From patchwork Sun Aug 19 09:13:26 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Emilio Cota X-Patchwork-Id: 959294 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=braap.org Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=braap.org header.i=@braap.org header.b="XV6K/fll"; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.b="vQ0MEohr"; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 41tWV82cckz9s7c for ; Sun, 19 Aug 2018 19:14:39 +1000 (AEST) Received: from localhost ([::1]:42125 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1frJnB-0002O0-2W for incoming@patchwork.ozlabs.org; Sun, 19 Aug 2018 05:14:37 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57167) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1frJmS-0002N4-83 for qemu-devel@nongnu.org; Sun, 19 Aug 2018 05:13:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1frJmO-0000cs-TP for qemu-devel@nongnu.org; Sun, 19 Aug 2018 05:13:52 -0400 Received: from out1-smtp.messagingengine.com ([66.111.4.25]:36535) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1frJmO-0000c7-MV; Sun, 19 Aug 2018 05:13:48 -0400 Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailout.nyi.internal (Postfix) with ESMTP id 2E60821B01; Sun, 19 Aug 2018 05:13:48 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute4.internal (MEProxy); Sun, 19 Aug 2018 05:13:48 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=braap.org; h=cc :date:from:in-reply-to:message-id:references:subject:to :x-me-sender:x-me-sender:x-sasl-enc; s=mesmtp; bh=8gNvhbWW83SstK R15cwlZeTlWyzZ8QjeFrYICahEEck=; b=XV6K/flliLRunEELUqdzB/PXu1gumM wI+nUE/b4DUxoP/e/XU5OWnd7YEicvQDyeiYLMoKyHKur1mKuUbTe8E3xMT69FQ5 1PakmlPWIuJ5aqbHcYPIdvrV9X/DpC0nplWtbr2uGinmZPfpJLT6g0vgrzI1++uw 0OsjH/tbER3wg= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:date:from:in-reply-to:message-id :references:subject:to:x-me-sender:x-me-sender:x-sasl-enc; s= fm3; bh=8gNvhbWW83SstKR15cwlZeTlWyzZ8QjeFrYICahEEck=; b=vQ0MEohr hE2TbvhBxM25ZOVt39vmbhBksd/2R+3RYlcjFASwQl3JhbhZqCpkdzKZ5KdP9056 PyVIWTu8Qr5Ok/ZJslpapt9/czGlYmF3wLgEslLil+AfyCkmfBv5bCuPqCR+rDx3 PecB/dCaLfYO3n/Syiz9xKDsADRLh7d2A2tQ6a2GMn0Pm9qEElUKNS98YxfNfoaf ODwTA8wF3mQfrk2pZFqOBVNZbE/RoeMO5eD4jJ1+XWQf9E4x+4ByPQ5WsBXWS72V ExPehg4ID/ZQVmwanrzwTiSsVMzcVry9jugcEz72qEbMIM7MDXopRugFMGJlmWqF O6zRXMC8CNOFmA== X-ME-Proxy: X-ME-Sender: Received: from localhost (flamenco.cs.columbia.edu [128.59.20.216]) by mail.messagingengine.com (Postfix) with ESMTPA id 40CB510288; Sun, 19 Aug 2018 05:13:46 -0400 (EDT) From: "Emilio G. Cota" To: qemu-devel@nongnu.org Date: Sun, 19 Aug 2018 05:13:26 -0400 Message-Id: <20180819091335.22863-3-cota@braap.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180819091335.22863-1-cota@braap.org> References: <20180819091335.22863-1-cota@braap.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 66.111.4.25 Subject: [Qemu-devel] [PATCH v2 02/11] rcu_queue: remove barrier from QLIST_EMPTY_RCU X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Crosthwaite , Riku Voipio , Alexander Graf , Laurent Vivier , qemu-ppc@nongnu.org, Paolo Bonzini , David Gibson , Richard Henderson Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" It's unnecessary because the pointer isn't dereferenced. Signed-off-by: Emilio G. Cota --- include/qemu/rcu_queue.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/qemu/rcu_queue.h b/include/qemu/rcu_queue.h index dd7b3be043..6881ea5274 100644 --- a/include/qemu/rcu_queue.h +++ b/include/qemu/rcu_queue.h @@ -36,7 +36,7 @@ extern "C" { /* * List access methods. */ -#define QLIST_EMPTY_RCU(head) (atomic_rcu_read(&(head)->lh_first) == NULL) +#define QLIST_EMPTY_RCU(head) (atomic_read(&(head)->lh_first) == NULL) #define QLIST_FIRST_RCU(head) (atomic_rcu_read(&(head)->lh_first)) #define QLIST_NEXT_RCU(elm, field) (atomic_rcu_read(&(elm)->field.le_next))