From patchwork Fri Apr 29 09:43:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen Zhongjin X-Patchwork-Id: 12831696 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4A2BFC4332F for ; Fri, 29 Apr 2022 09:57:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=AWEZNiL2qcwAPR7UrBP1ZG4PdAgdYD/gykAICIpasrw=; b=Kh7lhZNJhJHXuC xoBLxiq1EgJneQ31MsQu5OJR4zOIiNUp3EsmZVu9IYomTe0tvKcsKvi82wTwPubzV53U/TCCKumHL 8pWra291InX+hpciX2W3dJDx+AfUK/TtDJ5Obb0qhNwu7O/Cy+Bp5rofebr9d/64BR7l9EIaCxY6+ bWh8EZ5A9mebie4FMa0ATlW5jOLOcHOg5IxhDJgcXZWmsOJ94gq6/w6lFs7B9ocJP6AiqOodVLCYD F3RrGsq5txET0TncM09eLxlobJulVXk9nnXDQydvgFrBvTuBxxFaGHjUgNWiqSPtMVVOHnbrR9wUM cqIv52ZqbcdPoAAtYcnQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nkNLw-00AYKr-HA; Fri, 29 Apr 2022 09:55:57 +0000 Received: from szxga02-in.huawei.com ([45.249.212.188]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nkNBt-00ATYv-Bu for linux-arm-kernel@lists.infradead.org; Fri, 29 Apr 2022 09:45:37 +0000 Received: from dggpemm500024.china.huawei.com (unknown [172.30.72.55]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4KqSG4727QzGpWk; Fri, 29 Apr 2022 17:42:52 +0800 (CST) Received: from dggpemm500013.china.huawei.com (7.185.36.172) by dggpemm500024.china.huawei.com (7.185.36.203) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Fri, 29 Apr 2022 17:45:12 +0800 Received: from ubuntu1804.huawei.com (10.67.175.36) by dggpemm500013.china.huawei.com (7.185.36.172) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Fri, 29 Apr 2022 17:45:12 +0800 From: Chen Zhongjin To: , , CC: , , , , , , , , , , , , , , Subject: [RFC PATCH v4 17/37] arm64: bug: Add reachable annotation to warning macros Date: Fri, 29 Apr 2022 17:43:35 +0800 Message-ID: <20220429094355.122389-18-chenzhongjin@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220429094355.122389-1-chenzhongjin@huawei.com> References: <20220429094355.122389-1-chenzhongjin@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.175.36] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggpemm500013.china.huawei.com (7.185.36.172) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220429_024533_662603_087C29B1 X-CRM114-Status: UNSURE ( 9.36 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Julien Thierry WARN* and BUG* both use brk #0x800 opcodes and the distinction is provided by the contents of the bug table. This table is not accessible to objtool, so add an annotation to WARN* macros to let objtool know that brk handler will return an resume the execution of the instructions following the WARN's brk. Signed-off-by: Julien Thierry --- arch/arm64/include/asm/bug.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/bug.h b/arch/arm64/include/asm/bug.h index 28be048db3f6..9917429971d4 100644 --- a/arch/arm64/include/asm/bug.h +++ b/arch/arm64/include/asm/bug.h @@ -19,7 +19,11 @@ unreachable(); \ } while (0) -#define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags)) +#define __WARN_FLAGS(flags) \ +do { \ + __BUG_FLAGS(BUGFLAG_WARNING|(flags)); \ + annotate_reachable(); \ +} while (0) #define HAVE_ARCH_BUG