From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753346AbcGSHYJ (ORCPT ); Tue, 19 Jul 2016 03:24:09 -0400 Received: from terminus.zytor.com ([198.137.202.10]:46122 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753242AbcGSHYF (ORCPT ); Tue, 19 Jul 2016 03:24:05 -0400 Date: Tue, 19 Jul 2016 00:23:22 -0700 From: tip-bot for Richard Cochran Message-ID: Cc: marc_gonzalez@sigmadesigns.com, linux@arm.linux.org.uk, tglx@linutronix.de, vgupta@synopsys.com, rcochran@linutronix.de, torvalds@linux-foundation.org, eric@anholt.net, daniel.lezcano@linaro.org, mingo@kernel.org, heiko@sntech.de, bigeasy@linutronix.de, balbi@ti.com, hpa@zytor.com, anna-maria@linutronix.de, linux-kernel@vger.kernel.org, peterz@infradead.org, viresh.kumar@linaro.org Reply-To: tglx@linutronix.de, linux@arm.linux.org.uk, marc_gonzalez@sigmadesigns.com, daniel.lezcano@linaro.org, rcochran@linutronix.de, torvalds@linux-foundation.org, eric@anholt.net, vgupta@synopsys.com, bigeasy@linutronix.de, heiko@sntech.de, mingo@kernel.org, balbi@ti.com, hpa@zytor.com, peterz@infradead.org, linux-kernel@vger.kernel.org, anna-maria@linutronix.de, viresh.kumar@linaro.org In-Reply-To: <20160713153336.881124821@linutronix.de> References: <20160713153336.881124821@linutronix.de> To: linux-tip-commits@vger.kernel.org Subject: [tip:smp/hotplug] arm/twd: Convert to hotplug state machine Git-Commit-ID: 26b8768868c090151aa8c337773d429e0d5ca727 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 26b8768868c090151aa8c337773d429e0d5ca727 Gitweb: http://git.kernel.org/tip/26b8768868c090151aa8c337773d429e0d5ca727 Author: Richard Cochran AuthorDate: Wed, 13 Jul 2016 17:16:51 +0000 Committer: Ingo Molnar CommitDate: Fri, 15 Jul 2016 10:40:28 +0200 arm/twd: Convert to hotplug state machine Install the callbacks via the state machine. The callbacks won't be invoked on already online CPUs. Signed-off-by: Richard Cochran Signed-off-by: Anna-Maria Gleixner Reviewed-by: Sebastian Andrzej Siewior Cc: Daniel Lezcano Cc: Eric Anholt Cc: Felipe Balbi Cc: Heiko Stuebner Cc: Linus Torvalds Cc: Marc Gonzalez Cc: Peter Zijlstra Cc: Russell King Cc: Thomas Gleixner Cc: Vineet Gupta Cc: Viresh Kumar Cc: linux-arm-kernel@lists.infradead.org Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20160713153336.881124821@linutronix.de Signed-off-by: Ingo Molnar --- arch/arm/kernel/smp_twd.c | 31 +++++++++++-------------------- include/linux/cpuhotplug.h | 1 + 2 files changed, 12 insertions(+), 20 deletions(-) diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c index b6ec65e..02d5e5e 100644 --- a/arch/arm/kernel/smp_twd.c +++ b/arch/arm/kernel/smp_twd.c @@ -310,24 +310,17 @@ static void twd_timer_setup(void) enable_percpu_irq(clk->irq, 0); } -static int twd_timer_cpu_notify(struct notifier_block *self, - unsigned long action, void *hcpu) +static int twd_timer_starting_cpu(unsigned int cpu) { - switch (action & ~CPU_TASKS_FROZEN) { - case CPU_STARTING: - twd_timer_setup(); - break; - case CPU_DYING: - twd_timer_stop(); - break; - } - - return NOTIFY_OK; + twd_timer_setup(); + return 0; } -static struct notifier_block twd_timer_cpu_nb = { - .notifier_call = twd_timer_cpu_notify, -}; +static int twd_timer_dying_cpu(unsigned int cpu) +{ + twd_timer_stop(); + return 0; +} static int __init twd_local_timer_common_register(struct device_node *np) { @@ -345,9 +338,9 @@ static int __init twd_local_timer_common_register(struct device_node *np) goto out_free; } - err = register_cpu_notifier(&twd_timer_cpu_nb); - if (err) - goto out_irq; + cpuhp_setup_state_nocalls(CPUHP_AP_ARM_TWD_STARTING, + "AP_ARM_TWD_STARTING", + twd_timer_starting_cpu, twd_timer_dying_cpu); twd_get_clock(np); if (!of_property_read_bool(np, "always-on")) @@ -365,8 +358,6 @@ static int __init twd_local_timer_common_register(struct device_node *np) return 0; -out_irq: - free_percpu_irq(twd_ppi, twd_evt); out_free: iounmap(twd_base); twd_base = NULL; diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h index 2057e64..ad48881 100644 --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h @@ -40,6 +40,7 @@ enum cpuhp_state { CPUHP_AP_ARM_L2X0_STARTING, CPUHP_AP_ARM_ARCH_TIMER_STARTING, CPUHP_AP_DUMMY_TIMER_STARTING, + CPUHP_AP_ARM_TWD_STARTING, CPUHP_AP_METAG_TIMER_STARTING, CPUHP_AP_QCOM_TIMER_STARTING, CPUHP_AP_MIPS_GIC_TIMER_STARTING,