From patchwork Mon Mar 2 13:07:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen Qun X-Patchwork-Id: 11415525 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 72D9C92A for ; Mon, 2 Mar 2020 13:10:43 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 5413C21739 for ; Mon, 2 Mar 2020 13:10:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5413C21739 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:60828 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j8kqI-0003mn-IA for patchwork-qemu-devel@patchwork.kernel.org; Mon, 02 Mar 2020 08:10:42 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:48640) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j8kni-0006Ff-Fs for qemu-devel@nongnu.org; Mon, 02 Mar 2020 08:08:03 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j8knh-0003MN-By for qemu-devel@nongnu.org; Mon, 02 Mar 2020 08:08:02 -0500 Received: from szxga06-in.huawei.com ([45.249.212.32]:51536 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1j8kng-0003Ip-Vp; Mon, 02 Mar 2020 08:08:01 -0500 Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 30214E7C45B717FB405E; Mon, 2 Mar 2020 21:07:53 +0800 (CST) Received: from huawei.com (10.133.205.93) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.439.0; Mon, 2 Mar 2020 21:07:45 +0800 From: Chen Qun To: , Subject: [PATCH v3 01/12] block/stream: Remove redundant statement in stream_run() Date: Mon, 2 Mar 2020 21:07:04 +0800 Message-ID: <20200302130715.29440-3-kuhn.chenqun@huawei.com> X-Mailer: git-send-email 2.21.0.windows.1 In-Reply-To: <20200302130715.29440-1-kuhn.chenqun@huawei.com> References: <20200302130715.29440-1-kuhn.chenqun@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.133.205.93] X-CFilter-Loop: Reflected X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 45.249.212.32 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , peter.maydell@linaro.org, zhang.zhanghailiang@huawei.com, Max Reitz , Euler Robot , Chen Qun , John Snow Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Clang static code analyzer show warning: block/stream.c:186:9: warning: Value stored to 'ret' is never read ret = 0; ^ ~ Reported-by: Euler Robot Signed-off-by: Chen Qun Reviewed-by: John Snow Reviewed-by: Kevin Wolf --- Cc: John Snow Cc: Kevin Wolf Cc: Max Reitz v1->v2:move 'ret' declaration to the for() statement(Base on Kevin's comments). --- block/stream.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/block/stream.c b/block/stream.c index 5562ccbf57..aa2e7af98e 100644 --- a/block/stream.c +++ b/block/stream.c @@ -114,7 +114,6 @@ static int coroutine_fn stream_run(Job *job, Error **errp) int64_t offset = 0; uint64_t delay_ns = 0; int error = 0; - int ret = 0; int64_t n = 0; /* bytes */ if (bs == s->bottom) { @@ -139,6 +138,7 @@ static int coroutine_fn stream_run(Job *job, Error **errp) for ( ; offset < len; offset += n) { bool copy; + int ret; /* Note that even when no rate limit is applied we need to yield * with no pending I/O here so that bdrv_drain_all() returns. @@ -183,7 +183,6 @@ static int coroutine_fn stream_run(Job *job, Error **errp) break; } } - ret = 0; /* Publish progress */ job_progress_update(&s->common.job, n);