Merge branch 'genirq' of master.kernel.org:/home/rmk/linux-2.6-arm

* 'genirq' of master.kernel.org:/home/rmk/linux-2.6-arm: (24 commits)
  [ARM] 3683/2:  ARM: Convert at91rm9200 to generic irq handling
  [ARM] 3682/2:  ARM: Convert ixp4xx to generic irq handling
  [ARM] 3702/1: ARM: Convert ixp23xx to generic irq handling
  [ARM] 3701/1: ARM: Convert plat-omap to generic irq handling
  [ARM] 3700/1: ARM: Convert lh7a40x to generic irq handling
  [ARM] 3699/1: ARM: Convert s3c2410 to generic irq handling
  [ARM] 3698/1: ARM: Convert sa1100 to generic irq handling
  [ARM] 3697/1: ARM: Convert shark to generic irq handling
  [ARM] 3696/1: ARM: Convert clps711x to generic irq handling
  [ARM] 3694/1: ARM: Convert ecard driver to generic irq handling
  [ARM] 3693/1: ARM: Convert omap1 to generic irq handling
  [ARM] 3691/1: ARM: Convert imx to generic irq handling
  [ARM] 3688/1: ARM: Convert clps7500 to generic irq handling
  [ARM] 3687/1: ARM: Convert integrator to generic irq handling
  [ARM] 3685/1: ARM: Convert pxa to generic irq handling
  [ARM] 3684/1: ARM: Convert l7200 to generic irq handling
  [ARM] 3681/1: ARM: Convert ixp2000 to generic irq handling
  [ARM] 3680/1: ARM: Convert footbridge to generic irq handling
  [ARM] 3695/1: ARM drivers/pcmcia: Fixup includes
  [ARM] 3689/1: ARM drivers/input/touchscreen: Fixup includes
  ...

Manual conflict resolved in kernel/irq/handle.c (butt-ugly ARM tickless
code).

51 files changed, 208 insertions, 1082 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 919d8b92aaa..f81a62380ad 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -47,6 +47,18 @@ config MCA
 	  <file:Documentation/mca.txt> (and especially the web page given
 	  there) before attempting to build an MCA bus kernel.
 
+config GENERIC_HARDIRQS
+	bool
+	default y
+
+config HARDIRQS_SW_RESEND
+	bool
+	default y
+
+config GENERIC_IRQ_PROBE
+	bool
+	default y
+
 config RWSEM_GENERIC_SPINLOCK
 	bool
 	default y
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index c02dc8116a1..f3c1ebfdd0a 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -33,6 +33,7 @@
 
 static void __iomem *gic_dist_base;
 static void __iomem *gic_cpu_base;
+static DEFINE_SPINLOCK(irq_controller_lock);
 
 /*
  * Routines to acknowledge, disable and enable interrupts
@@ -52,32 +53,45 @@ static void __iomem *gic_cpu_base;
 static void gic_ack_irq(unsigned int irq)
 {
 	u32 mask = 1 << (irq % 32);
+
+	spin_lock(&irq_controller_lock);
 	writel(mask, gic_dist_base + GIC_DIST_ENABLE_CLEAR + (irq / 32) * 4);
 	writel(irq, gic_cpu_base + GIC_CPU_EOI);
+	spin_unlock(&irq_controller_lock);
 }
 
 static void gic_mask_irq(unsigned int irq)
 {
 	u32 mask = 1 << (irq % 32);
+
+	spin_lock(&irq_controller_lock);
 	writel(mask, gic_dist_base + GIC_DIST_ENABLE_CLEAR + (irq / 32) * 4);
+	spin_unlock(&irq_controller_lock);
 }
 
 static void gic_unmask_irq(unsigned int irq)
 {
 	u32 mask = 1 << (irq % 32);
+
+	spin_lock(&irq_controller_lock);
 	writel(mask, gic_dist_base + GIC_DIST_ENABLE_SET + (irq / 32) * 4);
+	spin_unlock(&irq_controller_lock);
 }
 
 #ifdef CONFIG_SMP
-static void gic_set_cpu(struct irqdesc *desc, unsigned int irq, unsigned int cpu)
+static void gic_set_cpu(unsigned int irq, cpumask_t mask_val)
 {
 	void __iomem *reg = gic_dist_base + GIC_DIST_TARGET + (irq & ~3);
 	unsigned int shift = (irq % 4) * 8;
+	unsigned int cpu = first_cpu(mask_val);
 	u32 val;
 
+	spin_lock(&irq_controller_lock);
+	irq_desc[irq].cpu = cpu;
 	val = readl(reg) & ~(0xff << shift);
 	val |= 1 << (cpu + shift);
 	writel(val, reg);
+	spin_unlock(&irq_controller_lock);
 }
 #endif
 
@@ -86,7 +100,7 @@ static struct irqchip gic_chip = {
 	.mask		= gic_mask_irq,
 	.unmask		= gic_unmask_irq,
 #ifdef CONFIG_SMP
-	.set_cpu	= gic_set_cpu,
+	.set_affinity	= gic_set_cpu,
 #endif
 };
 
diff --git a/arch/arm/common/sa1111.c b/arch/arm/common/sa1111.c
index fe06a36a213..1cdb26a47e1 100644
--- a/arch/arm/common/sa1111.c
+++ b/arch/arm/common/sa1111.c
@@ -150,7 +150,7 @@ static void
 sa1111_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
 {
 	unsigned int stat0, stat1, i;
-	void __iomem *base = desc->data;
+	void __iomem *base = get_irq_data(irq);
 
 	stat0 = sa1111_readl(base + SA1111_INTSTATCLR0);
 	stat1 = sa1111_readl(base + SA1111_INTSTATCLR1);
@@ -168,11 +168,11 @@ sa1111_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
 
 	for (i = IRQ_SA1111_START; stat0; i++, stat0 >>= 1)
 		if (stat0 & 1)
-			do_edge_IRQ(i, irq_desc + i, regs);
+			handle_edge_irq(i, irq_desc + i, regs);
 
 	for (i = IRQ_SA1111_START + 32; stat1; i++, stat1 >>= 1)
 		if (stat1 & 1)
-			do_edge_IRQ(i, irq_desc + i, regs);
+			handle_edge_irq(i, irq_desc + i, regs);
 
 	/* For level-based interrupts */
 	desc->chip->unmask(irq);
diff --git a/arch/arm/common/time-acorn.c b/arch/arm/common/time-acorn.c
index 486add853fb..31b65e2231d 100644
--- a/arch/arm/common/time-acorn.c
+++ b/arch/arm/common/time-acorn.c
@@ -16,6 +16,7 @@
 #include <linux/timex.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 
 #include <asm/hardware.h>
 #include <asm/io.h>
diff --git a/arch/arm/kernel/ecard.c b/arch/arm/kernel/ecard.c
index 68a257666d9..ab4ad9562ee 100644
--- a/arch/arm/kernel/ecard.c
+++ b/arch/arm/kernel/ecard.c
@@ -619,7 +619,7 @@ ecard_irqexp_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *reg
 		ecard_t *ec = slot_to_ecard(slot);
 
 		if (ec->claimed) {
-			struct irqdesc *d = irqdesc + ec->irq;
+			struct irq_desc *d = irq_desc + ec->irq;
 			/*
 			 * this ugly code is so that we can operate a
 			 * prioritorising system:
diff --git a/arch/arm/kernel/fiq.c b/arch/arm/kernel/fiq.c
index 1ec3f7faa25..e8e90346f11 100644
--- a/arch/arm/kernel/fiq.c
+++ b/arch/arm/kernel/fiq.c
@@ -38,6 +38,7 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/interrupt.h>
 #include <linux/seq_file.h>
 
 #include <asm/cacheflush.h>
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index 4d31cf8d02d..c3d4e94ef5b 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -26,6 +26,7 @@
 #include <linux/signal.h>
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/ptrace.h>
 #include <linux/slab.h>
 #include <linux/random.h>
@@ -37,192 +38,18 @@
 #include <linux/kallsyms.h>
 #include <linux/proc_fs.h>
 
-#include <asm/irq.h>
 #include <asm/system.h>
-#include <asm/mach/irq.h>
 #include <asm/mach/time.h>
 
 /*
- * Maximum IRQ count.  Currently, this is arbitary.  However, it should
- * not be set too low to prevent false triggering.  Conversely, if it
- * is set too high, then you could miss a stuck IRQ.
- *
- * Maybe we ought to set a timer and re-enable the IRQ at a later time?
- */
-#define MAX_IRQ_CNT	100000
-
-static int noirqdebug __read_mostly;
-static volatile unsigned long irq_err_count;
-static DEFINE_SPINLOCK(irq_controller_lock);
-static LIST_HEAD(irq_pending);
-
-struct irqdesc irq_desc[NR_IRQS];
-void (*init_arch_irq)(void) __initdata = NULL;
-
-/*
  * No architecture-specific irq_finish function defined in arm/arch/irqs.h.
  */
 #ifndef irq_finish
 #define irq_finish(irq) do { } while (0)
 #endif
 
