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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9E615C05027 for ; Tue, 14 Feb 2023 07:07:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231947AbjBNHHv (ORCPT ); Tue, 14 Feb 2023 02:07:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50300 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231831AbjBNHH1 (ORCPT ); Tue, 14 Feb 2023 02:07:27 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CDDC01DBB2; Mon, 13 Feb 2023 23:07:04 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A5059B81A02; Tue, 14 Feb 2023 07:07:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BE3C6C433A4; Tue, 14 Feb 2023 07:06:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1676358421; bh=faSU9WIlOndHpDhDf2FIwcDy94fg1S+/xLr91iuYnFs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=haQ67CC9AnruMMdRvLTP3ur8+9rfxW3kiW8NLQWfr7tHyhY9ET6F9E7ucDtc5OPVR V8ui5J7DmGKI6YpM6s3RuN0BEgPp/zTnZ+REFssZ3oevvAO2c7PQH3bWcJIYTwl6cs FR7+2FEPOdGt0yqGNLg7UTWojyuUbyC3x4unOsqDhORgoeZEHgmKxt7X4ZupgDVwOU mP13mc/quC3FdnBlkNjpmbSYXWbt1fLOxPEeYCxsBPJ/xfixJfB/wjf9fYbs/Cw84m 8AJ+Mn6Ozye8bNGzZXJ/+FdFcGV0KgsLy9yuFiw/Lx8Rx6gYUvFHSq0SPX2bMnh6fI hq5rMOVOB+K9Q== From: Josh Poimboeuf To: linux-kernel@vger.kernel.org Cc: jgross@suse.com, richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, linux-alpha@vger.kernel.org, linux@armlinux.org.uk, linux-arm-kernel@lists.infradead.org, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, linux-csky@vger.kernel.org, linux-ia64@vger.kernel.org, chenhuacai@kernel.org, kernel@xen0n.name, loongarch@lists.linux.dev, f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, tsbogend@alpha.franken.de, linux-mips@vger.kernel.org, jiaxun.yang@flygoat.com, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, linuxppc-dev@lists.ozlabs.org, ysato@users.sourceforge.jp, dalias@libc.org, linux-sh@vger.kernel.org, davem@davemloft.net, sparclinux@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, chris@zankel.net, jcmvbkbc@gmail.com, linux-xtensa@linux-xtensa.org, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, paulmck@kernel.org Subject: [PATCH v2 07/24] loongarch/cpu: Make sure play_dead() doesn't return Date: Mon, 13 Feb 2023 23:05:41 -0800 Message-Id: <21245d687ffeda34dbcf04961a2df3724f04f7c8.1676358308.git.jpoimboe@kernel.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: References: MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org play_dead() doesn't return. Make that more explicit with a BUG(). BUG() is preferable to unreachable() because BUG() is a more explicit failure mode and avoids undefined behavior like falling off the edge of the function into whatever code happens to be next. Signed-off-by: Josh Poimboeuf --- arch/loongarch/kernel/smp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/loongarch/kernel/smp.c b/arch/loongarch/kernel/smp.c index 8c6e227cb29d..51f328169a7b 100644 --- a/arch/loongarch/kernel/smp.c +++ b/arch/loongarch/kernel/smp.c @@ -336,7 +336,7 @@ void play_dead(void) iocsr_write32(0xffffffff, LOONGARCH_IOCSR_IPI_CLEAR); init_fn(); - unreachable(); + BUG(); } #endif -- 2.39.1