From patchwork Tue Nov 24 13:27:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11928997 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=-16.6 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=unavailable 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 D3ADBC2D0E4 for ; Tue, 24 Nov 2020 13:40:26 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 623BA20782 for ; Tue, 24 Nov 2020 13:40:26 +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="jo7jitVZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 623BA20782 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.36130.67944 (Exim 4.92) (envelope-from ) id 1khYYL-0004Np-JI; Tue, 24 Nov 2020 13:40:17 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 36130.67944; Tue, 24 Nov 2020 13:40:17 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1khYYL-0004NI-4f; Tue, 24 Nov 2020 13:40:17 +0000 Received: by outflank-mailman (input) for mailman id 36130; Tue, 24 Nov 2020 13:40:14 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1khYP6-0000Qf-4b for xen-devel@lists.xenproject.org; Tue, 24 Nov 2020 13:30:44 +0000 Received: from casper.infradead.org (unknown [2001:8b0:10b:1236::1]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id ac69b391-4604-41e3-b476-dba3f133e5c8; Tue, 24 Nov 2020 13:28:56 +0000 (UTC) Received: from [2001:4bb8:180:5443:c70:4a89:bc61:3] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1khYN8-0006dt-TQ; Tue, 24 Nov 2020 13:28:43 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1khYP6-0000Qf-4b for xen-devel@lists.xenproject.org; Tue, 24 Nov 2020 13:30:44 +0000 X-Inumbo-ID: ac69b391-4604-41e3-b476-dba3f133e5c8 Received: from casper.infradead.org (unknown [2001:8b0:10b:1236::1]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id ac69b391-4604-41e3-b476-dba3f133e5c8; Tue, 24 Nov 2020 13:28:56 +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=s2bj0ka9tzVXa7iO1xuCgon+nWLgrfiF05EXz6Wq7iQ=; b=jo7jitVZLk7dE0nFi35W7LDPJN tFqdEul2zhhIuA5tOCbi5aycGTNvy8TrCwjvdqjWRV+CbsHXj1uHR9YGBIHpgX5k1OrWEEjG1OBGS 05uqltCoKW08gYj1Exy9DRh4S20GKqktTwAhDBgXdpa6tr3gbKlx7crJ/yMgRgYb5bj1t1DPrZcGR /hwdibm8NOcUYLKg0vLiJpGjPeRHco2g+1GJeSTgoyu6wnqw78bcOPXI+iGIr/LCTqUZw/z9tv92S lld+DSHqPLq7Hfkngg8JscAjZbW0u/H0x3XHbCsyaVQZAi5fsRHdRkbzm4rSxa6gS65lVwxUXtiGV AvXj9emg==; Received: from [2001:4bb8:180:5443:c70:4a89:bc61:3] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1khYN8-0006dt-TQ; Tue, 24 Nov 2020 13:28:43 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Tejun Heo , Josef Bacik , Konrad Rzeszutek Wilk , Coly Li , Mike Snitzer , Greg Kroah-Hartman , Jan Kara , Johannes Thumshirn , dm-devel@redhat.com, Richard Weinberger , Jan Kara , linux-block@vger.kernel.org, xen-devel@lists.xenproject.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: Tue, 24 Nov 2020 14:27:35 +0100 Message-Id: <20201124132751.3747337-30-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201124132751.3747337-1-hch@lst.de> References: <20201124132751.3747337-1-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 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 Acked-by: Tejun Heo --- 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 43a0fda982c879..1e5c6d0eb92677 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) @@ -872,12 +863,17 @@ struct block_device *bdev_alloc(struct gendisk *disk, u8 partno) inode->i_data.a_ops = &def_blk_aops; 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; }