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: 58205 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp466198wrn; Thu, 16 Feb 2023 10:42:49 -0800 (PST) X-Google-Smtp-Source: AK7set85XjxG9Of91c3TCqDKp1jMfk5ebIsigtC0MHe6Wg7L70uMG4mbUwk6+md1wgb/xsQHHv+e X-Received: by 2002:a17:906:4714:b0:8b1:2f0e:e3a4 with SMTP id y20-20020a170906471400b008b12f0ee3a4mr7371537ejq.26.1676572969474; Thu, 16 Feb 2023 10:42:49 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1676572969; cv=none; d=google.com; s=arc-20160816; b=xnyc1Ub9SF9vmoMtYkEi4js7GQaqssqNSjD+lJR7Xhb+0PmGD4P66w5XIpXceiOTyY nIu/CzgXMRbgYeChBUa8Cw7zeRsT6+v2T66ggaloxioy0Vi2lYFkY3IYoj1oB0Y3BPlx ZQGSLY/SBJI9yfRniv4MYs0VHIBXq8xdP4jRhq9TyCChKGOBjgS0ajDcY9YePfVaryrC 423EzSd0by50e32xN2jdczHTTzo5Tq60Fnfu3y4ylk3ptFqyIP5bpePooh6YfGvvEKDr CPYqwkuQWpNWg/3N9WRPjaXQVCSgSpx+Z9souPbmDvd48ghM55MHA5w/Ig+qga9wPI5E m48Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=r9SHDZIbnDLKtZTIKh7ZTBZAKXxJelXFjqg0P/hsBQQ=; b=ZHXpib7dmJ+8Vf93PI9QqWjFTQjSV2rvd5GaT7AsIx6ugzTeG5VuTotZnY7wx9csSi 6Vz9vPO4TkBdg+yd4B3zPkafYKcmJ8XMgFBbDr+e8SVYwSSCrKhMPEAeoY8tCtBDmm5/ H7mQlsomQU/mIVJOa2bOgMZ3dLHYqy6D9nMZU99ZWT6q3ndz/T1ejIPXTDU89++W6/gx 9U2EDjnexEPmj8gTZyCzYVDt/heFeZ6e6pCh0gSz74Ot174wCA/GAE75oVKJXWI35o8A 4MzUUl+TTir3p47OhdSXPzAhOOtdlOUiODZNsaxE3ELnpjBGAPoSnXq6Z5iISBw8V2Di eh6A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=pzcnRjPV; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id fi22-20020a1709073ad600b0089107ef0e9csi2290549ejc.526.2023.02.16.10.42.14; Thu, 16 Feb 2023 10:42:49 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=pzcnRjPV; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230029AbjBPSjB (ORCPT + 99 others); Thu, 16 Feb 2023 13:39:01 -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: X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1758014177786316402?= X-GMAIL-MSGID: =?utf-8?q?1758014177786316402?= 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 */