From patchwork Fri Feb 3 22:05:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josh Poimboeuf X-Patchwork-Id: 52687 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp1080759wrn; Fri, 3 Feb 2023 14:09:22 -0800 (PST) X-Google-Smtp-Source: AK7set/2sh+MemZZOu/Wa+aRTm58/GDJFzl7gjLbJSJKgBjGq/NjYH9aOgx+a7PvelVmIrwW2BGn X-Received: by 2002:a05:6a21:6d8e:b0:ad:def6:af3 with SMTP id wl14-20020a056a216d8e00b000addef60af3mr14410211pzb.57.1675462161898; Fri, 03 Feb 2023 14:09:21 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1675462161; cv=none; d=google.com; s=arc-20160816; b=woHqIn1iDoYMHx3R3RZMisftpbPu+eE/nriBvCdjKaxy8443QeW28RkAKAJYw2lxsZ AY+k0lW+bnED5zDK3SoqTym6LXmdo836Wopfsli3RmycnpsbGdflYc+Y+PudgVxPpzhL GM0El8o7aNEELFyu1jxdcuQ9REifz/pT557jlbZIDQpt2jcuYsYu8u23kwK2DNtMlSEL acMNsqhiXyENw3KnWN4kBW2YdPWr6B2LYfEdDy/Fi7hCJhI7yacg/e9qwfzWDmuRbu4T YynAqgA/8WoCkeKyMnFN888+R/O1T8OZ6r03wRJm8wZL0ZYlU0tOgjaJZPJ+q4GVB4mp qpSQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=KG6T9xBp4bpsefzY8iY0vQjJmZWfUaqQ9y2TqW+607Q=; b=ZVJr7RkLM2vjN9xoKDkm6dPt7ldn+Z7lgnhDL/Z/ft/uPTZv3/wZC2+LLd1a2qcU// TFP3AiunheRvy9ueue5TklrGGcNQDcliqruRMbiGtBv+UKU+j7SKMm8VTnVdv3apYxDT GvG/UhGwb6O4I6oHdThEdTy2fHHtzMHebXQrU6UWEP6lW7oVVI0uWHtg4RRzeWuj075O qCHHW0RQFD02O7LsVkqLzb29+TKLt0UEQWXduAWivkB1OpvrmqQbPVOoqKT3E5hIgC0t Om9y3mmnu7hhd5h4NK6UkpYNeh0Rw0e6qQrXG2S9t7VBJC28foAr0LGwOd8pf9K40Lxd aNUg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=mzBDKmAx; 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 t30-20020a63b25e000000b004cf0cc0dc35si3817132pgo.874.2023.02.03.14.09.09; Fri, 03 Feb 2023 14:09:21 -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=mzBDKmAx; 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 S232931AbjBCWI5 (ORCPT + 99 others); Fri, 3 Feb 2023 17:08:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58186 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232978AbjBCWIJ (ORCPT ); Fri, 3 Feb 2023 17:08:09 -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 53F96A77BC; Fri, 3 Feb 2023 14:06:32 -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 33CE562033; Fri, 3 Feb 2023 22:06:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DBA2EC433D2; Fri, 3 Feb 2023 22:06:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1675461980; bh=cvjRNwH2kRiWR8c5UNqBmClynEmYqcho7035VrMra1c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mzBDKmAx5z+R9uqapSiL6Cn1VpVHH7drD5XxGu9fuiYmqLWPLl1KOVTTd69GQOZd5 ARPsyjFCWJ2cab/VUgVf5aLu2kjehWHFLflwHnpV4ETtShxVzGqPJj3jYZnAXjZ6vZ ILdvD+LHRKRK52SNwHW1v5UeCOq0Mb/aTdvnASi6K9qK4VC6gz7+t8xuKUqURMG9ry A57A0tZJ6+ElGZjnAGmS3t0NQQ386BYUrN/eXS2nP/L90dcie8kCbHpV4WPfJtZW6M Rqh4LPiEGX0Wb2TD086V1ccTZQJggpkhl/Zc5pAPnq0twHUFHirhVfRcjsHHRHfB30 nNVhfg+wbZp4A== 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 21/22] sched/idle: Make sure weak version of arch_cpu_idle_dead() doesn't return Date: Fri, 3 Feb 2023 14:05:30 -0800 Message-Id: <52f887a01f8ee38fb710c915c1a3205983563736.1675461757.git.jpoimboe@kernel.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: References: MIME-Version: 1.0 Content-type: text/plain 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?1756849411894357087?= X-GMAIL-MSGID: =?utf-8?q?1756849411894357087?= arch_cpu_idle_dead() should never return. Make it so. Signed-off-by: Josh Poimboeuf --- kernel/sched/idle.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index e9ef66be2870..56e152f06d0f 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -75,7 +75,7 @@ static noinline int __cpuidle cpu_idle_poll(void) void __weak arch_cpu_idle_prepare(void) { } void __weak arch_cpu_idle_enter(void) { } void __weak arch_cpu_idle_exit(void) { } -void __weak arch_cpu_idle_dead(void) { } +void __weak arch_cpu_idle_dead(void) { while (1); } void __weak arch_cpu_idle(void) { cpu_idle_force_poll = 1;