diff options
Diffstat (limited to 'arch/arm/kernel/irq.c')
| -rw-r--r-- | arch/arm/kernel/irq.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c index 3284118f356..d7099dbbb87 100644 --- a/arch/arm/kernel/irq.c +++ b/arch/arm/kernel/irq.c @@ -264,6 +264,7 @@ unlock: #endif #ifdef CONFIG_SMP show_ipi_list(p); + show_local_irqs(p); #endif seq_printf(p, "Err: %10lu\n", irq_err_count); } @@ -995,7 +996,7 @@ void __init init_irq_proc(void) struct proc_dir_entry *dir; int irq; - dir = proc_mkdir("irq", 0); + dir = proc_mkdir("irq", NULL); if (!dir) return; @@ -1050,3 +1051,34 @@ static int __init noirqdebug_setup(char *str) } __setup("noirqdebug", noirqdebug_setup); + +#ifdef CONFIG_HOTPLUG_CPU +/* + * The CPU has been marked offline. Migrate IRQs off this CPU. If + * the affinity settings do not allow other CPUs, force them onto any + * available CPU. + */ +void migrate_irqs(void) +{ + unsigned int i, cpu = smp_processor_id(); + + for (i = 0; i < NR_IRQS; i++) { + struct irqdesc *desc = irq_desc + i; + + if (desc->cpu == cpu) { + unsigned int newcpu = any_online_cpu(desc->affinity); + + if (newcpu == NR_CPUS) { + if (printk_ratelimit()) + printk(KERN_INFO "IRQ%u no longer affine to CPU%u\n", + i, cpu); + + cpus_setall(desc->affinity); + newcpu = any_online_cpu(desc->affinity); + } + + route_irq(desc, i, newcpu); + } + } +} +#endif /* CONFIG_HOTPLUG_CPU */ |