-/*
- * Dummy mask/unmask handler
- */
-void dummy_mask_unmask_irq(unsigned int irq)
-{
-}
-
-irqreturn_t no_action(int irq, void *dev_id, struct pt_regs *regs)
-{
-	return IRQ_NONE;
-}
-
-void do_bad_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
-{
-	irq_err_count++;
-	printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq);
-}
-
-static struct irqchip bad_chip = {
-	.ack	= dummy_mask_unmask_irq,
-	.mask	= dummy_mask_unmask_irq,
-	.unmask = dummy_mask_unmask_irq,
-};
-
-static struct irqdesc bad_irq_desc = {
-	.chip		= &bad_chip,
-	.handle		= do_bad_IRQ,
-	.pend		= LIST_HEAD_INIT(bad_irq_desc.pend),
-	.disable_depth	= 1,
-};
-
-#ifdef CONFIG_SMP
-void synchronize_irq(unsigned int irq)
-{
-	struct irqdesc *desc = irq_desc + irq;
-
-	while (desc->running)
-		barrier();
-}
-EXPORT_SYMBOL(synchronize_irq);
-
-#define smp_set_running(desc)	do { desc->running = 1; } while (0)
-#define smp_clear_running(desc)	do { desc->running = 0; } while (0)
-#else
-#define smp_set_running(desc)	do { } while (0)
-#define smp_clear_running(desc)	do { } while (0)
-#endif
-
-/**
- *	disable_irq_nosync - disable an irq without waiting
- *	@irq: Interrupt to disable
- *
- *	Disable the selected interrupt line.  Enables and disables
- *	are nested.  We do this lazily.
- *
- *	This function may be called from IRQ context.
- */
-void disable_irq_nosync(unsigned int irq)
-{
-	struct irqdesc *desc = irq_desc + irq;
-	unsigned long flags;
-
-	spin_lock_irqsave(&irq_controller_lock, flags);
-	desc->disable_depth++;
-	list_del_init(&desc->pend);
-	spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-EXPORT_SYMBOL(disable_irq_nosync);
-
-/**
- *	disable_irq - disable an irq and wait for completion
- *	@irq: Interrupt to disable
- *
- *	Disable the selected interrupt line.  Enables and disables
- *	are nested.  This functions waits for any pending IRQ
- *	handlers for this interrupt to complete before returning.
- *	If you use this function while holding a resource the IRQ
- *	handler may need you will deadlock.
- *
- *	This function may be called - with care - from IRQ context.
- */
-void disable_irq(unsigned int irq)
-{
-	struct irqdesc *desc = irq_desc + irq;
-
-	disable_irq_nosync(irq);
-	if (desc->action)
-		synchronize_irq(irq);
-}
-EXPORT_SYMBOL(disable_irq);
-
-/**
- *	enable_irq - enable interrupt handling on an irq
- *	@irq: Interrupt to enable
- *
- *	Re-enables the processing of interrupts on this IRQ line.
- *	Note that this may call the interrupt handler, so you may
- *	get unexpected results if you hold IRQs disabled.
- *
- *	This function may be called from IRQ context.
- */
-void enable_irq(unsigned int irq)
-{
-	struct irqdesc *desc = irq_desc + irq;
-	unsigned long flags;
-
-	spin_lock_irqsave(&irq_controller_lock, flags);
-	if (unlikely(!desc->disable_depth)) {
-		printk("enable_irq(%u) unbalanced from %p\n", irq,
-			__builtin_return_address(0));
-	} else if (!--desc->disable_depth) {
-		desc->probing = 0;
-		desc->chip->unmask(irq);
-
-		/*
-		 * If the interrupt is waiting to be processed,
-		 * try to re-run it.  We can't directly run it
-		 * from here since the caller might be in an
-		 * interrupt-protected region.
-		 */
-		if (desc->pending && list_empty(&desc->pend)) {
-			desc->pending = 0;
-			if (!desc->chip->retrigger ||
-			    desc->chip->retrigger(irq))
-				list_add(&desc->pend, &irq_pending);
-		}
-	}
-	spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-EXPORT_SYMBOL(enable_irq);
-
-/*
- * Enable wake on selected irq
- */
-void enable_irq_wake(unsigned int irq)
-{
-	struct irqdesc *desc = irq_desc + irq;
-	unsigned long flags;
-
-	spin_lock_irqsave(&irq_controller_lock, flags);
-	if (desc->chip->set_wake)
-		desc->chip->set_wake(irq, 1);
-	spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-EXPORT_SYMBOL(enable_irq_wake);
-
-void disable_irq_wake(unsigned int irq)
-{
-	struct irqdesc *desc = irq_desc + irq;
-	unsigned long flags;
-
-	spin_lock_irqsave(&irq_controller_lock, flags);
-	if (desc->chip->set_wake)
-		desc->chip->set_wake(irq, 0);
-	spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-EXPORT_SYMBOL(disable_irq_wake);
+void (*init_arch_irq)(void) __initdata = NULL;
+unsigned long irq_err_count;
 
 int show_interrupts(struct seq_file *p, void *v)
 {
@@ -242,8 +69,8 @@ int show_interrupts(struct seq_file *p, void *v)
 	}
 
 	if (i < NR_IRQS) {
-		spin_lock_irqsave(&irq_controller_lock, flags);
-	    	action = irq_desc[i].action;
+		spin_lock_irqsave(&irq_desc[i].lock, flags);
+		action = irq_desc[i].action;
 		if (!action)
 			goto unlock;
 
@@ -256,7 +83,7 @@ int show_interrupts(struct seq_file *p, void *v)
 
 		seq_putc(p, '\n');
 unlock:
-		spin_unlock_irqrestore(&irq_controller_lock, flags);
+		spin_unlock_irqrestore(&irq_desc[i].lock, flags);
 	} else if (i == NR_IRQS) {
 #ifdef CONFIG_ARCH_ACORN
 		show_fiq_list(p, v);
@@ -270,267 +97,11 @@ unlock:
 	return 0;
 }
 
