Merge branch 'genirq-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

This merges branches irq/genirq, irq/sparseirq-v4, timers/hpet-percpu
and x86/uv.

The sparseirq branch is just preliminary groundwork: no sparse IRQs are
actually implemented by this tree anymore - just the new APIs are added
while keeping the old way intact as well (the new APIs map 1:1 to
irq_desc[]).  The 'real' sparse IRQ support will then be a relatively
small patch ontop of this - with a v2.6.29 merge target.

* 'genirq-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (178 commits)
  genirq: improve include files
  intr_remapping: fix typo
  io_apic: make irq_mis_count available on 64-bit too
  genirq: fix name space collisions of nr_irqs in arch/*
  genirq: fix name space collision of nr_irqs in autoprobe.c
  genirq: use iterators for irq_desc loops
  proc: fixup irq iterator
  genirq: add reverse iterator for irq_desc
  x86: move ack_bad_irq() to irq.c
  x86: unify show_interrupts() and proc helpers
  x86: cleanup show_interrupts
  genirq: cleanup the sparseirq modifications
  genirq: remove artifacts from sparseirq removal
  genirq: revert dynarray
  genirq: remove irq_to_desc_alloc
  genirq: remove sparse irq code
  genirq: use inline function for irq_to_desc
  genirq: consolidate nr_irqs and for_each_irq_desc()
  x86: remove sparse irq from Kconfig
  genirq: define nr_irqs for architectures with GENERIC_HARDIRQS=n
  ...

1 files changed, 16 insertions, 27 deletions

diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c
index 533068cfb607..cc0f7321b8ce 100644
--- a/kernel/irq/autoprobe.c
+++ b/kernel/irq/autoprobe.c
@@ -30,17 +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_desc + i;
-
+	for_each_irq_desc_reverse(i, desc) {
 		spin_lock_irq(&desc->lock);
 		if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
 			/*
@@ -68,9 +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_desc + i;
-
+	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;
@@ -88,11 +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_desc + i;
+	for_each_irq_desc(i, desc) {
 		spin_lock_irq(&desc->lock);
 		status = desc->status;
 
@@ -126,14 +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_desc + i;
-		unsigned int status;
-
+	for_each_irq_desc(i, desc) {
 		spin_lock_irq(&desc->lock);
 		status = desc->status;
 
@@ -171,20 +161,19 @@ EXPORT_SYMBOL(probe_irq_mask);
  */
 int probe_irq_off(unsigned long val)
 {
-	int i, irq_found = 0, nr_irqs = 0;
-
-	for (i = 0; i < NR_IRQS; i++) {
-		struct irq_desc *desc = irq_desc + i;
-		unsigned int status;
+	int i, irq_found = 0, nr_of_irqs = 0;
+	struct irq_desc *desc;
+	unsigned int status;
 
+	for_each_irq_desc(i, desc) {
 		spin_lock_irq(&desc->lock);
 		status = desc->status;
 
 		if (status & IRQ_AUTODETECT) {
 			if (!(status & IRQ_WAITING)) {
-				if (!nr_irqs)
+				if (!nr_of_irqs)
 					irq_found = i;
-				nr_irqs++;
+				nr_of_irqs++;
 			}
 			desc->status = status & ~IRQ_AUTODETECT;
 			desc->chip->shutdown(i);
@@ -193,7 +182,7 @@ int probe_irq_off(unsigned long val)
 	}
 	mutex_unlock(&probing_active);
 
-	if (nr_irqs > 1)
+	if (nr_of_irqs > 1)
 		irq_found = -irq_found;
 
 	return irq_found;