From patchwork Tue Mar 22 19:36:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 8644761 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 6305DC0553 for ; Tue, 22 Mar 2016 19:38:33 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 942CE20212 for ; Tue, 22 Mar 2016 19:38:32 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D5F2820204 for ; Tue, 22 Mar 2016 19:38:31 +0000 (UTC) Received: from localhost ([::1]:39240 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aiS8N-0003Zq-9t for patchwork-qemu-devel@patchwork.kernel.org; Tue, 22 Mar 2016 15:38:31 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38378) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aiS6p-0000rQ-4T for qemu-devel@nongnu.org; Tue, 22 Mar 2016 15:36:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aiS6o-0003DE-7K for qemu-devel@nongnu.org; Tue, 22 Mar 2016 15:36:55 -0400 Received: from mx1.redhat.com ([209.132.183.28]:37658) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aiS6k-0003BJ-Gx; Tue, 22 Mar 2016 15:36:50 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (Postfix) with ESMTPS id EE7EFC01B3C6; Tue, 22 Mar 2016 19:36:49 +0000 (UTC) Received: from noname.redhat.com (ovpn-116-53.ams2.redhat.com [10.36.116.53]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u2MJadsf002983; Tue, 22 Mar 2016 15:36:48 -0400 From: Kevin Wolf To: qemu-block@nongnu.org Date: Tue, 22 Mar 2016 20:36:34 +0100 Message-Id: <1458675397-24956-7-git-send-email-kwolf@redhat.com> In-Reply-To: <1458675397-24956-1-git-send-email-kwolf@redhat.com> References: <1458675397-24956-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: kwolf@redhat.com, qemu-devel@nongnu.org, mreitz@redhat.com Subject: [Qemu-devel] [PATCH 6/9] block: Remove bdrv_move_feature_fields() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP bdrv_move_feature_fields() and swap_feature_fields() are empty now, they can be removed. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- block.c | 30 ------------------------------ 1 file changed, 30 deletions(-) diff --git a/block.c b/block.c index 66f918e..3770fb0 100644 --- a/block.c +++ b/block.c @@ -2222,13 +2222,6 @@ void bdrv_close_all(void) } } -/* Fields that need to stay with the top-level BDS */ -static void bdrv_move_feature_fields(BlockDriverState *bs_dest, - BlockDriverState *bs_src) -{ - /* move some fields that need to stay attached to the device */ -} - static void change_parent_backing_link(BlockDriverState *from, BlockDriverState *to) { @@ -2252,16 +2245,6 @@ static void change_parent_backing_link(BlockDriverState *from, } } -static void swap_feature_fields(BlockDriverState *bs_top, - BlockDriverState *bs_new) -{ - BlockDriverState tmp; - - bdrv_move_feature_fields(&tmp, bs_top); - bdrv_move_feature_fields(bs_top, bs_new); - bdrv_move_feature_fields(bs_new, &tmp); -} - /* * Add new bs contents at the top of an image chain while the chain is * live, while keeping required fields on the top layer. @@ -2285,9 +2268,6 @@ void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top) bdrv_ref(bs_top); - /* Some fields always stay on top of the backing file chain */ - swap_feature_fields(bs_top, bs_new); - change_parent_backing_link(bs_top, bs_new); bdrv_set_backing_hd(bs_new, bs_top); bdrv_unref(bs_top); @@ -2304,16 +2284,6 @@ void bdrv_replace_in_backing_chain(BlockDriverState *old, BlockDriverState *new) bdrv_ref(old); - if (old->blk) { - /* As long as these fields aren't in BlockBackend, but in the top-level - * BlockDriverState, it's not possible for a BDS to have two BBs. - * - * We really want to copy the fields from old to new, but we go for a - * swap instead so that pointers aren't duplicated and cause trouble. - * (Also, bdrv_swap() used to do the same.) */ - assert(!new->blk); - swap_feature_fields(old, new); - } change_parent_backing_link(old, new); /* Change backing files if a previously independent node is added to the