From c78b9b65faa291def628dbd8539649f58299f0f3 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 16 Dec 2010 17:21:47 +0100 Subject: [PATCH] genirq: Implement generic irq_show_interrupts() All archs implement show_interrupts() in more or less the same way. That's tons of duplicated code with different bugs with no value. Implement a generic version and deprecate show_interrupts() Unfortunately we need some ifdeffery for !GENERIC_HARDIRQ archs. Signed-off-by: Thomas Gleixner --- include/linux/interrupt.h | 1 + kernel/irq/Kconfig | 3 +++ kernel/irq/proc.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 67 insertions(+) diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index de97b95..8da6643 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -671,6 +671,7 @@ static inline void init_irq_proc(void) struct seq_file; int show_interrupts(struct seq_file *p, void *v); +int arch_show_interrupts(struct seq_file *p, int prec); extern int early_irq_init(void); extern int arch_probe_nr_irqs(void); diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig index 8e42fec..4cd5d71 100644 --- a/kernel/irq/Kconfig +++ b/kernel/irq/Kconfig @@ -20,6 +20,9 @@ config HAVE_SPARSE_IRQ config GENERIC_IRQ_PROBE def_bool n +config GENERIC_IRQ_SHOW + def_bool n + config GENERIC_PENDING_IRQ def_bool n diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index a46bd76..2644923 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -11,6 +11,7 @@ #include #include #include +#include #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 -- 2.7.4