-/*
- * IRQ lock detection.
- *
- * Hopefully, this should get us out of a few locked situations.
- * However, it may take a while for this to happen, since we need
- * a large number if IRQs to appear in the same jiffie with the
- * same instruction pointer (or within 2 instructions).
- */
-static int check_irq_lock(struct irqdesc *desc, int irq, struct pt_regs *regs)
-{
-	unsigned long instr_ptr = instruction_pointer(regs);
-
-	if (desc->lck_jif == jiffies &&
-	    desc->lck_pc >= instr_ptr && desc->lck_pc < instr_ptr + 8) {
-		desc->lck_cnt += 1;
-
-		if (desc->lck_cnt > MAX_IRQ_CNT) {
-			printk(KERN_ERR "IRQ LOCK: IRQ%d is locking the system, disabled\n", irq);
-			return 1;
-		}
-	} else {
-		desc->lck_cnt = 0;
-		desc->lck_pc  = instruction_pointer(regs);
-		desc->lck_jif = jiffies;
-	}
-	return 0;
-}
-
-static void
-report_bad_irq(unsigned int irq, struct pt_regs *regs, struct irqdesc *desc, int ret)
-{
-	static int count = 100;
-	struct irqaction *action;
-
-	if (noirqdebug)
-		return;
-
-	if (ret != IRQ_HANDLED && ret != IRQ_NONE) {
-		if (!count)
-			return;
-		count--;
-		printk("irq%u: bogus retval mask %x\n", irq, ret);
-	} else {
-		desc->irqs_unhandled++;
-		if (desc->irqs_unhandled <= 99900)
-			return;
-		desc->irqs_unhandled = 0;
-		printk("irq%u: nobody cared\n", irq);
-	}
-	show_regs(regs);
-	dump_stack();
-	printk(KERN_ERR "handlers:");
-	action = desc->action;
-	do {
-		printk("\n" KERN_ERR "[<%p>]", action->handler);
-		print_symbol(" (%s)", (unsigned long)action->handler);
-		action = action->next;
-	} while (action);
-	printk("\n");
-}
-
-static int
-__do_irq(unsigned int irq, struct irqaction *action, struct pt_regs *regs)
-{
-	unsigned int status;
-	int ret, retval = 0;
-
-	spin_unlock(&irq_controller_lock);
-
-#ifdef CONFIG_NO_IDLE_HZ
-	if (!(action->flags & SA_TIMER) && system_timer->dyn_tick != NULL) {
-		spin_lock(&system_timer->dyn_tick->lock);
-		if (system_timer->dyn_tick->state & DYN_TICK_ENABLED)
-			system_timer->dyn_tick->handler(irq, 0, regs);
-		spin_unlock(&system_timer->dyn_tick->lock);
-	}
-#endif
-
-	if (!(action->flags & SA_INTERRUPT))
-		local_irq_enable();
-
-	status = 0;
-	do {
-		ret = action->handler(irq, action->dev_id, regs);
-		if (ret == IRQ_HANDLED)
-			status |= action->flags;
-		retval |= ret;
-		action = action->next;
-	} while (action);
-
-	if (status & SA_SAMPLE_RANDOM)
-		add_interrupt_randomness(irq);
-
-	spin_lock_irq(&irq_controller_lock);
-
-	return retval;
-}
-
-/*
- * This is for software-decoded IRQs.  The caller is expected to
- * handle the ack, clear, mask and unmask issues.
- */
-void
-do_simple_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
-{
-	struct irqaction *action;
-	const unsigned int cpu = smp_processor_id();
-
-	desc->triggered = 1;
-
-	kstat_cpu(cpu).irqs[irq]++;
-
-	smp_set_running(desc);
-
-	action = desc->action;
-	if (action) {
-		int ret = __do_irq(irq, action, regs);
-		if (ret != IRQ_HANDLED)
-			report_bad_irq(irq, regs, desc, ret);
-	}
-
-	smp_clear_running(desc);
-}
-
-/*
- * Most edge-triggered IRQ implementations seem to take a broken
- * approach to this.  Hence the complexity.
- */
-void
-do_edge_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
-{
-	const unsigned int cpu = smp_processor_id();
-
-	desc->triggered = 1;
-
-	/*
-	 * If we're currently running this IRQ, or its disabled,
-	 * we shouldn't process the IRQ.  Instead, turn on the
-	 * hardware masks.
-	 */
-	if (unlikely(desc->running || desc->disable_depth))
-		goto running;
-
-	/*
-	 * Acknowledge and clear the IRQ, but don't mask it.
-	 */
-	desc->chip->ack(irq);
-
-	/*
-	 * Mark the IRQ currently in progress.
-	 */
-	desc->running = 1;
-
-	kstat_cpu(cpu).irqs[irq]++;
-
-	do {
-		struct irqaction *action;
-
-		action = desc->action;
-		if (!action)
-			break;
-
-		if (desc->pending && !desc->disable_depth) {
-			desc->pending = 0;
-			desc->chip->unmask(irq);
-		}
-
-		__do_irq(irq, action, regs);
-	} while (desc->pending && !desc->disable_depth);
-
-	desc->running = 0;
-
-	/*
-	 * If we were disabled or freed, shut down the handler.
-	 */
-	if (likely(desc->action && !check_irq_lock(desc, irq, regs)))
-		return;
-
- running:
-	/*
-	 * We got another IRQ while this one was masked or
-	 * currently running.  Delay it.
-	 */
-	desc->pending = 1;
-	desc->chip->mask(irq);
-	desc->chip->ack(irq);
-}
-
-/*
- * Level-based IRQ handler.  Nice and simple.
- */
-void
-do_level_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
-{
-	struct irqaction *action;
-	const unsigned int cpu = smp_processor_id();
-
-	desc->triggered = 1;
-
-	/*
-	 * Acknowledge, clear _AND_ disable the interrupt.
-	 */
-	desc->chip->ack(irq);
-
-	if (likely(!desc->disable_depth)) {
-		kstat_cpu(cpu).irqs[irq]++;
-
-		smp_set_running(desc);
-
-		/*
-		 * Return with this interrupt masked if no action
-		 */
-		action = desc->action;
-		if (action) {
-			int ret = __do_irq(irq, desc->action, regs);
-
-			if (ret != IRQ_HANDLED)
-				report_bad_irq(irq, regs, desc, ret);
-
-			if (likely(!desc->disable_depth &&
-				   !check_irq_lock(desc, irq, regs)))
-				desc->chip->unmask(irq);
-		}
-
-		smp_clear_running(desc);
-	}
-}
-
-static void do_pending_irqs(struct pt_regs *regs)
-{
-	struct list_head head, *l, *n;
-
-	do {
-		struct irqdesc *desc;
-
-		/*
-		 * First, take the pending interrupts off the list.
-		 * The act of calling the handlers may add some IRQs
-		 * back onto the list.
-		 */
-		head = irq_pending;
-		INIT_LIST_HEAD(&irq_pending);
-		head.next->prev = &head;
-		head.prev->next = &head;
-
-		/*
-		 * Now run each entry.  We must delete it from our
-		 * list before calling the handler.
-		 */
-		list_for_each_safe(l, n, &head) {
-			desc = list_entry(l, struct irqdesc, pend);
-			list_del_init(&desc->pend);
-			desc_handle_irq(desc - irq_desc, desc, regs);
-		}
-
-		/*
-		 * The list must be empty.
-		 */
-		BUG_ON(!list_empty(&head));
-	} while (!list_empty(&irq_pending));
-}
+/* Handle bad interrupts */
+static struct irq_desc bad_irq_desc = {
+	.handle_irq = handle_bad_irq,
+	.lock = SPIN_LOCK_UNLOCKED
+};
 
 /*
  * do_IRQ handles all hardware IRQ's.  Decoded IRQs should not
@@ -549,96 +120,15 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
 		desc = &bad_irq_desc;
 
 	irq_enter();
-	spin_lock(&irq_controller_lock);
-	desc_handle_irq(irq, desc, regs);
 
-	/*
-	 * Now re-run any pending interrupts.
-	 */
-	if (!list_empty(&irq_pending))
-		do_pending_irqs(regs);
+	desc_handle_irq(irq, desc, regs);
 
+	/* AT91 specific workaround */
 	irq_finish(irq);
 
-	spin_unlock(&irq_controller_lock);
 	irq_exit();
 }
 
-void __set_irq_handler(unsigned int irq, irq_handler_t handle, int is_chained)
-{
-	struct irqdesc *desc;
-	unsigned long flags;
-
-	if (irq >= NR_IRQS) {
-		printk(KERN_ERR "Trying to install handler for IRQ%d\n", irq);
-		return;
-	}
-
-	if (handle == NULL)
-		handle = do_bad_IRQ;
-
-	desc = irq_desc + irq;
-
-	if (is_chained && desc->chip == &bad_chip)
-		printk(KERN_WARNING "Trying to install chained handler for IRQ%d\n", irq);
-
-	spin_lock_irqsave(&irq_controller_lock, flags);
-	if (handle == do_bad_IRQ) {
-		desc->chip->mask(irq);
-		desc->chip->ack(irq);
-		desc->disable_depth = 1;
-	}
-	desc->handle = handle;
-	if (handle != do_bad_IRQ && is_chained) {
-		desc->valid = 0;
-		desc->probe_ok = 0;
-		desc->disable_depth = 0;
-		desc->chip->unmask(irq);
-	}
-	spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-
-void set_irq_chip(unsigned int irq, struct irqchip *chip)
-{
-	struct irqdesc *desc;
-	unsigned long flags;
-
-	if (irq >= NR_IRQS) {
-		printk(KERN_ERR "Trying to install chip for IRQ%d\n", irq);
-		return;
-	}
-
-	if (chip == NULL)
-		chip = &bad_chip;
-
-	desc = irq_desc + irq;
-	spin_lock_irqsave(&irq_controller_lock, flags);
-	desc->chip = chip;
-	spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-
-int set_irq_type(unsigned int irq, unsigned int type)
-{
-	struct irqdesc *desc;
-	unsigned long flags;
-	int ret = -ENXIO;
-
-	if (irq >= NR_IRQS) {
-		printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq);
-		return -ENODEV;
-	}
-
-	desc = irq_desc + irq;
-	if (desc->chip->set_type) {
-		spin_lock_irqsave(&irq_controller_lock, flags);
-		ret = desc->chip->set_type(irq, type);
-		spin_unlock_irqrestore(&irq_controller_lock, flags);
-	}
-
-	return ret;
-}
-EXPORT_SYMBOL(set_irq_type);
-
 void set_irq_flags(unsigned int irq, unsigned int iflags)
 {
 	struct irqdesc *desc;
@@ -650,421 +140,32 @@ void set_irq_flags(unsigned int irq, unsigned int iflags)
 	}
 
