From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6ACC07C for ; Sun, 12 Jun 2022 02:26:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1655000787; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Po+OITd9LduODB5Ll6LkiNrsN4yFiLHBsGMIZQJ3aw4=; b=XuXyb3C+LrMmvFry/8khNl0UE1wcXQEY2Mp6J1Po0FeWoi1yY9b4MBI6ST/rXJSxKcDKwd b37+Wb3sD5D3TfimOkaVASRvu9AOv77TSxupJPgyg7wYXKk8j6Hke1z0EUZaMUcvcc2zfz KI8IXXq/jXrY391T0rGJSfWjgj5Qt5E= Received: from mail-pg1-f197.google.com (mail-pg1-f197.google.com [209.85.215.197]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-385-zxtyWeSvN6eBI7h4lqyV0A-1; Sat, 11 Jun 2022 22:26:24 -0400 X-MC-Unique: zxtyWeSvN6eBI7h4lqyV0A-1 Received: by mail-pg1-f197.google.com with SMTP id 78-20020a630051000000b003fe25580679so1713512pga.9 for ; Sat, 11 Jun 2022 19:26:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=Po+OITd9LduODB5Ll6LkiNrsN4yFiLHBsGMIZQJ3aw4=; b=USj2uNOn4J4dOBxvN8SrxHVObfqOXrVUcdvvYyDceRvYt5zhMLzhoTN6TnQfzl1YYI VMP9IGMv90EFP/i+zzmV5KrqNSdDYlsfJtx4eRRXBimLo/eCSOG0LGY4BlOlUYcX2V6I nKAR5o6e+6/9fGbzPo4SDcueczErLHLZci7U+r17hWpUt427sEjTtn2Z8lmMOdb4Yc5N rG+CCMf4CD+CxOhaMP7cCFYnFjBwVIDY3zNFrMCIa9Xq5kRUZzO/mbJm08sl3UdJ6GvZ HwYeB8Igih0U8odiyyJnZGGAXI6/+EhxkI9MRzDzBHGdFCSAEpCSCOeIA9DFRGbR/B1e lVrA== X-Gm-Message-State: AOAM532EmD6HtFbON3NQ6jG9Zsd+TMsH3x4GV8Y3SA272MdfIxTX+gMK STnglIuIvU+v+VzUP+2MaoGg8S2ocCQO8F1ta3ND7wU3ElcONp/G9aEojKpWj1tEfQeKs1RlNPn mEm69tyyuoivpLA== X-Received: by 2002:a17:902:7449:b0:167:9520:d063 with SMTP id e9-20020a170902744900b001679520d063mr26178526plt.146.1655000781883; Sat, 11 Jun 2022 19:26:21 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxSUdWj0g6z3wcj79WuGy61sOTinJ+Xh99UhjKXW2wg576bkRRUKMKz5+wx7YOmEnrejlsPhA== X-Received: by 2002:a17:902:7449:b0:167:9520:d063 with SMTP id e9-20020a170902744900b001679520d063mr26178517plt.146.1655000781571; Sat, 11 Jun 2022 19:26:21 -0700 (PDT) Received: from [10.72.12.41] ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id s4-20020a170903200400b0016223016d79sm2188658pla.90.2022.06.11.19.26.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 11 Jun 2022 19:26:20 -0700 (PDT) Subject: Re: [ceph-client:testing 7/9] lib/iov_iter.c:1464:9: warning: comparison of distinct pointer types ('typeof (nr * ((1UL) << (12)) - offset) *' (aka 'unsigned long *') and 'typeof (maxsize) *' (aka 'unsigned int *')) To: kernel test robot , David Howells Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, ceph-devel@vger.kernel.org, Jeff Layton References: <202206112305.4DdsErK8-lkp@intel.com> From: Xiubo Li Message-ID: Date: Sun, 12 Jun 2022 10:26:14 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: <202206112305.4DdsErK8-lkp@intel.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=xiubli@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Thanks for the warning report. These was introduced by one DO NOT MEGE patch, which should go into mainline via David Howells's tree IMO. -- Xiubo On 6/11/22 11:10 PM, kernel test robot wrote: > tree: https://github.com/ceph/ceph-client.git testing > head: 7b864d005b1f7f6a144420e180891b6401078407 > commit: 3adeefbfca0fd57cc943b7ec0330385f48041f0c [7/9] [DO NOT MERGE] iov_iter: Fix iter_xarray_get_pages{,_alloc}() > config: riscv-randconfig-r034-20220611 (https://download.01.org/0day-ci/archive/20220611/202206112305.4DdsErK8-lkp@intel.com/config) > compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project ff4abe755279a3a47cc416ef80dbc900d9a98a19) > reproduce (this is a W=1 build): > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # install riscv cross compiling tool for clang build > # apt-get install binutils-riscv-linux-gnu > # https://github.com/ceph/ceph-client/commit/3adeefbfca0fd57cc943b7ec0330385f48041f0c > git remote add ceph-client https://github.com/ceph/ceph-client.git > git fetch --no-tags ceph-client testing > git checkout 3adeefbfca0fd57cc943b7ec0330385f48041f0c > # save the config file > mkdir build_dir && cp config build_dir/.config > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash > > If you fix the issue, kindly add following tag where applicable > Reported-by: kernel test robot > > All warnings (new ones prefixed by >>): > >>> lib/iov_iter.c:1464:9: warning: comparison of distinct pointer types ('typeof (nr * ((1UL) << (12)) - offset) *' (aka 'unsigned long *') and 'typeof (maxsize) *' (aka 'unsigned int *')) [-Wcompare-distinct-pointer-types] > return min(nr * PAGE_SIZE - offset, maxsize); > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > include/linux/minmax.h:45:19: note: expanded from macro 'min' > #define min(x, y) __careful_cmp(x, y, <) > ^~~~~~~~~~~~~~~~~~~~~~ > include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp' > __builtin_choose_expr(__safe_cmp(x, y), \ > ^~~~~~~~~~~~~~~~ > include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp' > (__typecheck(x, y) && __no_side_effects(x, y)) > ^~~~~~~~~~~~~~~~~ > include/linux/minmax.h:20:28: note: expanded from macro '__typecheck' > (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1))) > ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~ > lib/iov_iter.c:1628:9: warning: comparison of distinct pointer types ('typeof (nr * ((1UL) << (12)) - offset) *' (aka 'unsigned long *') and 'typeof (maxsize) *' (aka 'unsigned int *')) [-Wcompare-distinct-pointer-types] > return min(nr * PAGE_SIZE - offset, maxsize); > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > include/linux/minmax.h:45:19: note: expanded from macro 'min' > #define min(x, y) __careful_cmp(x, y, <) > ^~~~~~~~~~~~~~~~~~~~~~ > include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp' > __builtin_choose_expr(__safe_cmp(x, y), \ > ^~~~~~~~~~~~~~~~ > include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp' > (__typecheck(x, y) && __no_side_effects(x, y)) > ^~~~~~~~~~~~~~~~~ > include/linux/minmax.h:20:28: note: expanded from macro '__typecheck' > (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1))) > ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~ > 2 warnings generated. > > > vim +1464 lib/iov_iter.c > > 1430 > 1431 static ssize_t iter_xarray_get_pages(struct iov_iter *i, > 1432 struct page **pages, size_t maxsize, > 1433 unsigned maxpages, size_t *_start_offset) > 1434 { > 1435 unsigned nr, offset; > 1436 pgoff_t index, count; > 1437 size_t size = maxsize; > 1438 loff_t pos; > 1439 > 1440 if (!size || !maxpages) > 1441 return 0; > 1442 > 1443 pos = i->xarray_start + i->iov_offset; > 1444 index = pos >> PAGE_SHIFT; > 1445 offset = pos & ~PAGE_MASK; > 1446 *_start_offset = offset; > 1447 > 1448 count = 1; > 1449 if (size > PAGE_SIZE - offset) { > 1450 size -= PAGE_SIZE - offset; > 1451 count += size >> PAGE_SHIFT; > 1452 size &= ~PAGE_MASK; > 1453 if (size) > 1454 count++; > 1455 } > 1456 > 1457 if (count > maxpages) > 1458 count = maxpages; > 1459 > 1460 nr = iter_xarray_populate_pages(pages, i->xarray, index, count); > 1461 if (nr == 0) > 1462 return 0; > 1463 >> 1464 return min(nr * PAGE_SIZE - offset, maxsize); > 1465 } > 1466 >