From patchwork Mon Feb 13 14:30:29 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Sterba X-Patchwork-Id: 9569851 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 451FF60442 for ; Mon, 13 Feb 2017 14:31:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2E65226212 for ; Mon, 13 Feb 2017 14:31:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2338327EED; Mon, 13 Feb 2017 14:31:10 +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 E541C26212 for ; Mon, 13 Feb 2017 14:31:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753281AbdBMObF (ORCPT ); Mon, 13 Feb 2017 09:31:05 -0500 Received: from mx2.suse.de ([195.135.220.15]:40416 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751472AbdBMObE (ORCPT ); Mon, 13 Feb 2017 09:31:04 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 3DE75AD55 for ; Mon, 13 Feb 2017 14:30:58 +0000 (UTC) Received: by ds.suse.cz (Postfix, from userid 10065) id 80F92DA93A; Mon, 13 Feb 2017 15:30:29 +0100 (CET) From: David Sterba To: linux-btrfs@vger.kernel.org Cc: David Sterba Subject: [PATCH 7/7] btrfs: remove pointless rcu protection from btrfs_qgroup_inherit Date: Mon, 13 Feb 2017 15:30:29 +0100 Message-Id: <72c4fd2f87eca0bc49f3292ce07856cff41536e8.1486995885.git.dsterba@suse.com> X-Mailer: git-send-email 2.10.1 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 There was never need for RCU protection around reading nodesize or other fairly constant filesystem data. Signed-off-by: David Sterba --- fs/btrfs/qgroup.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index 114d6770dc23..052f1410dc14 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -2189,9 +2189,7 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, goto out; } - rcu_read_lock(); level_size = fs_info->nodesize; - rcu_read_unlock(); } /*