 	desc = irq_desc + irq;
-	spin_lock_irqsave(&irq_controller_lock, flags);
-	desc->valid = (iflags & IRQF_VALID) != 0;
-	desc->probe_ok = (iflags & IRQF_PROBE) != 0;
-	desc->noautoenable = (iflags & IRQF_NOAUTOEN) != 0;
-	spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-
-int setup_irq(unsigned int irq, struct irqaction *new)
-{
-	int shared = 0;
-	struct irqaction *old, **p;
-	unsigned long flags;
-	struct irqdesc *desc;
-
-	/*
-	 * Some drivers like serial.c use request_irq() heavily,
-	 * so we have to be careful not to interfere with a
-	 * running system.
-	 */
-	if (new->flags & SA_SAMPLE_RANDOM) {
-		/*
-		 * This function might sleep, we want to call it first,
-		 * outside of the atomic block.
-		 * Yes, this might clear the entropy pool if the wrong
-		 * driver is attempted to be loaded, without actually
-		 * installing a new handler, but is this really a problem,
-		 * only the sysadmin is able to do this.
-		 */
-	        rand_initialize_irq(irq);
-	}
-
-	/*
-	 * The following block of code has to be executed atomically
-	 */
-	desc = irq_desc + irq;
-	spin_lock_irqsave(&irq_controller_lock, flags);
-	p = &desc->action;
-	if ((old = *p) != NULL) {
-		/*
-		 * Can't share interrupts unless both agree to and are
-		 * the same type.
-		 */
-		if (!(old->flags & new->flags & SA_SHIRQ) ||
-		    (~old->flags & new->flags) & SA_TRIGGER_MASK) {
-			spin_unlock_irqrestore(&irq_controller_lock, flags);
-			return -EBUSY;
-		}
-
-		/* add new interrupt at end of irq queue */
-		do {
-			p = &old->next;
-			old = *p;
-		} while (old);
-		shared = 1;
-	}
-
-	*p = new;
-
-	if (!shared) {
- 		desc->probing = 0;
-		desc->running = 0;
-		desc->pending = 0;
-		desc->disable_depth = 1;
-
-		if (new->flags & SA_TRIGGER_MASK &&
-		    desc->chip->set_type) {
-			unsigned int type = new->flags & SA_TRIGGER_MASK;
-			desc->chip->set_type(irq, type);
-		}
-
-		if (!desc->noautoenable) {
-			desc->disable_depth = 0;
-			desc->chip->unmask(irq);
-		}
-	}
-
-	spin_unlock_irqrestore(&irq_controller_lock, flags);
-	return 0;
-}
-
-/**
- *	request_irq - allocate an interrupt line
- *	@irq: Interrupt line to allocate
- *	@handler: Function to be called when the IRQ occurs
- *	@irqflags: Interrupt type flags
- *	@devname: An ascii name for the claiming device
- *	@dev_id: A cookie passed back to the handler function
- *
- *	This call allocates interrupt resources and enables the
- *	interrupt line and IRQ handling. From the point this
- *	call is made your handler function may be invoked. Since
- *	your handler function must clear any interrupt the board
- *	raises, you must take care both to initialise your hardware
- *	and to set up the interrupt handler in the right order.
- *
- *	Dev_id must be globally unique. Normally the address of the
- *	device data structure is used as the cookie. Since the handler
- *	receives this value it makes sense to use it.
- *
- *	If your interrupt is shared you must pass a non NULL dev_id
- *	as this is required when freeing the interrupt.
- *
- *	Flags:
- *
- *	SA_SHIRQ		Interrupt is shared
- *
- *	SA_INTERRUPT		Disable local interrupts while processing
- *
- *	SA_SAMPLE_RANDOM	The interrupt can be used for entropy
- *
- */
-int request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
-		 unsigned long irq_flags, const char * devname, void *dev_id)
-{
-	unsigned long retval;
-	struct irqaction *action;
-
-	if (irq >= NR_IRQS || !irq_desc[irq].valid || !handler ||
-	    (irq_flags & SA_SHIRQ && !dev_id))
-		return -EINVAL;
-
-	action = (struct irqaction *)kmalloc(sizeof(struct irqaction), GFP_KERNEL);
-	if (!action)
-		return -ENOMEM;
-
-	action->handler = handler;
-	action->flags = irq_flags;
-	cpus_clear(action->mask);
-	action->name = devname;
-	action->next = NULL;
-	action->dev_id = dev_id;
-
-	retval = setup_irq(irq, action);
-
-	if (retval)
-		kfree(action);
-	return retval;
-}
-
-EXPORT_SYMBOL(request_irq);
-
-/**
- *	free_irq - free an interrupt
- *	@irq: Interrupt line to free
- *	@dev_id: Device identity to free
- *
- *	Remove an interrupt handler. The handler is removed and if the
- *	interrupt line is no longer in use by any driver it is disabled.
- *	On a shared IRQ the caller must ensure the interrupt is disabled
- *	on the card it drives before calling this function.
- *
- *	This function must not be called from interrupt context.
- */
-void free_irq(unsigned int irq, void *dev_id)
-{
-	struct irqaction * action, **p;
-	unsigned long flags;
-
-	if (irq >= NR_IRQS || !irq_desc[irq].valid) {
-		printk(KERN_ERR "Trying to free IRQ%d\n",irq);
-		dump_stack();
-		return;
-	}
-
-	spin_lock_irqsave(&irq_controller_lock, flags);
-	for (p = &irq_desc[irq].action; (action = *p) != NULL; p = &action->next) {
-		if (action->dev_id != dev_id)
-			continue;
-
-	    	/* Found it - now free it */
-		*p = action->next;
-		break;
-	}
-	spin_unlock_irqrestore(&irq_controller_lock, flags);
-
-	if (!action) {
-		printk(KERN_ERR "Trying to free free IRQ%d\n",irq);
-		dump_stack();
-	} else {
-		synchronize_irq(irq);
-		kfree(action);
-	}
-}
-
-EXPORT_SYMBOL(free_irq);
-
-static DECLARE_MUTEX(probe_sem);
-
-/* Start the interrupt probing.  Unlike other architectures,
- * we don't return a mask of interrupts from probe_irq_on,
- * but return the number of interrupts enabled for the probe.
- * The interrupts which have been enabled for probing is
- * instead recorded in the irq_desc structure.
- */
-unsigned long probe_irq_on(void)
-{
-	unsigned int i, irqs = 0;
-	unsigned long delay;
-
-	down(&probe_sem);
-
-	/*
-	 * first snaffle up any unassigned but
-	 * probe-able interrupts
-	 */
-	spin_lock_irq(&irq_controller_lock);
-	for (i = 0; i < NR_IRQS; i++) {
-		if (!irq_desc[i].probe_ok || irq_desc[i].action)
-			continue;
-
-		irq_desc[i].probing = 1;
-		irq_desc[i].triggered = 0;
-		if (irq_desc[i].chip->set_type)
-			irq_desc[i].chip->set_type(i, IRQT_PROBE);
-		irq_desc[i].chip->unmask(i);
-		irqs += 1;
-	}
-	spin_unlock_irq(&irq_controller_lock);
-
-	/*
-	 * wait for spurious interrupts to mask themselves out again
-	 */
-	for (delay = jiffies + HZ/10; time_before(jiffies, delay); )
-		/* min 100ms delay */;
-
-	/*
-	 * now filter out any obviously spurious interrupts
-	 */
-	spin_lock_irq(&irq_controller_lock);
-	for (i = 0; i < NR_IRQS; i++) {
-		if (irq_desc[i].probing && irq_desc[i].triggered) {
-			irq_desc[i].probing = 0;
-			irqs -= 1;
-		}
-	}
-	spin_unlock_irq(&irq_controller_lock);
-
-	return irqs;
-}
-
-EXPORT_SYMBOL(probe_irq_on);
-
-unsigned int probe_irq_mask(unsigned long irqs)
-{
-	unsigned int mask = 0, i;
-
-	spin_lock_irq(&irq_controller_lock);
-	for (i = 0; i < 16 && i < NR_IRQS; i++)
-		if (irq_desc[i].probing && irq_desc[i].triggered)
-			mask |= 1 << i;
-	spin_unlock_irq(&irq_controller_lock);
-
-	up(&probe_sem);
-
-	return mask;
-}
-EXPORT_SYMBOL(probe_irq_mask);
-
-/*
- * Possible return values:
- *  >= 0 - interrupt number
- *    -1 - no interrupt/many interrupts
- */
-int probe_irq_off(unsigned long irqs)
-{
-	unsigned int i;
-	int irq_found = NO_IRQ;
-
-	/*
-	 * look at the interrupts, and find exactly one
-	 * that we were probing has been triggered
-	 */
-	spin_lock_irq(&irq_controller_lock);
-	for (i = 0; i < NR_IRQS; i++) {
-		if (irq_desc[i].probing &&
-		    irq_desc[i].triggered) {
-			if (irq_found != NO_IRQ) {
-				irq_found = NO_IRQ;
-				goto out;
-			}
-			irq_found = i;
-		}
-	}
-
-	if (irq_found == -1)
-		irq_found = NO_IRQ;
-out:
-	spin_unlock_irq(&irq_controller_lock);
-
-	up(&probe_sem);
-
-	return irq_found;
-}
-
-EXPORT_SYMBOL(probe_irq_off);
-
-#ifdef CONFIG_SMP
-static void route_irq(struct irqdesc *desc, unsigned int irq, unsigned int cpu)
-{
-	pr_debug("IRQ%u: moving from cpu%u to cpu%u\n", irq, desc->cpu, cpu);
-
-	spin_lock_irq(&irq_controller_lock);
-	desc->cpu = cpu;
-	desc->chip->set_cpu(desc, irq, cpu);
-	spin_unlock_irq(&irq_controller_lock);
-}
-
-#ifdef CONFIG_PROC_FS
-static int
-irq_affinity_read_proc(char *page, char **start, off_t off, int count,
-		       int *eof, void *data)
-{
-	struct irqdesc *desc = irq_desc + ((int)data);
-	int len = cpumask_scnprintf(page, count, desc->affinity);
-
-	if (count - len < 2)
-		return -EINVAL;
-	page[len++] = '\n';
-	page[len] = '\0';
-
-	return len;
-}
-
-static int
-irq_affinity_write_proc(struct file *file, const char __user *buffer,
-			unsigned long count, void *data)
-{
-	unsigned int irq = (unsigned int)data;
-	struct irqdesc *desc = irq_desc + irq;
-	cpumask_t affinity, tmp;
-	int ret = -EIO;
-
-	if (!desc->chip->set_cpu)
-		goto out;
-
-	ret = cpumask_parse(buffer, count, affinity);
-	if (ret)
-		goto out;
-
-	cpus_and(tmp, affinity, cpu_online_map);
-	if (cpus_empty(tmp)) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	desc->affinity = affinity;
-	route_irq(desc, irq, first_cpu(tmp));
-	ret = count;
-
- out:
-	return ret;
-}
-#endif
-#endif
-
-void __init init_irq_proc(void)
-{
-#if defined(CONFIG_SMP) && defined(CONFIG_PROC_FS)
-	struct proc_dir_entry *dir;
-	int irq;
-
-	dir = proc_mkdir("irq", NULL);
-	if (!dir)
-		return;
-
-	for (irq = 0; irq < NR_IRQS; irq++) {
-		struct proc_dir_entry *entry;
-		struct irqdesc *desc;
-		char name[16];
-
-		desc = irq_desc + irq;
-		memset(name, 0, sizeof(name));
-		snprintf(name, sizeof(name) - 1, "%u", irq);
-
-		desc->procdir = proc_mkdir(name, dir);
-		if (!desc->procdir)
-			continue;
-
-		entry = create_proc_entry("smp_affinity", 0600, desc->procdir);
-		if (entry) {
-			entry->nlink = 1;
-			entry->data = (void *)irq;
-			entry->read_proc = irq_affinity_read_proc;
-			entry->write_proc = irq_affinity_write_proc;
-		}
-	}
-#endif
+	spin_lock_irqsave(&desc->lock, flags);
+	desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
+	if (iflags & IRQF_VALID)
+		desc->status &= ~IRQ_NOREQUEST;
+	if (iflags & IRQF_PROBE)
+		desc->status &= ~IRQ_NOPROBE;
+	if (!(iflags & IRQF_NOAUTOEN))
+		desc->status &= ~IRQ_NOAUTOEN;
+	spin_unlock_irqrestore(&desc->lock, flags);
 }
 
