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s390/mm/pfault: Convert to hotplug state machine
Install the callbacks via the state machine. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: linux-s390@vger.kernel.org Cc: Peter Zijlstra <peterz@infradead.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: rt@linutronix.de Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Link: http://lkml.kernel.org/r/20160906170457.32393-18-bigeasy@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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parent
e476d31291
commit
84c9ceefec
2 changed files with 13 additions and 18 deletions
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@ -740,28 +740,21 @@ static void pfault_interrupt(struct ext_code ext_code,
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put_task_struct(tsk);
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}
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static int pfault_cpu_notify(struct notifier_block *self, unsigned long action,
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void *hcpu)
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static int pfault_cpu_dead(unsigned int cpu)
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{
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struct thread_struct *thread, *next;
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struct task_struct *tsk;
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switch (action & ~CPU_TASKS_FROZEN) {
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case CPU_DEAD:
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spin_lock_irq(&pfault_lock);
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list_for_each_entry_safe(thread, next, &pfault_list, list) {
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thread->pfault_wait = 0;
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list_del(&thread->list);
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tsk = container_of(thread, struct task_struct, thread);
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wake_up_process(tsk);
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put_task_struct(tsk);
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}
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spin_unlock_irq(&pfault_lock);
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break;
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default:
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break;
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spin_lock_irq(&pfault_lock);
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list_for_each_entry_safe(thread, next, &pfault_list, list) {
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thread->pfault_wait = 0;
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list_del(&thread->list);
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tsk = container_of(thread, struct task_struct, thread);
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wake_up_process(tsk);
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put_task_struct(tsk);
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}
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return NOTIFY_OK;
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spin_unlock_irq(&pfault_lock);
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return 0;
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}
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static int __init pfault_irq_init(void)
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@ -775,7 +768,8 @@ static int __init pfault_irq_init(void)
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if (rc)
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goto out_pfault;
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irq_subclass_register(IRQ_SUBCLASS_SERVICE_SIGNAL);
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hotcpu_notifier(pfault_cpu_notify, 0);
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cpuhp_setup_state_nocalls(CPUHP_S390_PFAULT_DEAD, "s390/pfault:dead",
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NULL, pfault_cpu_dead);
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return 0;
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out_pfault:
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@ -26,6 +26,7 @@ enum cpuhp_state {
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CPUHP_BLOCK_SOFTIRQ_DEAD,
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CPUHP_VIRT_SCSI_DEAD,
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CPUHP_ACPI_CPUDRV_DEAD,
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CPUHP_S390_PFAULT_DEAD,
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CPUHP_WORKQUEUE_PREP,
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CPUHP_POWER_NUMA_PREPARE,
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CPUHP_HRTIMERS_PREPARE,
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