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-rw-r--r--drivers/xen/events.c14
-rw-r--r--kernel/irq/autoprobe.c45
-rw-r--r--kernel/irq/handle.c5
3 files changed, 21 insertions, 43 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());
diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c
index b3a5549ea81e..0cbff18efb6d 100644
--- a/kernel/irq/autoprobe.c
+++ b/kernel/irq/autoprobe.c
@@ -30,19 +30,16 @@ static DEFINE_MUTEX(probing_active);
unsigned long probe_irq_on(void)
{
struct irq_desc *desc;
- unsigned long mask;
- unsigned int i;
+ unsigned long mask = 0;
+ unsigned int status;
+ int i;
mutex_lock(&probing_active);
/*
* something may have generated an irq long ago and we want to
* flush such a longstanding irq before considering it as spurious.
*/
- for (i = nr_irqs-1; i > 0; i--) {
- desc = irq_to_desc(i);
- if (!desc)
- continue;
-
+ for_each_irq_desc_reverse(i, desc) {
spin_lock_irq(&desc->lock);
if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
/*
@@ -70,11 +67,7 @@ unsigned long probe_irq_on(void)
* (we must startup again here because if a longstanding irq
* happened in the previous stage, it may have masked itself)
*/
- for (i = nr_irqs-1; i > 0; i--) {
- desc = irq_to_desc(i);
- if (!desc)
- continue;
-
+ for_each_irq_desc_reverse(i, desc) {
spin_lock_irq(&desc->lock);
if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
desc->status |= IRQ_AUTODETECT | IRQ_WAITING;
@@ -92,13 +85,7 @@ unsigned long probe_irq_on(void)
/*
* Now filter out any obviously spurious interrupts
*/
- mask = 0;
- for (i = 0; i < nr_irqs; i++) {
- unsigned int status;
-
- desc = irq_to_desc(i);
- if (!desc)
- continue;
+ for_each_irq_desc(i, desc) {
spin_lock_irq(&desc->lock);
status = desc->status;
@@ -132,16 +119,11 @@ EXPORT_SYMBOL(probe_irq_on);
*/
unsigned int probe_irq_mask(unsigned long val)
{
- unsigned int mask;
+ unsigned int status, mask = 0;
+ struct irq_desc *desc;
int i;
- mask = 0;
- for (i = 0; i < nr_irqs; i++) {
- struct irq_desc *desc = irq_to_desc(i);
- unsigned int status;
-
- if (!desc)
- continue;
+ for_each_irq_desc(i, desc) {
spin_lock_irq(&desc->lock);
status = desc->status;
@@ -180,13 +162,10 @@ EXPORT_SYMBOL(probe_irq_mask);
int probe_irq_off(unsigned long val)
{
int i, irq_found = 0, nr_irqs = 0;
+ struct irq_desc *desc;
+ unsigned int status;
- for (i = 0; i < nr_irqs; i++) {
- struct irq_desc *desc = irq_to_desc(i);
- unsigned int status;
-
- if (!desc)
- continue;
+ for_each_irq_desc(i, desc) {
spin_lock_irq(&desc->lock);
status = desc->status;
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index a69368ff607f..c815b42d0f5b 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -268,9 +268,10 @@ static struct lock_class_key irq_desc_lock_class;
void early_init_irq_lock_class(void)
{
+ struct irq_desc *desc;
int i;
- for (i = 0; i < nr_irqs; i++)
- lockdep_set_class(&irq_desc[i].lock, &irq_desc_lock_class);
+ for_each_irq_desc(i, desc)
+ lockdep_set_class(&desc->lock, &irq_desc_lock_class);
}
#endif