 void __init init_IRQ(void)
 {
-	struct irqdesc *desc;
 	int irq;
 
+	for (irq = 0; irq < NR_IRQS; irq++)
+		irq_desc[irq].status |= IRQ_NOREQUEST | IRQ_DELAYED_DISABLE |
+			IRQ_NOPROBE;
+
 #ifdef CONFIG_SMP
 	bad_irq_desc.affinity = CPU_MASK_ALL;
 	bad_irq_desc.cpu = smp_processor_id();
 #endif
-
-	for (irq = 0, desc = irq_desc; irq < NR_IRQS; irq++, desc++) {
-		*desc = bad_irq_desc;
-		INIT_LIST_HEAD(&desc->pend);
-	}
-
 	init_arch_irq();
 }
 
-static int __init noirqdebug_setup(char *str)
-{
-	noirqdebug = 1;
-	return 1;
-}
-
-__setup("noirqdebug", noirqdebug_setup);
-
 #ifdef CONFIG_HOTPLUG_CPU
 /*
  * The CPU has been marked offline.  Migrate IRQs off this CPU.  If
diff --git a/arch/arm/mach-at91rm9200/at91rm9200_time.c b/arch/arm/mach-at91rm9200/at91rm9200_time.c
index dc38e06ada6..0aa22650a00 100644
--- a/arch/arm/mach-at91rm9200/at91rm9200_time.c
+++ b/arch/arm/mach-at91rm9200/at91rm9200_time.c
@@ -21,13 +21,13 @@
 
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/time.h>
 
 #include <asm/hardware.h>
 #include <asm/io.h>
-#include <asm/irq.h>
 #include <asm/mach/time.h>
 
 static unsigned long last_crtr;
diff --git a/arch/arm/mach-at91rm9200/gpio.c b/arch/arm/mach-at91rm9200/gpio.c
index 83c34747087..5783c282ae7 100644
--- a/arch/arm/mach-at91rm9200/gpio.c
+++ b/arch/arm/mach-at91rm9200/gpio.c
@@ -10,12 +10,13 @@
  */
 
 #include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/module.h>
 
 #include <asm/io.h>
-#include <asm/mach/irq.h>
 #include <asm/hardware.h>
 #include <asm/arch/gpio.h>
 
@@ -340,7 +341,7 @@ static void gpio_irq_handler(unsigned irq, struct irqdesc *desc, struct pt_regs
 	void __iomem	*pio;
 	u32		isr;
 
-	pio = desc->base;
+	pio = get_irq_chip_data(irq);
 
 	/* temporarily mask (level sensitive) parent IRQ */
 	desc->chip->ack(irq);
@@ -350,12 +351,12 @@ static void gpio_irq_handler(unsigned irq, struct irqdesc *desc, struct pt_regs
 		if (!isr)
 			break;
 
-		pin = (unsigned) desc->data;
+		pin = (unsigned) get_irq_data(irq);
 		gpio = &irq_desc[pin];
 
 		while (isr) {
 			if (isr & 1) {
-				if (unlikely(gpio->disable_depth)) {
+				if (unlikely(gpio->depth)) {
 					/*
 					 * The core ARM interrupt handler lazily disables IRQs so
 					 * another IRQ must be generated before it actually gets
@@ -364,7 +365,7 @@ static void gpio_irq_handler(unsigned irq, struct irqdesc *desc, struct pt_regs
 					gpio_irq_mask(pin);
 				}
 				else
-					gpio->handle(pin, gpio, regs);
+					desc_handle_irq(pin, gpio, regs);
 			}
 			pin++;
 			gpio++;
diff --git a/arch/arm/mach-clps711x/time.c b/arch/arm/mach-clps711x/time.c
index 1a23f0dcd4b..b0f1db258e8 100644
--- a/arch/arm/mach-clps711x/time.c
+++ b/arch/arm/mach-clps711x/time.c
@@ -19,6 +19,7 @@
 #include <linux/timex.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/sched.h>
 
 #include <asm/hardware.h>
diff --git a/arch/arm/mach-clps7500/core.c b/arch/arm/mach-clps7500/core.c
index 5b12cab0e69..cd66df89636 100644
--- a/arch/arm/mach-clps7500/core.c
+++ b/arch/arm/mach-clps7500/core.c
@@ -9,6 +9,7 @@
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/list.h>
 #include <linux/sched.h>
 #include <linux/init.h>
diff --git a/arch/arm/mach-footbridge/dc21285-timer.c b/arch/arm/mach-footbridge/dc21285-timer.c
index 14a62d6008f..e668d4acd80 100644
--- a/arch/arm/mach-footbridge/dc21285-timer.c
+++ b/arch/arm/mach-footbridge/dc21285-timer.c
@@ -6,6 +6,7 @@
  */
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 
 #include <asm/irq.h>
 
diff --git a/arch/arm/mach-footbridge/isa-timer.c b/arch/arm/mach-footbridge/isa-timer.c
index c1d74f7ab66..282b473c21f 100644
--- a/arch/arm/mach-footbridge/isa-timer.c
+++ b/arch/arm/mach-footbridge/isa-timer.c
@@ -6,6 +6,7 @@
  */
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
diff --git a/arch/arm/mach-imx/time.c b/arch/arm/mach-imx/time.c
index 294b1c450f2..5f9a04775a4 100644
--- a/arch/arm/mach-imx/time.c
+++ b/arch/arm/mach-imx/time.c
@@ -12,6 +12,7 @@
 #include <linux/sched.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/time.h>
 
 #include <asm/hardware.h>
diff --git a/arch/arm/mach-integrator/core.c b/arch/arm/mach-integrator/core.c
index 576a5e979c0..2d7e505e748 100644
--- a/arch/arm/mach-integrator/core.c
+++ b/arch/arm/mach-integrator/core.c
@@ -13,6 +13,7 @@
 #include <linux/device.h>
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/sched.h>
 #include <linux/smp.h>
 #include <linux/termios.h>
diff --git a/arch/arm/mach-ixp2000/core.c b/arch/arm/mach-ixp2000/core.c
index 3cfc5aab825..b31f31ac937 100644
--- a/arch/arm/mach-ixp2000/core.c
+++ b/arch/arm/mach-ixp2000/core.c
@@ -19,6 +19,7 @@
 #include <linux/spinlock.h>
 #include <linux/sched.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/serial.h>
 #include <linux/tty.h>
 #include <linux/bitops.h>
@@ -408,7 +409,7 @@ static void ixp2000_err_irq_handler(unsigned int irq, struct irqdesc *desc,  str
 	for(i = 31; i >= 0; i--) {
 		if(status & (1 << i)) {
 			desc = irq_desc + IRQ_IXP2000_DRAM0_MIN_ERR + i;
-			desc->handle(IRQ_IXP2000_DRAM0_MIN_ERR + i, desc, regs);
+			desc_handle_irq(IRQ_IXP2000_DRAM0_MIN_ERR + i, desc, regs);
 		}
 	}
 }
diff --git a/arch/arm/mach-ixp2000/ixdp2x00.c b/arch/arm/mach-ixp2000/ixdp2x00.c
index 9b8ded25980..40eef8b3674 100644
--- a/arch/arm/mach-ixp2000/ixdp2x00.c
+++ b/arch/arm/mach-ixp2000/ixdp2x00.c
@@ -167,7 +167,7 @@ void ixdp2x00_init_irq(volatile unsigned long *stat_reg, volatile unsigned long
 	}
 
 	/* Hook into PCI interrupt */
-	set_irq_chained_handler(IRQ_IXP2000_PCIB, &ixdp2x00_irq_handler);
+	set_irq_chained_handler(IRQ_IXP2000_PCIB, ixdp2x00_irq_handler);
 }
 
 /*************************************************************************
diff --git a/arch/arm/mach-ixp2000/ixdp2x01.c b/arch/arm/mach-ixp2000/ixdp2x01.c
index 8477ae1d8f7..7f42366f60d 100644
--- a/arch/arm/mach-ixp2000/ixdp2x01.c
+++ b/arch/arm/mach-ixp2000/ixdp2x01.c
@@ -127,7 +127,7 @@ void __init ixdp2x01_init_irq(void)
 	}
 
