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Mon, 21 Jan 2019 16:19:22 +0000 Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserv0022.oracle.com (8.14.4/8.14.4) with ESMTP id x0LGJHOj015989 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 21 Jan 2019 16:19:17 GMT Received: from abhmp0007.oracle.com (abhmp0007.oracle.com [141.146.116.13]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x0LGJGqo004621; Mon, 21 Jan 2019 16:19:16 GMT Received: from [192.168.1.93] (/99.156.91.244) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 21 Jan 2019 08:19:16 -0800 Subject: Re: [PATCH v1] fs/jfs: Switch to use new generic UUID API To: Christoph Hellwig , Andy Shevchenko Cc: linux-kernel@vger.kernel.org, Dave Kleikamp , jfs-discussion@lists.sourceforge.net References: <20190110134153.83901-1-andriy.shevchenko@linux.intel.com> <20190121084950.GG18680@lst.de> From: Dave Kleikamp Openpgp: preference=signencrypt Autocrypt: addr=dave.kleikamp@oracle.com; prefer-encrypt=mutual; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190121084950.GG18680@lst.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9143 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1901210128 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/21/19 2:49 AM, Christoph Hellwig wrote: >> + buf->f_fsid.val[1] = (u32)crc32_le(0, (char *)&sbi->uuid + sizeof(sbi->uuid)/2, > > This adds an overly long line, and has weird operator spacing. > > In fact given how much deep magic it does it should probably be moved > into a helper and properly documented when you touch it anyway. > I cleaned this up a bit when I pushed it to the jfs tree. https://github.com/kleikamp/linux-shaggy/commit/2e3bc6125154c691e987e2554f2c99ec10f83b73 Here's the relevant part. It's still a bit ugly, but I got rid of an unnecessary cast and kept the lines from exceeding 80 characters. diff --git a/fs/jfs/super.c b/fs/jfs/super.c index 65d8fc87ab11..c15ff56a8516 100644 --- a/fs/jfs/super.c +++ b/fs/jfs/super.c @@ -174,9 +174,11 @@ static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf) buf->f_files = maxinodes; buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - atomic_read(&imap->im_numfree)); - buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2); - buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2, - sizeof(sbi->uuid)/2); + buf->f_fsid.val[0] = crc32_le(0, (char *)&sbi->uuid, + sizeof(sbi->uuid)/2); + buf->f_fsid.val[1] = crc32_le(0, + (char *)&sbi->uuid + sizeof(sbi->uuid)/2, + sizeof(sbi->uuid)/2); buf->f_namelen = JFS_NAME_MAX; return 0;