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irqchip/bcm2836: Convert to hotplug state machine

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Install the callbacks via the state machine.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153333.416260485@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Sebastian Andrzej Siewior 2016-07-13 17:16:07 +00:00 committed by Ingo Molnar
parent cb5ff2d245
commit 7ca04bc277
2 changed files with 14 additions and 21 deletions
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34
drivers/irqchip/irq-bcm2836.c
View File

@ -202,26 +202,19 @@ static void bcm2836_arm_irqchip_send_ipi(const struct cpumask *mask,
}
}
/* Unmasks the IPI on the CPU when it's online. */
static int bcm2836_arm_irqchip_cpu_notify(struct notifier_block *nfb,
unsigned long action, void *hcpu)
static int bcm2836_cpu_starting(unsigned int cpu)
{
unsigned int cpu = (unsigned long)hcpu;
unsigned int int_reg = LOCAL_MAILBOX_INT_CONTROL0;
unsigned int mailbox = 0;
if (action == CPU_STARTING || action == CPU_STARTING_FROZEN)
bcm2836_arm_irqchip_unmask_per_cpu_irq(int_reg, mailbox, cpu);
else if (action == CPU_DYING)
bcm2836_arm_irqchip_mask_per_cpu_irq(int_reg, mailbox, cpu);
return NOTIFY_OK;
bcm2836_arm_irqchip_unmask_per_cpu_irq(LOCAL_MAILBOX_INT_CONTROL0, 0,
cpu);
return 0;
}
static struct notifier_block bcm2836_arm_irqchip_cpu_notifier = {
.notifier_call = bcm2836_arm_irqchip_cpu_notify,
.priority = 100,
};
static int bcm2836_cpu_dying(unsigned int cpu)
{
bcm2836_arm_irqchip_mask_per_cpu_irq(LOCAL_MAILBOX_INT_CONTROL0, 0,
cpu);
return 0;
}
#ifdef CONFIG_ARM
int __init bcm2836_smp_boot_secondary(unsigned int cpu,
@ -251,10 +244,9 @@ bcm2836_arm_irqchip_smp_init(void)
{
#ifdef CONFIG_SMP
/* Unmask IPIs to the boot CPU. */
bcm2836_arm_irqchip_cpu_notify(&bcm2836_arm_irqchip_cpu_notifier,
CPU_STARTING,
(void *)(uintptr_t)smp_processor_id());
register_cpu_notifier(&bcm2836_arm_irqchip_cpu_notifier);
cpuhp_setup_state(CPUHP_AP_IRQ_BCM2836_STARTING,
"AP_IRQ_BCM2836_STARTING", bcm2836_cpu_starting,
bcm2836_cpu_dying);
set_smp_cross_call(bcm2836_arm_irqchip_send_ipi);

1
include/linux/cpuhotplug.h
View File

@ -14,6 +14,7 @@ enum cpuhp_state {
CPUHP_AP_IRQ_HIP04_STARTING,
CPUHP_AP_IRQ_ARMADA_XP_STARTING,
CPUHP_AP_IRQ_ARMADA_CASC_STARTING,
CPUHP_AP_IRQ_BCM2836_STARTING,
CPUHP_AP_NOTIFY_STARTING,
CPUHP_AP_ONLINE,
CPUHP_TEARDOWN_CPU,