1 files changed, 46 insertions, 33 deletions

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index c6ac5583672a..b9cbb4570048 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -183,30 +183,46 @@ notrace void raw_local_irq_restore(unsigned long en)
 EXPORT_SYMBOL(raw_local_irq_restore);
 #endif /* CONFIG_PPC64 */
 
+static int show_other_interrupts(struct seq_file *p, int prec)
+{
+        int j;
+
+#if defined(CONFIG_PPC32) && defined(CONFIG_TAU_INT)
+        if (tau_initialized) {
+                seq_printf(p, "%*s: ", prec, "TAU");
+                for_each_online_cpu(j)
+                        seq_printf(p, "%10u ", tau_interrupts(j));
+                seq_puts(p, "  PowerPC             Thermal Assist (cpu temp)\n");
+        }
+#endif /* CONFIG_PPC32 && CONFIG_TAU_INT */
+
+        seq_printf(p, "%*s: %10u\n", prec, "BAD", ppc_spurious_interrupts);
+
+        return 0;
+}
+
 int show_interrupts(struct seq_file *p, void *v)
 {
-        int i = *(loff_t *)v, j;
+        unsigned long flags, any_count = 0;
+        int i = *(loff_t *) v, j, prec;
         struct irqaction *action;
         struct irq_desc *desc;
-        unsigned long flags;
 
+        if (i > nr_irqs)
+                return 0;
+
+        for (prec = 3, j = 1000; prec < 10 && j <= nr_irqs; ++prec)
+                j *= 10;
+
+        if (i == nr_irqs)
+                return show_other_interrupts(p, prec);
+
+        /* print header */
         if (i == 0) {
-                seq_puts(p, "           ");
+                seq_printf(p, "%*s", prec + 8, "");
                 for_each_online_cpu(j)
-                        seq_printf(p, "CPU%d       ", j);
+                        seq_printf(p, "CPU%-8d", j);
                 seq_putc(p, '\n');
-        } else if (i == nr_irqs) {
-#if defined(CONFIG_PPC32) && defined(CONFIG_TAU_INT)
-                if (tau_initialized){
-                        seq_puts(p, "TAU: ");
-                        for_each_online_cpu(j)
-                                seq_printf(p, "%10u ", tau_interrupts(j));
-                        seq_puts(p, "  PowerPC             Thermal Assist (cpu temp)\n");
-                }
-#endif /* CONFIG_PPC32 && CONFIG_TAU_INT*/
-                seq_printf(p, "BAD: %10u\n", ppc_spurious_interrupts);
-
-                return 0;
         }
 
         desc = irq_to_desc(i);
@@ -214,34 +230,31 @@ int show_interrupts(struct seq_file *p, void *v)
                 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 || !action->handler)
-                goto skip;
+        if (!action && !any_count)
+                goto out;
 
-        seq_printf(p, "%3d: ", i);
-#ifdef CONFIG_SMP
+        seq_printf(p, "%*d: ", prec, i);
         for_each_online_cpu(j)
                 seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
-#else
-        seq_printf(p, "%10u ", kstat_irqs(i));
-#endif /* CONFIG_SMP */
 
         if (desc->chip)
-                seq_printf(p, " %s ", desc->chip->name);
+                seq_printf(p, "  %-16s", desc->chip->name);
         else
-                seq_puts(p, "  None      ");
+                seq_printf(p, "  %-16s", "None");
+        seq_printf(p, " %-8s", (desc->status & IRQ_LEVEL) ? "Level" : "Edge");
 
-        seq_printf(p, "%s", (desc->status & IRQ_LEVEL) ? "Level " : "Edge  ");
-        seq_printf(p, "    %s", action->name);
+        if (action) {
+                seq_printf(p, "     %s", action->name);
+                while ((action = action->next) != NULL)
+                        seq_printf(p, ", %s", action->name);
+        }
 
-        for (action = action->next; action; action = action->next)
-                seq_printf(p, ", %s", action->name);
         seq_putc(p, '\n');
-
-skip:
+out:
         raw_spin_unlock_irqrestore(&desc->lock, flags);
-
         return 0;
 }