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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: Re: fs/proc/task_mmu: Implement IOCTL for efficient page table scanning Message-ID: <202307210528.2qgK1vwi-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-Rspam-User: X-Stat-Signature: sm3mumyqt5mop5dh6wqtgr3e9mqmdpng X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 89D4A1C002A X-HE-Tag: 1689887617-728729 X-HE-Meta: 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 x+qKyStN 1LTNLKM/NEoiKVqD/BElxDXcd6DQIQl+UcmSSOPQOtk1wAqFRFTL2GpPHB0xlo7zNumIKspREkci9tUVhT/oi2wgYwqxRbYFjXuNn4DZplJkg/sUhLRx7F+OMXplUvD8DK0RyTAq5TRrtvERfnCJdKyyJLZVcKr9Ox/Y9M1SPaZpEiiGhyfRI2fNyjpBFSr+J9iSQS1h4EJE/tOhEWfvh0rcHkozleuLv5YvqYau9JcNSO8rouRYMD9mZtMumIWEVk1kMake23OcavogKZRlw/XEbLoruTT39KxX/yeyX9MFQVKQ7a9Q/yoK47muJkjvYF43XVUNeTiVRrCVVjgqIzRpMb+JuViBKxbWlsY9mhUTXAwJEyj+l4aO/ryijYBvyxApdhxz3ukQkq1yL2E8WgjfX4/6owD9TSqn8L//bdBzXft0D3Wtgsp9QyGp45obgzVGoel7inKoTxYyJ1qXLAhcPdg== 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 warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on linus/master v6.5-rc2 next-20230720] [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/Re-fs-proc-task_mmu-Implement-IOCTL-for-efficient-page-table-scanning/20230721-033050 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/a0b5c6776b2ed91f78a7575649f8b100e58bd3a9.1689881078.git.mirq-linux%40rere.qmqm.pl patch subject: Re: fs/proc/task_mmu: Implement IOCTL for efficient page table scanning config: mips-allyesconfig (https://download.01.org/0day-ci/archive/20230721/202307210528.2qgK1vwi-lkp@intel.com/config) compiler: mips-linux-gcc (GCC) 12.3.0 reproduce: (https://download.01.org/0day-ci/archive/20230721/202307210528.2qgK1vwi-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/202307210528.2qgK1vwi-lkp@intel.com/ All warnings (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_init_bounce_buffer': >> fs/proc/task_mmu.c:2290:22: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 2290 | p->vec_out = (void __user *)p->arg.vec; | ^ fs/proc/task_mmu.c: At top level: fs/proc/task_mmu.c:1967:13: warning: 'pagemap_scan_backout_range' defined but not used [-Wunused-function] 1967 | static void pagemap_scan_backout_range(struct pagemap_scan_private *p, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +2290 fs/proc/task_mmu.c 2264 2265 static int pagemap_scan_init_bounce_buffer(struct pagemap_scan_private *p) 2266 { 2267 if (!p->arg.vec_len) { 2268 /* 2269 * An arbitrary non-page-aligned sentinel value for 2270 * pagemap_scan_push_range(). 2271 */ 2272 p->cur_buf.start = p->cur_buf.end = ULLONG_MAX; 2273 return 0; 2274 } 2275 2276 /* 2277 * Allocate a smaller buffer to get output from inside the page 2278 * walk functions and walk the range in PAGEMAP_WALK_SIZE chunks. 2279 * The last range is always stored in p.cur_buf to allow coalescing 2280 * consecutive ranges that have the same categories returned across 2281 * walk_page_range() calls. 2282 */ 2283 p->vec_buf_len = min_t(size_t, PAGEMAP_WALK_SIZE >> PAGE_SHIFT, 2284 p->arg.vec_len - 1); 2285 p->vec_buf = kmalloc_array(p->vec_buf_len, sizeof(*p->vec_buf), 2286 GFP_KERNEL); 2287 if (!p->vec_buf) 2288 return -ENOMEM; 2289 > 2290 p->vec_out = (void __user *)p->arg.vec; 2291 2292 return 0; 2293 } 2294 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki