From patchwork Fri Apr 14 23:44:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 13212159 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 53DF2C77B71 for ; Fri, 14 Apr 2023 23:48:55 +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:Date:MIME-Version:References:Subject:Cc :To:From:Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: List-Owner; bh=HMBm20g0XgSkbk4kQX70o7wSaa7ZMQFMQ4unHA7psQI=; b=I/MAX047IM0kp4 wWPt5U7/j4A63yagym42nacZHZb2zKf2/qrxsmDFqgjB6VX+ma2fTVSRGj7nUmN4LRfmT4YORGo3l IWl0I92xR1Ui/jJEoU9nmQVWeh2DDRRX9YgWM2BY11rq6zZjOTK6OUYbDEaZ964Am+IIl5V00YAOO HOTrZXydHr7sdhWnENBNT8Vy3CqJDMcR5qeL7AcCwrgBXhFyBhwNYVU+vdmpZ9lJh4sC3at3e1mwo qAgw20stwqo0xqO6e1k+1b6S0CYPX7LurqmXtg9hXEvt95qSpersarFA7MSK0SQ3UvwSoGxlPTFE6 kVARrdVnrLX1rbBgnNLQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pnT96-00An7i-0W; Fri, 14 Apr 2023 23:48:00 +0000 Received: from galois.linutronix.de ([2a0a:51c0:0:12e:550::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pnT68-00AkVS-1N; Fri, 14 Apr 2023 23:45:00 +0000 Message-ID: <20230414232310.754812729@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1681515894; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=R05iW7fNVcum8Q+mjf2E3yOsCRNZdrRM4MkZfsXKqKc=; b=aUiik8SryxpjaeRHuGDH1CVCPJrHdz4ToboDiBvyrgybp5D/pPkGbz7paiwVK8VODAE0fl SgTT+QXtuBbN0fpZxUWKztpQGU0bjPZSUW3fxyRe9IQVkvcbXWq/0x43vpjbVvOarJH7HV uIjYrrAOYGCrtSVeXL3Klmw/1hn994FxUZywCAJZ5ETy96ETN4uYpOv1uP93+BscjKqka+ yexDk6oAjmOIdMrSOugyHKVHXN1255/Us+8JjFFS+8Qfs8u4ygXpDFKFDNp8KDDwtuiQU3 N8RPw7aSRn8YI2NswkTZsr81vwh3F5+iNvqvFAUv07ki8YW+7xmZPHzCBoIC9w== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1681515894; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=R05iW7fNVcum8Q+mjf2E3yOsCRNZdrRM4MkZfsXKqKc=; b=caenbNdiUoGPpEuAuhFVb0nh5RPBSUL+B8V0qrD3LKpWvQp6oNtGy6pLTh0H4xLk3s7H+h 2RFNt+MohEqWQ1CQ== From: Thomas Gleixner To: LKML Cc: x86@kernel.org, David Woodhouse , Andrew Cooper , Brian Gerst , "Arjan van de Veen" , Paolo Bonzini , Paul McKenney , Tom Lendacky , Sean Christopherson , Oleksandr Natalenko , Paul Menzel , "Guilherme G. Piccoli" , Piotr Gorski , "James E.J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org, David Woodhouse , Usama Arif , Juergen Gross , Boris Ostrovsky , xen-devel@lists.xenproject.org, Russell King , Arnd Bergmann , linux-arm-kernel@lists.infradead.org, Catalin Marinas , Will Deacon , Guo Ren , linux-csky@vger.kernel.org, Thomas Bogendoerfer , linux-mips@vger.kernel.org, Paul Walmsley , Palmer Dabbelt , linux-riscv@lists.infradead.org, Mark Rutland , Sabin Rapan Subject: [patch 25/37] parisc: Switch to hotplug core state synchronization References: <20230414225551.858160935@linutronix.de> MIME-Version: 1.0 Date: Sat, 15 Apr 2023 01:44:54 +0200 (CEST) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230414_164456_710534_ADF3C794 X-CRM114-Status: GOOD ( 11.20 ) 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 Switch to the CPU hotplug core state tracking and synchronization mechanim. No functional change intended. Signed-off-by: Thomas Gleixner Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: linux-parisc@vger.kernel.org --- arch/parisc/Kconfig | 1 + arch/parisc/kernel/process.c | 4 ++-- arch/parisc/kernel/smp.c | 7 +++---- 3 files changed, 6 insertions(+), 6 deletions(-) --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -56,6 +56,7 @@ config PARISC select HAVE_ARCH_SECCOMP_FILTER select HAVE_ARCH_TRACEHOOK select HAVE_REGS_AND_STACK_ACCESS_API + select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU select GENERIC_SCHED_CLOCK select GENERIC_IRQ_MIGRATION if SMP select HAVE_UNSTABLE_SCHED_CLOCK if SMP --- a/arch/parisc/kernel/process.c +++ b/arch/parisc/kernel/process.c @@ -166,8 +166,8 @@ void arch_cpu_idle_dead(void) local_irq_disable(); - /* Tell __cpu_die() that this CPU is now safe to dispose of. */ - (void)cpu_report_death(); + /* Tell the core that this CPU is now safe to dispose of. */ + cpuhp_ap_report_dead(); /* Ensure that the cache lines are written out. */ flush_cache_all_local(); --- a/arch/parisc/kernel/smp.c +++ b/arch/parisc/kernel/smp.c @@ -500,11 +500,10 @@ int __cpu_disable(void) void __cpu_die(unsigned int cpu) { pdc_cpu_rendezvous_lock(); +} - if (!cpu_wait_death(cpu, 5)) { - pr_crit("CPU%u: cpu didn't die\n", cpu); - return; - } +void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu) +{ pr_info("CPU%u: is shutting down\n", cpu); /* set task's state to interruptible sleep */