 	/* Hook into PCI interrupts */
-	set_irq_chained_handler(IRQ_IXP2000_PCIB, &ixdp2x01_irq_handler);
+	set_irq_chained_handler(IRQ_IXP2000_PCIB, ixdp2x01_irq_handler);
 }
 
 
diff --git a/arch/arm/mach-ixp23xx/core.c b/arch/arm/mach-ixp23xx/core.c
index 82ad6ef90a3..7c218aecf44 100644
--- a/arch/arm/mach-ixp23xx/core.c
+++ b/arch/arm/mach-ixp23xx/core.c
@@ -271,7 +271,7 @@ static void pci_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *
 	}
 
 	int_desc = irq_desc + irqno;
-	int_desc->handle(irqno, int_desc, regs);
+	desc_handle_irq(irqno, int_desc, regs);
 
 	desc->chip->unmask(irq);
 }
diff --git a/arch/arm/mach-ixp23xx/ixdp2351.c b/arch/arm/mach-ixp23xx/ixdp2351.c
index bba9d9f0869..37a32e6bcca 100644
--- a/arch/arm/mach-ixp23xx/ixdp2351.c
+++ b/arch/arm/mach-ixp23xx/ixdp2351.c
@@ -19,6 +19,7 @@
 #include <linux/spinlock.h>
 #include <linux/sched.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/serial.h>
 #include <linux/tty.h>
 #include <linux/bitops.h>
@@ -36,7 +37,6 @@
 #include <asm/memory.h>
 #include <asm/hardware.h>
 #include <asm/mach-types.h>
-#include <asm/irq.h>
 #include <asm/system.h>
 #include <asm/tlbflush.h>
 #include <asm/pgtable.h>
@@ -74,7 +74,7 @@ static void ixdp2351_inta_handler(unsigned int irq, struct irqdesc *desc, struct
 			int cpld_irq =
 				IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE + i);
 			cpld_desc = irq_desc + cpld_irq;
-			cpld_desc->handle(cpld_irq, cpld_desc, regs);
+			desc_handle_irq(cpld_irq, cpld_desc, regs);
 		}
 	}
 
@@ -111,7 +111,7 @@ static void ixdp2351_intb_handler(unsigned int irq, struct irqdesc *desc, struct
 			int cpld_irq =
 				IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE + i);
 			cpld_desc = irq_desc + cpld_irq;
-			cpld_desc->handle(cpld_irq, cpld_desc, regs);
+			desc_handle_irq(cpld_irq, cpld_desc, regs);
 		}
 	}
 
@@ -158,8 +158,8 @@ void ixdp2351_init_irq(void)
 		}
 	}
 
-	set_irq_chained_handler(IRQ_IXP23XX_INTA, &ixdp2351_inta_handler);
-	set_irq_chained_handler(IRQ_IXP23XX_INTB, &ixdp2351_intb_handler);
+	set_irq_chained_handler(IRQ_IXP23XX_INTA, ixdp2351_inta_handler);
+	set_irq_chained_handler(IRQ_IXP23XX_INTB, ixdp2351_intb_handler);
 }
 
 /*
diff --git a/arch/arm/mach-ixp4xx/coyote-pci.c b/arch/arm/mach-ixp4xx/coyote-pci.c
index e6b7fcd923f..2cebb287889 100644
--- a/arch/arm/mach-ixp4xx/coyote-pci.c
+++ b/arch/arm/mach-ixp4xx/coyote-pci.c
@@ -17,6 +17,7 @@
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/init.h>
+#include <linux/irq.h>
 
 #include <asm/mach-types.h>
 #include <asm/hardware.h>
diff --git a/arch/arm/mach-ixp4xx/ixdp425-pci.c b/arch/arm/mach-ixp4xx/ixdp425-pci.c
index 8b8ca80c944..d5156c043f0 100644
--- a/arch/arm/mach-ixp4xx/ixdp425-pci.c
+++ b/arch/arm/mach-ixp4xx/ixdp425-pci.c
@@ -17,6 +17,7 @@
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/init.h>
+#include <linux/irq.h>
 #include <linux/delay.h>
 
 #include <asm/mach/pci.h>
diff --git a/arch/arm/mach-ixp4xx/ixdpg425-pci.c b/arch/arm/mach-ixp4xx/ixdpg425-pci.c
index 526fb6175bc..ed527080021 100644
--- a/arch/arm/mach-ixp4xx/ixdpg425-pci.c
+++ b/arch/arm/mach-ixp4xx/ixdpg425-pci.c
@@ -16,10 +16,10 @@
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/init.h>
+#include <linux/irq.h>
 
 #include <asm/mach-types.h>
 #include <asm/hardware.h>
-#include <asm/irq.h>
 
 #include <asm/mach/pci.h>
 
diff --git a/arch/arm/mach-ixp4xx/nas100d-pci.c b/arch/arm/mach-ixp4xx/nas100d-pci.c
index 2d3b770d9e8..b8ebaf4a9c8 100644
--- a/arch/arm/mach-ixp4xx/nas100d-pci.c
+++ b/arch/arm/mach-ixp4xx/nas100d-pci.c
@@ -17,6 +17,7 @@
 
 #include <linux/pci.h>
 #include <linux/init.h>
+#include <linux/irq.h>
 
 #include <asm/mach/pci.h>
 #include <asm/mach-types.h>
diff --git a/arch/arm/mach-ixp4xx/nas100d-power.c b/arch/arm/mach-ixp4xx/nas100d-power.c
index a3745ed37f9..f58a1d05a02 100644
--- a/arch/arm/mach-ixp4xx/nas100d-power.c
+++ b/arch/arm/mach-ixp4xx/nas100d-power.c
@@ -17,9 +17,9 @@
  *
  */
 
-#include <linux/module.h>
-#include <linux/reboot.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/module.h>
 #include <linux/reboot.h>
 
 #include <asm/mach-types.h>
diff --git a/arch/arm/mach-l7200/core.c b/arch/arm/mach-l7200/core.c
index ac626436e96..b7af5640ea7 100644
--- a/arch/arm/mach-l7200/core.c
+++ b/arch/arm/mach-l7200/core.c
@@ -7,6 +7,7 @@
  */
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/irq.h>
 #include <linux/device.h>
 
 #include <asm/types.h>
diff --git a/arch/arm/mach-lh7a40x/arch-lpd7a40x.c b/arch/arm/mach-lh7a40x/arch-lpd7a40x.c
index c0e6854289f..35c3606a207 100644
--- a/arch/arm/mach-lh7a40x/arch-lpd7a40x.c
+++ b/arch/arm/mach-lh7a40x/arch-lpd7a40x.c
@@ -12,6 +12,7 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 
 #include <asm/hardware.h>
 #include <asm/setup.h>
diff --git a/arch/arm/mach-lh7a40x/time.c b/arch/arm/mach-lh7a40x/time.c
index 1919835d961..4d26c9f62c7 100644
--- a/arch/arm/mach-lh7a40x/time.c
+++ b/arch/arm/mach-lh7a40x/time.c
@@ -11,6 +11,7 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/time.h>
 
 #include <asm/hardware.h>
diff --git a/arch/arm/mach-omap1/board-osk.c b/arch/arm/mach-omap1/board-osk.c
index e0711d23a6b..91933301bb7 100644
--- a/arch/arm/mach-omap1/board-osk.c
+++ b/arch/arm/mach-omap1/board-osk.c
@@ -29,7 +29,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
-#include <linux/interrupt.h>
+#include <linux/irq.h>
 
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
diff --git a/arch/arm/mach-omap1/serial.c b/arch/arm/mach-omap1/serial.c
index 56319742aa1..5615fb8a3d5 100644
--- a/arch/arm/mach-omap1/serial.c
+++ b/arch/arm/mach-omap1/serial.c
@@ -11,6 +11,7 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/irq.h>
 #include <linux/delay.h>
 #include <linux/serial.h>
 #include <linux/tty.h>
diff --git a/arch/arm/mach-pxa/idp.c b/arch/arm/mach-pxa/idp.c
index 347b9dea24c..6914d22bc20 100644
--- a/arch/arm/mach-pxa/idp.c
+++ b/arch/arm/mach-pxa/idp.c
@@ -18,6 +18,7 @@
 
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/platform_device.h>
 #include <linux/fb.h>
 
diff --git a/arch/arm/mach-pxa/sharpsl_pm.c b/arch/arm/mach-pxa/sharpsl_pm.c
index 0f1648780c4..1e5e6ca693e 100644
--- a/arch/arm/mach-pxa/sharpsl_pm.c
+++ b/arch/arm/mach-pxa/sharpsl_pm.c
@@ -18,11 +18,11 @@
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/platform_device.h>
 
