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authorThomas Gleixner <tglx@linutronix.de>2010-12-16 19:21:47 +0300
committerThomas Gleixner <tglx@linutronix.de>2011-02-19 14:58:13 +0300
commitc78b9b65faa291def628dbd8539649f58299f0f3 (patch)
treee5575932182c11373e522160491347dce2e0a003
parent1277a5325adfc53caac7dd3dac5d3d2fd2a125b4 (diff)
downloadlinux-c78b9b65faa291def628dbd8539649f58299f0f3.tar.xz
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 <tglx@linutronix.de>
-rw-r--r--include/linux/interrupt.h1
-rw-r--r--kernel/irq/Kconfig3
-rw-r--r--kernel/irq/proc.c63
3 files changed, 67 insertions, 0 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index de97b958f478..8da6643e39a6 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 8e42fec7686d..4cd5d7135e0f 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 a46bd762db47..26449239bb46 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