From patchwork Sat Nov 28 16:14:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11937663 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67E22C63777 for ; Sat, 28 Nov 2020 16:16:40 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 0C8CF2224D for ; Sat, 28 Nov 2020 16:16:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="OD2tKoBY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0C8CF2224D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id BFCD88D0024; Sat, 28 Nov 2020 11:16:14 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id B2C5D8D0017; Sat, 28 Nov 2020 11:16:14 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9CF618D0024; Sat, 28 Nov 2020 11:16:14 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0070.hostedemail.com [216.40.44.70]) by kanga.kvack.org (Postfix) with ESMTP id 743B48D0017 for ; Sat, 28 Nov 2020 11:16:14 -0500 (EST) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 3CF46180AD820 for ; Sat, 28 Nov 2020 16:16:14 +0000 (UTC) X-FDA: 77534329068.30.cent45_590173c27392 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin30.hostedemail.com (Postfix) with ESMTP id 1D47E180B3AA7 for ; Sat, 28 Nov 2020 16:16:14 +0000 (UTC) X-HE-Tag: cent45_590173c27392 X-Filterd-Recvd-Size: 3899 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf11.hostedemail.com (Postfix) with ESMTP for ; Sat, 28 Nov 2020 16:16:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=6IeFZ7Uy1DrTY5BQeLQW1xD1ZXA1ZVFBmMwhjYs91c8=; b=OD2tKoBYgG+uVtFPZskR+VCfm6 Dn1cDNzPYU2IFPF7UFNrmWzFfssUxw/T5V10mv/YAX6prclF9SMQoF0dwbAqxrIxZtYavvNn63LHF dwWFmTULY5nOu/3qJ5F/8QijjB9pHmYvJQEtPpFVzpRqPD2FCrTJLcCw+jgmoF01ta39QLHeaHTKI WQcC8eZAJVI+hWRryL/UBzWTfiRDb1djDySZ/i1z3YbKAAjg7aXmA94oUJeNVLVzXtt1ObrBAbE6F BWD5a9V8AmTbf9mafWd9EuFXxazbtbwbXFUt9AdYpOLDhF1c1XhHD6lMLfEEonkIBN5HjshCv2iug W/lTMuJg==; Received: from [2001:4bb8:18c:1dd6:48f3:741a:602e:7fdd] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kj2tG-0000Ma-DB; Sat, 28 Nov 2020 16:16:03 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Tejun Heo , Josef Bacik , Coly Li , Mike Snitzer , Greg Kroah-Hartman , Jan Kara , Johannes Thumshirn , dm-devel@redhat.com, Jan Kara , linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 29/45] block: initialize struct block_device in bdev_alloc Date: Sat, 28 Nov 2020 17:14:54 +0100 Message-Id: <20201128161510.347752-30-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201128161510.347752-1-hch@lst.de> References: <20201128161510.347752-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html 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: Don't play tricks with slab constructors as bdev structures tends to not get reused very much, and this makes the code a lot less error prone. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Acked-by: Tejun Heo Reviewed-by: Hannes Reinecke --- fs/block_dev.c | 22 +++++++++------------- 1 file changed, 9 insertions(+), 13 deletions(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index 0569f5ebeb6fd0..a5b6955a841f18 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -784,20 +784,11 @@ static void bdev_free_inode(struct inode *inode) kmem_cache_free(bdev_cachep, BDEV_I(inode)); } -static void init_once(void *foo) +static void init_once(void *data) { - struct bdev_inode *ei = (struct bdev_inode *) foo; - struct block_device *bdev = &ei->bdev; + struct bdev_inode *ei = data; - memset(bdev, 0, sizeof(*bdev)); - mutex_init(&bdev->bd_mutex); -#ifdef CONFIG_SYSFS - INIT_LIST_HEAD(&bdev->bd_holder_disks); -#endif - bdev->bd_bdi = &noop_backing_dev_info; inode_init_once(&ei->vfs_inode); - /* Initialize mutex for freeze. */ - mutex_init(&bdev->bd_fsfreeze_mutex); } static void bdev_evict_inode(struct inode *inode) @@ -873,12 +864,17 @@ struct block_device *bdev_alloc(struct gendisk *disk, u8 partno) mapping_set_gfp_mask(&inode->i_data, GFP_USER); bdev = I_BDEV(inode); + memset(bdev, 0, sizeof(*bdev)); + mutex_init(&bdev->bd_mutex); + mutex_init(&bdev->bd_fsfreeze_mutex); spin_lock_init(&bdev->bd_size_lock); bdev->bd_disk = disk; bdev->bd_partno = partno; - bdev->bd_super = NULL; bdev->bd_inode = inode; - bdev->bd_part_count = 0; + bdev->bd_bdi = &noop_backing_dev_info; +#ifdef CONFIG_SYSFS + INIT_LIST_HEAD(&bdev->bd_holder_disks); +#endif return bdev; }