From patchwork Thu Feb 16 18:38:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josh Poimboeuf X-Patchwork-Id: 13143670 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 A1E42C6379F for ; Thu, 16 Feb 2023 18:39:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229731AbjBPSjA (ORCPT ); Thu, 16 Feb 2023 13:39:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229786AbjBPSi6 (ORCPT ); Thu, 16 Feb 2023 13:38:58 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 160D350AC0; Thu, 16 Feb 2023 10:38:56 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 95A6862077; Thu, 16 Feb 2023 18:38:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 56CB1C433A1; Thu, 16 Feb 2023 18:38:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1676572735; bh=hl1r8WrgBVR11XLM9TAiwDCXOTiVcQCDtFTYvOcE4vk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=pzcnRjPVAqaK3xKlZe1yzpskS9/WG+OMTloaSFKzBMCxOCkoRpNuoRNYa/3zPKJnz 6X0jJD8EJrjs7EW5Q3nhsFDWki1qsGGw5El1PvFSJCXlOCmUN+Sd3mN6zTUEUZzc4/ mNsCR3739yEFXFsyMHHJMQQvHiwVXyBZTBiMAN1UkqOhmnVWUd9WCzEFvocuiDiV1c Eo7Y6nPnKYPTibCQ+j4JWOC/6OWWtqMh3gcXtNFiAG9L8vY3DcfS2b9I9DQMeEJSOl hm19TO6FpEAODpm1nGfmYEAKY8rl2vEswAXObCCmDbCHiycLI4GP13uQYuypXaWSs7 6xGJABLDdsOig== Date: Thu, 16 Feb 2023 10:38:51 -0800 From: Josh Poimboeuf To: "Russell King (Oracle)" Cc: linux-kernel@vger.kernel.org, jgross@suse.com, richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, linux-alpha@vger.kernel.org, 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 v2.1 03/24] arm/cpu: Add unreachable() to arch_cpu_idle_dead() Message-ID: <20230216183851.s5bnvniomq44rytu@treble> References: <20230214183926.46trlpdror3v5sk5@treble> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org arch_cpu_idle_dead() doesn't return. Make that visible to the compiler with an unreachable() code annotation. Signed-off-by: Josh Poimboeuf --- arch/arm/kernel/smp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 0b8c25763adc..441ea5cff390 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -382,6 +382,8 @@ void arch_cpu_idle_dead(void) : "r" (task_stack_page(current) + THREAD_SIZE - 8), "r" (current) : "r0"); + + unreachable(); } #endif /* CONFIG_HOTPLUG_CPU */