From patchwork Wed Nov 11 14:21:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Chen Qun X-Patchwork-Id: 1398315 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; 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=huawei.com 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 ozlabs.org (Postfix) with ESMTPS id 4CWRp60wCFz9s1l for ; Thu, 12 Nov 2020 01:25:02 +1100 (AEDT) Received: from localhost ([::1]:39262 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kcr3U-0006uJ-1c for incoming@patchwork.ozlabs.org; Wed, 11 Nov 2020 09:25:00 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:34460) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kcr1W-0004Kf-KS; Wed, 11 Nov 2020 09:22:58 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:2413) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kcr1I-0000c1-Fz; Wed, 11 Nov 2020 09:22:58 -0500 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4CWRl33WM9z15TDv; Wed, 11 Nov 2020 22:22:23 +0800 (CST) Received: from huawei.com (10.175.104.175) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Wed, 11 Nov 2020 22:22:24 +0800 From: Chen Qun To: , Subject: [PATCH v2 1/5] hw/rdma/rdma_backend: fix uninitialized variable warning in rdma_poll_cq() Date: Wed, 11 Nov 2020 22:21:59 +0800 Message-ID: <20201111142203.2359370-2-kuhn.chenqun@huawei.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20201111142203.2359370-1-kuhn.chenqun@huawei.com> References: <20201111142203.2359370-1-kuhn.chenqun@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.104.175] X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.190; envelope-from=kuhn.chenqun@huawei.com; helo=szxga04-in.huawei.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/11 07:50:46 X-ACL-Warn: Detected OS = Linux 3.1-3.10 [fuzzy] X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: peter.maydell@linaro.org, ganqixin@huawei.com, zhang.zhanghailiang@huawei.com, Yuval Shaia , Euler Robot , Chen Qun Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" After the WITH_QEMU_LOCK_GUARD macro is added, the compiler cannot identify that the statements in the macro must be executed. As a result, some variables assignment statements in the macro may be considered as unexecuted by the compiler. When the -Wmaybe-uninitialized capability is enabled on GCC9,the compiler showed warning: hw/rdma/rdma_backend.c: In function ‘rdma_poll_cq’: hw/rdma/rdma_utils.h:25:5: warning: ‘ne’ may be used uninitialized in this function [-Wmaybe-uninitialized] 25 | error_report("%s: " fmt, "rdma", ## __VA_ARGS__) | ^~~~~~~~~~~~ hw/rdma/rdma_backend.c:93:12: note: ‘ne’ was declared here 93 | int i, ne, total_ne = 0; | ^~ Add a default value for 'ne' to prevented the warning. Reported-by: Euler Robot Signed-off-by: Chen Qun Reviewed-by: Marcel Apfelbaum Reviewed-by: Yuval Shaia --- Cc: Yuval Shaia Cc: Marcel Apfelbaum --- hw/rdma/rdma_backend.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/rdma/rdma_backend.c b/hw/rdma/rdma_backend.c index 5de010b1fa..2fe4a3501c 100644 --- a/hw/rdma/rdma_backend.c +++ b/hw/rdma/rdma_backend.c @@ -90,7 +90,7 @@ static void clean_recv_mads(RdmaBackendDev *backend_dev) static int rdma_poll_cq(RdmaDeviceResources *rdma_dev_res, struct ibv_cq *ibcq) { - int i, ne, total_ne = 0; + int i, ne = 0, total_ne = 0; BackendCtx *bctx; struct ibv_wc wc[2]; RdmaProtectedGSList *cqe_ctx_list;