From patchwork Mon Jun 12 15:29:36 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Sterba X-Patchwork-Id: 9782475 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A5D3960352 for ; Mon, 12 Jun 2017 17:17:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8C4F12847B for ; Mon, 12 Jun 2017 17:17:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7F18228501; Mon, 12 Jun 2017 17:17:40 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0691F2847B for ; Mon, 12 Jun 2017 17:17:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753447AbdFLRRc (ORCPT ); Mon, 12 Jun 2017 13:17:32 -0400 Received: from mx2.suse.de ([195.135.220.15]:33081 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753443AbdFLPaq (ORCPT ); Mon, 12 Jun 2017 11:30:46 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 9FD8CAD06 for ; Mon, 12 Jun 2017 15:30:40 +0000 (UTC) Received: by ds.suse.cz (Postfix, from userid 10065) id DBCDCDA9C0; Mon, 12 Jun 2017 17:29:36 +0200 (CEST) From: David Sterba To: linux-btrfs@vger.kernel.org Cc: David Sterba Subject: [PATCH 1/3] btrfs: document mandatory order of bio in btrfs_io_bio Date: Mon, 12 Jun 2017 17:29:36 +0200 Message-Id: X-Mailer: git-send-email 2.13.0 In-Reply-To: References: Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: David Sterba --- fs/btrfs/volumes.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 58b97b6f5f02..35327efecdbb 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -281,6 +281,10 @@ struct btrfs_io_bio { u8 *csum_allocated; btrfs_io_bio_end_io_t *end_io; struct bvec_iter iter; + /* + * This member must come last, bio_alloc_bioset will allocate enough + * bytes for entire btrfs_io_bio but relies on bio being last. + */ struct bio bio; };