From patchwork Mon May 8 19:44:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 13234969 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 C081EC7EE24 for ; Mon, 8 May 2023 19:46:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234066AbjEHTqt (ORCPT ); Mon, 8 May 2023 15:46:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58024 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233812AbjEHTqE (ORCPT ); Mon, 8 May 2023 15:46:04 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F062972A6; Mon, 8 May 2023 12:44:46 -0700 (PDT) Message-ID: <20230508185218.643400362@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1683575047; 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=hx5fWQqpBJqFhc3VD4cFl0lkC1fEFtezXeQ/kkMDuYM=; b=dMSiYiyMCD3/kfD6ycKkp08Cs2yGyR46ibmTbUZ4EPuuwnERkLqo1DPunwf9Bd+Lh282Kk iyz5crAqn34/Z1DU1FdeHq8w2ICxkwvwPupWSapQM5bKWcd06oqKMF65CPiBv3i5Jdq5GK No9UCLkO9a75FWDWNjS5cUfUlOLyZkVKjYuIut6Mde17+klVjF/vsV/x/8XZgC94CcLGgL esCNz6eRqlPWNCIMyIyPzBMIvNBVYenPTUQOWaJr4izZS/Q4K0oHTNZvGzzHj78cMSROKA 7adYzjGge8G4Bi2MTD6vyk5VOcXBsF4npN+FHo+bMYD6KtCMSa31T9g3imKuVQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1683575047; 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=hx5fWQqpBJqFhc3VD4cFl0lkC1fEFtezXeQ/kkMDuYM=; b=5H4Y1AwaHO6MuLieAAEsSuc7IElwyyxQTr8AXtmBcHORWW1C5BYTyvmgYBKAcPiBa35CdM lrZnB79si3SXI4BQ== 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 , 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, "James E.J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org, Paul Walmsley , Palmer Dabbelt , linux-riscv@lists.infradead.org, Mark Rutland , Sabin Rapan , "Michael Kelley (LINUX)" Subject: [patch v3 25/36] parisc: Switch to hotplug core state synchronization References: <20230508181633.089804905@linutronix.de> MIME-Version: 1.0 Date: Mon, 8 May 2023 21:44:07 +0200 (CEST) Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org From: Thomas Gleixner Switch to the CPU hotplug core state tracking and synchronization mechanim. No functional change intended. Signed-off-by: Thomas Gleixner Tested-by: Michael Kelley --- 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 @@ -57,6 +57,7 @@ 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 __noreturn 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 */