 #include <asm/hardware.h>
 #include <asm/mach-types.h>
-#include <asm/irq.h>
 #include <asm/apm.h>
 #include <asm/arch/pm.h>
 #include <asm/arch/pxa-regs.h>
diff --git a/arch/arm/mach-s3c2410/bast-irq.c b/arch/arm/mach-s3c2410/bast-irq.c
index fbbeb055300..def4441d244 100644
--- a/arch/arm/mach-s3c2410/bast-irq.c
+++ b/arch/arm/mach-s3c2410/bast-irq.c
@@ -136,8 +136,8 @@ bast_irq_pc104_demux(unsigned int irq,
 		for (i = 0; stat != 0; i++, stat >>= 1) {
 			if (stat & 1) {
 				irqno = bast_pc104_irqs[i];
-
-				desc_handle_irq(irqno, irq_desc + irqno, regs);
+				desc = irq_desc + irqno;
+				desc_handle_irq(irqno, desc, regs);
 			}
 		}
 	}
@@ -156,7 +156,7 @@ static __init int bast_irq_init(void)
 
 		set_irq_chained_handler(IRQ_ISA, bast_irq_pc104_demux);
 
-		/* reigster our IRQs */
+		/* register our IRQs */
 
 		for (i = 0; i < 4; i++) {
 			unsigned int irqno = bast_pc104_irqs[i];
diff --git a/arch/arm/mach-s3c2410/time.c b/arch/arm/mach-s3c2410/time.c
index 47387c5b972..c153c49c75d 100644
--- a/arch/arm/mach-s3c2410/time.c
+++ b/arch/arm/mach-s3c2410/time.c
@@ -22,6 +22,7 @@
 #include <linux/sched.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/err.h>
 #include <linux/clk.h>
 
diff --git a/arch/arm/mach-sa1100/cerf.c b/arch/arm/mach-sa1100/cerf.c
index e0f6d57b506..31afe50d7cd 100644
--- a/arch/arm/mach-sa1100/cerf.c
+++ b/arch/arm/mach-sa1100/cerf.c
@@ -14,6 +14,7 @@
 #include <linux/kernel.h>
 #include <linux/tty.h>
 #include <linux/platform_device.h>
+#include <linux/irq.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 
diff --git a/arch/arm/mach-sa1100/h3600.c b/arch/arm/mach-sa1100/h3600.c
index e727ba87b9f..e10d661c015 100644
--- a/arch/arm/mach-sa1100/h3600.c
+++ b/arch/arm/mach-sa1100/h3600.c
@@ -835,7 +835,7 @@ static void __init h3800_init_irq(void)
 	}
 #endif
 	set_irq_type(IRQ_GPIO_H3800_ASIC, IRQT_RISING);
-	set_irq_chained_handler(IRQ_GPIO_H3800_ASIC, &h3800_IRQ_demux);
+	set_irq_chained_handler(IRQ_GPIO_H3800_ASIC, h3800_IRQ_demux);
 }
 
 
diff --git a/arch/arm/mach-sa1100/irq.c b/arch/arm/mach-sa1100/irq.c
index b3a56024182..2891b8ca86d 100644
--- a/arch/arm/mach-sa1100/irq.c
+++ b/arch/arm/mach-sa1100/irq.c
@@ -11,12 +11,13 @@
  */
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/ioport.h>
 #include <linux/ptrace.h>
 #include <linux/sysdev.h>
 
 #include <asm/hardware.h>
-#include <asm/irq.h>
 #include <asm/mach/irq.h>
 
 #include "generic.h"
diff --git a/arch/arm/mach-sa1100/pleb.c b/arch/arm/mach-sa1100/pleb.c
index 0709ebab531..c7bf7e0038f 100644
--- a/arch/arm/mach-sa1100/pleb.c
+++ b/arch/arm/mach-sa1100/pleb.c
@@ -7,6 +7,7 @@
 #include <linux/tty.h>
 #include <linux/ioport.h>
 #include <linux/platform_device.h>
+#include <linux/irq.h>
 
 #include <linux/mtd/partitions.h>
 
diff --git a/arch/arm/mach-sa1100/time.c b/arch/arm/mach-sa1100/time.c
index e4b435e634e..688b1e109a4 100644
--- a/arch/arm/mach-sa1100/time.c
+++ b/arch/arm/mach-sa1100/time.c
@@ -11,6 +11,7 @@
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/timex.h>
 #include <linux/signal.h>
 
diff --git a/arch/arm/mach-shark/core.c b/arch/arm/mach-shark/core.c
index 877600e212d..2f2c6e97b7a 100644
--- a/arch/arm/mach-shark/core.c
+++ b/arch/arm/mach-shark/core.c
@@ -6,6 +6,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/sched.h>
 #include <linux/serial_8250.h>
 
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index c5d0214ef19..c2c05ef8634 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -24,9 +24,9 @@
 #include <linux/spinlock.h>
 #include <linux/errno.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 
 #include <asm/system.h>
-#include <asm/irq.h>
 #include <asm/hardware.h>
 #include <asm/dma.h>
 #include <asm/io.h>
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index ae08eeec7aa..cb0c21d384c 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -783,7 +783,7 @@ static void gpio_irq_handler(unsigned int irq, struct irqdesc *desc,
 
 	desc->chip->ack(irq);
 
-	bank = (struct gpio_bank *) desc->data;
+	bank = get_irq_data(irq);
 	if (bank->method == METHOD_MPUIO)
 		isr_reg = bank->base + OMAP_MPUIO_GPIO_INT;
 #ifdef CONFIG_ARCH_OMAP15XX
diff --git a/drivers/input/touchscreen/corgi_ts.c b/drivers/input/touchscreen/corgi_ts.c
index d2f9759cd3e..9b66271d3ba 100644
--- a/drivers/input/touchscreen/corgi_ts.c
+++ b/drivers/input/touchscreen/corgi_ts.c
@@ -17,7 +17,7 @@
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/slab.h>
-//#include <asm/irq.h>
+#include <linux/irq.h>
 
 #include <asm/arch/sharpsl.h>
 #include <asm/arch/hardware.h>
diff --git a/drivers/pcmcia/soc_common.c b/drivers/pcmcia/soc_common.c
index 888358fac59..ecaa132fa59 100644
--- a/drivers/pcmcia/soc_common.c
+++ b/drivers/pcmcia/soc_common.c
@@ -38,12 +38,12 @@
 #include <linux/timer.h>
 #include <linux/mm.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/spinlock.h>
 #include <linux/cpufreq.h>
 
 #include <asm/hardware.h>
 #include <asm/io.h>
-#include <asm/irq.h>
 #include <asm/system.h>
 
 #include "soc_common.h"
diff --git a/include/asm-arm/dyntick.h b/include/asm-arm/dyntick.h
new file mode 100644
index 00000000000..19fab2d2b76
--- /dev/null
+++ b/include/asm-arm/dyntick.h
@@ -0,0 +1,6 @@
+#ifndef _ASMARM_DYNTICK_H
+#define _ASMARM_DYNTICK_H
+
+#include <asm/mach/time.h>
+
+#endif /* _ASMARM_DYNTICK_H */
diff --git a/include/asm-arm/hw_irq.h b/include/asm-arm/hw_irq.h
new file mode 100644
index 00000000000..f1a08a50060
--- /dev/null
+++ b/include/asm-arm/hw_irq.h
@@ -0,0 +1,9 @@
+/*
+ * Nothing to see here yet
+ */
+#ifndef _ARCH_ARM_HW_IRQ_H
+#define _ARCH_ARM_HW_IRQ_H
+
+#include <asm/mach/irq.h>
+
+#endif
diff --git a/include/asm-arm/irq.h b/include/asm-arm/irq.h
index 66e67e60bc5..283af50a16c 100644
--- a/include/asm-arm/irq.h
+++ b/include/asm-arm/irq.h
@@ -21,18 +21,13 @@
 
 struct irqaction;
 
-extern void disable_irq_nosync(unsigned int);
-extern void disable_irq(unsigned int);
-extern void enable_irq(unsigned int);
-
 /*
- * These correspond with the SA_TRIGGER_* defines, and therefore the
- * IORESOURCE_IRQ_* defines.
+ * Migration helpers
  */
-#define __IRQT_RISEDGE	(1 << 0)
-#define __IRQT_FALEDGE	(1 << 1)
-#define __IRQT_HIGHLVL	(1 << 2)
-#define __IRQT_LOWLVL	(1 << 3)
+#define __IRQT_FALEDGE	IRQ_TYPE_EDGE_FALLING
+#define __IRQT_RISEDGE	IRQ_TYPE_EDGE_RISING
+#define __IRQT_LOWLVL	IRQ_TYPE_LEVEL_LOW
+#define __IRQT_HIGHLVL	IRQ_TYPE_LEVEL_HIGH
 
 #define IRQT_NOEDGE	(0)
 #define IRQT_RISING	(__IRQT_RISEDGE)
@@ -40,12 +35,7 @@ extern void enable_irq(unsigned int);
 #define IRQT_BOTHEDGE	(__IRQT_RISEDGE|__IRQT_FALEDGE)
 #define IRQT_LOW	(__IRQT_LOWLVL)
 #define IRQT_HIGH	(__IRQT_HIGHLVL)
-#define IRQT_PROBE	(1 << 4)
-
-int set_irq_type(unsigned int irq, unsigned int type);
-void disable_irq_wake(unsigned int irq);
-void enable_irq_wake(unsigned int irq);
-int setup_irq(unsigned int, struct irqaction *);
+#define IRQT_PROBE	IRQ_TYPE_PROBE
 
 extern void migrate_irqs(void);
 #endif
diff --git a/include/asm-arm/mach/irq.h b/include/asm-arm/mach/irq.h
index d4d420ecf3a..131f33733d2 100644
--- a/include/asm-arm/mach/irq.h
+++ b/include/asm-arm/mach/irq.h
@@ -10,95 +10,9 @@
 #ifndef __ASM_ARM_MACH_IRQ_H
 #define __ASM_ARM_MACH_IRQ_H
 
