genirq: use iterators for irq_desc loops

Use for_each_irq_desc[_reverse] for all the iteration loops.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 6 insertions, 8 deletions

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index e6d47e8ca1ac..9ce1ab6c268d 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -137,14 +137,12 @@ static void bind_evtchn_to_cpu(unsigned int chn, unsigned int cpu)
 static void init_evtchn_cpu_bindings(void)
 {
 #ifdef CONFIG_SMP
+        struct irq_desc *desc;
         int i;
+
         /* By default all event channels notify CPU#0. */
-        for (i = 0; i < nr_irqs; i++) {
-                struct irq_desc *desc = irq_to_desc(i);
-                if (!desc)
-                        continue;
+        for_each_irq_desc(i, desc)
                 desc->affinity = cpumask_of_cpu(0);
-        }
 #endif
 
         memset(cpu_evtchn, 0, sizeof(cpu_evtchn));
@@ -233,7 +231,7 @@ static int find_unbound_irq(void)
         int irq;
 
         /* Only allocate from dynirq range */
-        for (irq = 0; irq < nr_irqs; irq++)
+        for_each_irq_nr(irq)
                 if (irq_bindcount[irq] == 0)
                         break;
 
@@ -794,7 +792,7 @@ void xen_irq_resume(void)
                 mask_evtchn(evtchn);
 
         /* No IRQ <-> event-channel mappings. */
-        for (irq = 0; irq < nr_irqs; irq++)
+        for_each_irq_nr(irq)
                 irq_info[irq].evtchn = 0; /* zap event-channel binding */
 
         for (evtchn = 0; evtchn < NR_EVENT_CHANNELS; evtchn++)
@@ -826,7 +824,7 @@ void __init xen_init_IRQ(void)
                 mask_evtchn(i);
 
         /* Dynamic IRQ space is currently unbound. Zero the refcnts. */
-        for (i = 0; i < nr_irqs; i++)
+        for_each_irq_nr(i)
                 irq_bindcount[i] = 0;
 
         irq_ctx_init(smp_processor_id());