diff options
Diffstat (limited to 'kernel/irq/proc.c')
| -rw-r--r-- | kernel/irq/proc.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index a46bd762db4..26449239bb4 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -11,6 +11,7 @@ #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/interrupt.h> +#include <linux/kernel_stat.h> #include "internals.h" @@ -357,3 +358,65 @@ void init_irq_proc(void) } } +#ifdef CONFIG_GENERIC_IRQ_SHOW + +int __weak arch_show_interrupts(struct seq_file *p, int prec) +{ + return 0; +} + +int show_interrupts(struct seq_file *p, void *v) +{ + static int prec; + + unsigned long flags, any_count = 0; + int i = *(loff_t *) v, j; + struct irqaction *action; + struct irq_desc *desc; + + if (i > nr_irqs) + return 0; + + if (i == nr_irqs) + return arch_show_interrupts(p, prec); + + /* print header and calculate the width of the first column */ + if (i == 0) { + for (prec = 3, j = 1000; prec < 10 && j <= nr_irqs; ++prec) + j *= 10; + + seq_printf(p, "%*s", prec + 8, ""); + for_each_online_cpu(j) + seq_printf(p, "CPU%-8d", j); + seq_putc(p, '\n'); + } + + desc = irq_to_desc(i); + if (!desc) + return 0; + + raw_spin_lock_irqsave(&desc->lock, flags); + for_each_online_cpu(j) + any_count |= kstat_irqs_cpu(i, j); + action = desc->action; + if (!action && !any_count) + goto out; + + seq_printf(p, "%*d: ", prec, i); + for_each_online_cpu(j) + seq_printf(p, "%10u ", kstat_irqs_cpu(i, j)); + seq_printf(p, " %8s", desc->irq_data.chip->name); + seq_printf(p, "-%-8s", desc->name); + + if (action) { + seq_printf(p, " %s", action->name); + while ((action = action->next) != NULL) + seq_printf(p, ", %s", action->name); + } + + seq_putc(p, '\n'); +out: + raw_spin_unlock_irqrestore(&desc->lock, flags); + return 0; +} +#endif |