*pmd); 2033 2034 ret = pagemap_scan_output(categories, p, start, &end); 2035 if (start == end) 2036 goto out_unlock; 2037 2038 if (~p->arg.flags & PM_SCAN_WP_MATCHING) 2039 goto out_unlock; 2040 if (~categories & PAGE_IS_WRITTEN) 2041 goto out_unlock; 2042 2043 /* 2044 * Break huge page into small pages if the WP operation 2045 * need to be performed is on a portion of the huge page. 2046 */ > 2047 if (end != addr + HPAGE_SIZE) { 2048 spin_unlock(ptl); 2049 split_huge_pmd(vma, pmd, start); 2050 pagemap_scan_backout_range(p, start, end); 2051 return -ENOENT; 2052 } 2053 2054 make_uffd_wp_pmd(vma, start, pmd); 2055 flush_tlb_range(vma, start, end); 2056 out_unlock: 2057 spin_unlock(ptl); 2058 return ret; 2059 #else /* !CONFIG_TRANSPARENT_HUGEPAGE */ 2060 return -ENOENT; 2061 #endif 2062 } 2063 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki