From patchwork Mon Nov 16 02:48:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Chen Qun X-Patchwork-Id: 11907265 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 A1C451668 for ; Mon, 16 Nov 2020 02:54:53 +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 6D3FA22263 for ; Mon, 16 Nov 2020 02:54:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6D3FA22263 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]:54780 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1keUfM-0005dr-BV for patchwork-qemu-devel@patchwork.kernel.org; Sun, 15 Nov 2020 21:54:52 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:58560) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1keUZl-0006bk-TO; Sun, 15 Nov 2020 21:49:05 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:2348) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1keUZh-0002sX-Rd; Sun, 15 Nov 2020 21:49:05 -0500 Received: from DGGEMS408-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4CZD6H4YMkzkX2L; Mon, 16 Nov 2020 10:48:39 +0800 (CST) Received: from huawei.com (10.175.104.175) by DGGEMS408-HUB.china.huawei.com (10.3.19.208) with Microsoft SMTP Server id 14.3.487.0; Mon, 16 Nov 2020 10:48:48 +0800 From: Chen Qun To: , Subject: [PATCH v3 3/7] accel/tcg/user-exec: silence the compiler warnings Date: Mon, 16 Nov 2020 10:48:06 +0800 Message-ID: <20201116024810.2415819-4-kuhn.chenqun@huawei.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20201116024810.2415819-1-kuhn.chenqun@huawei.com> References: <20201116024810.2415819-1-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 = 2020/11/15 21:16:58 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=-0.01, RCVD_IN_MSPIKE_WL=-0.01, 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: Thomas Huth , zhang.zhanghailiang@huawei.com, Riku Voipio , Richard Henderson , =?utf-8?q?Philippe_Mathie?= =?utf-8?q?u-Daud=C3=A9?= , Paolo Bonzini , ganqixin@huawei.com, Euler Robot , Chen Qun Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" When using -Wimplicit-fallthrough in our CFLAGS on GCC9, the compiler showed warning: ../accel/tcg/user-exec.c: In function ‘handle_cpu_signal’: ../accel/tcg/user-exec.c:169:13: warning: this statement may fall through [-Wimplicit-fallthrough=] 169 | cpu_exit_tb_from_sighandler(cpu, old_set); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../accel/tcg/user-exec.c:172:9: note: here 172 | default: Mark the cpu_exit_tb_from_sighandler() function with QEMU_NORETURN to fix it. Reported-by: Euler Robot Signed-off-by: Chen Qun Reviewed-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Thomas Huth Reviewed-by: Alex Bennée --- v1->v2: Add QEMU_NORETURN to cpu_exit_tb_from_sighandler() function to avoid the compiler warnings(Base on Thomas's and Richard's comments). Cc: Thomas Huth Cc: Riku Voipio Cc: Richard Henderson Cc: Paolo Bonzini --- accel/tcg/user-exec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c index 4ebe25461a..293ee86ea4 100644 --- a/accel/tcg/user-exec.c +++ b/accel/tcg/user-exec.c @@ -49,7 +49,8 @@ __thread uintptr_t helper_retaddr; /* exit the current TB from a signal handler. The host registers are restored in a state compatible with the CPU emulator */ -static void cpu_exit_tb_from_sighandler(CPUState *cpu, sigset_t *old_set) +static void QEMU_NORETURN cpu_exit_tb_from_sighandler(CPUState *cpu, + sigset_t *old_set) { /* XXX: use siglongjmp ? */ sigprocmask(SIG_SETMASK, old_set, NULL);