-struct irqdesc;
-struct pt_regs;
-struct seq_file;
-
-typedef void (*irq_handler_t)(unsigned int, struct irqdesc *, struct pt_regs *);
-typedef void (*irq_control_t)(unsigned int);
-
-struct irqchip {
-	/*
-	 * Acknowledge the IRQ.
-	 * If this is a level-based IRQ, then it is expected to mask the IRQ
-	 * as well.
-	 */
-	void (*ack)(unsigned int);
-	/*
-	 * Mask the IRQ in hardware.
-	 */
-	void (*mask)(unsigned int);
-	/*
-	 * Unmask the IRQ in hardware.
-	 */
-	void (*unmask)(unsigned int);
-	/*
-	 * Ask the hardware to re-trigger the IRQ.
-	 * Note: This method _must_ _not_ call the interrupt handler.
-	 * If you are unable to retrigger the interrupt, do not
-	 * provide a function, or if you do, return non-zero.
-	 */
-	int (*retrigger)(unsigned int);
-	/*
-	 * Set the type of the IRQ.
-	 */
-	int (*set_type)(unsigned int, unsigned int);
-	/*
-	 * Set wakeup-enable on the selected IRQ
-	 */
-	int (*set_wake)(unsigned int, unsigned int);
-
-#ifdef CONFIG_SMP
-	/*
-	 * Route an interrupt to a CPU
-	 */
-	void (*set_cpu)(struct irqdesc *desc, unsigned int irq, unsigned int cpu);
-#endif
-};
-
-struct irqdesc {
-	irq_handler_t	handle;
-	struct irqchip	*chip;
-	struct irqaction *action;
-	struct list_head pend;
-	void __iomem	*base;
-	void		*data;
-	unsigned int	disable_depth;
-
-	unsigned int	triggered: 1;		/* IRQ has occurred	      */
-	unsigned int	running  : 1;		/* IRQ is running             */
-	unsigned int	pending  : 1;		/* IRQ is pending	      */
-	unsigned int	probing  : 1;		/* IRQ in use for a probe     */
-	unsigned int	probe_ok : 1;		/* IRQ can be used for probe  */
-	unsigned int	valid    : 1;		/* IRQ claimable	      */
-	unsigned int	noautoenable : 1;	/* don't automatically enable IRQ */
-	unsigned int	unused   :25;
-
-	unsigned int	irqs_unhandled;
-	struct proc_dir_entry *procdir;
-
-#ifdef CONFIG_SMP
-	cpumask_t	affinity;
-	unsigned int	cpu;
-#endif
-
-	/*
-	 * IRQ lock detection
-	 */
-	unsigned int	lck_cnt;
-	unsigned int	lck_pc;
-	unsigned int	lck_jif;
-};
-
-extern struct irqdesc irq_desc[];
+#include <linux/irq.h>
 
-/*
- * Helpful inline function for calling irq descriptor handlers.
- */
-static inline void desc_handle_irq(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
-{
-	desc->handle(irq, desc, regs);
-}
+struct seq_file;
 
 /*
  * This is internal.  Do not use it.
@@ -106,18 +20,22 @@ static inline void desc_handle_irq(unsigned int irq, struct irqdesc *desc, struc
 extern void (*init_arch_irq)(void);
 extern void init_FIQ(void);
 extern int show_fiq_list(struct seq_file *, void *);
-void __set_irq_handler(unsigned int irq, irq_handler_t, int);
 
 /*
- * External stuff.
+ * Function wrappers
+ */
+#define set_irq_chipdata(irq, d)	set_irq_chip_data(irq, d)
+#define get_irq_chipdata(irq)		get_irq_chip_data(irq)
+
+/*
+ * Obsolete inline function for calling irq descriptor handlers.
  */
-#define set_irq_handler(irq,handler)		__set_irq_handler(irq,handler,0)
-#define set_irq_chained_handler(irq,handler)	__set_irq_handler(irq,handler,1)
-#define set_irq_data(irq,d)			do { irq_desc[irq].data = d; } while (0)
-#define set_irq_chipdata(irq,d)			do { irq_desc[irq].base = d; } while (0)
-#define get_irq_chipdata(irq)			(irq_desc[irq].base)
+static inline void desc_handle_irq(unsigned int irq, struct irq_desc *desc,
+				   struct pt_regs *regs)
+{
+	desc->handle_irq(irq, desc, regs);
+}
 
-void set_irq_chip(unsigned int irq, struct irqchip *);
 void set_irq_flags(unsigned int irq, unsigned int flags);
 
 #define IRQF_VALID	(1 << 0)
@@ -125,12 +43,25 @@ void set_irq_flags(unsigned int irq, unsigned int flags);
 #define IRQF_NOAUTOEN	(1 << 2)
 
 /*
- * Built-in IRQ handlers.
+ * This is for easy migration, but should be changed in the source
  */
-void do_level_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs);
-void do_edge_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs);
-void do_simple_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs);
-void do_bad_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs);
-void dummy_mask_unmask_irq(unsigned int irq);
+#define do_level_IRQ	handle_level_irq
+#define do_edge_IRQ	handle_edge_irq
+#define do_simple_IRQ	handle_simple_irq
+#define irqdesc		irq_desc
+#define irqchip		irq_chip
+
+#define do_bad_IRQ(irq,desc,regs)			\
+do {							\
+	spin_lock(&desc->lock);				\
+	handle_bad_irq(irq, desc, regs);		\
+	spin_unlock(&desc->lock);			\
+} while(0)
+
+extern unsigned long irq_err_count;
+static inline void ack_bad_irq(int irq)
+{
+	irq_err_count++;
+}
 
 #endif
diff --git a/include/linux/irq.h b/include/linux/irq.h
index ae1e422f18e..95d7aa7954d 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -347,8 +347,9 @@ extern int noirqdebug_setup(char *str);
 /* Checks whether the interrupt can be requested by request_irq(): */
 extern int can_request_irq(unsigned int irq, unsigned long irqflags);
 
-/* Dummy irq-chip implementation: */
+/* Dummy irq-chip implementations: */
 extern struct irq_chip no_irq_chip;
+extern struct irq_chip dummy_irq_chip;
 
 extern void
 set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip,
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 4a0952d9458..54105bdfe20 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -462,9 +462,18 @@ __set_irq_handler(unsigned int irq,
 	if (!handle)
 		handle = handle_bad_irq;
 
-	if (is_chained && desc->chip == &no_irq_chip)
-		printk(KERN_WARNING "Trying to install "
-		       "chained interrupt type for IRQ%d\n", irq);
+	if (desc->chip == &no_irq_chip) {
+		printk(KERN_WARNING "Trying to install %sinterrupt handler "
+		       "for IRQ%d\n", is_chained ? "chained " : " ", irq);
+		/*
+		 * Some ARM implementations install a handler for really dumb
+		 * interrupt hardware without setting an irq_chip. This worked
+		 * with the ARM no_irq_chip but the check in setup_irq would
+		 * prevent us to setup the interrupt at all. Switch it to
+		 * dummy_irq_chip for easy transition.
+		 */
+		desc->chip = &dummy_irq_chip;
+	}
 
 	spin_lock_irqsave(&desc->lock, flags);
 
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 6070e046469..6d8b3011496 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -16,6 +16,10 @@
 #include <linux/interrupt.h>
 #include <linux/kernel_stat.h>
 
+#if defined(CONFIG_NO_IDLE_HZ) && defined(CONFIG_ARM)
+#include <asm/dyntick.h>
+#endif
+
 #include "internals.h"
 
 /**
@@ -92,6 +96,22 @@ struct irq_chip no_irq_chip = {
 };
 
 /*
+ * Generic dummy implementation which can be used for
+ * real dumb interrupt sources
+ */
+struct irq_chip dummy_irq_chip = {
+	.name		= "dummy",
+	.startup	= noop_ret,
+	.shutdown	= noop,
+	.enable		= noop,
+	.disable	= noop,
+	.ack		= noop,
+	.mask		= noop,
+	.unmask		= noop,
+	.end		= noop,
+};
+
+/*
  * Special, empty irq handler:
  */
 irqreturn_t no_action(int cpl, void *dev_id, struct pt_regs *regs)
@@ -113,6 +133,15 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
 	irqreturn_t ret, retval = IRQ_NONE;
 	unsigned int status = 0;
 
+#if defined(CONFIG_NO_IDLE_HZ) && defined(CONFIG_ARM)
+	if (!(action->flags & SA_TIMER) && system_timer->dyn_tick != NULL) {
+		write_seqlock(&xtime_lock);
+		if (system_timer->dyn_tick->state & DYN_TICK_ENABLED)
+			system_timer->dyn_tick->handler(irq, 0, regs);
+		write_sequnlock(&xtime_lock);
+	}
+#endif
+
 	if (!(action->flags & IRQF_DISABLED))
 		local_irq_enable();