parisc: lay groundwork for killing __do_IRQ

Use proper accessors and handlers for generic irq cleanups. We just
call back into __do_IRQ through desc->handler now, and remove the
explicit calls.
Signed-off-by: Kyle McMartin <kyle@redhat.com>

arch/parisc/include/asm/irq.h

@@ -32,6 +32,9 @@ static __inline__ int irq_canonicalize(int irq)
 }
 
 struct irq_chip;
+struct irq_desc;
+
+extern void parisc_do_IRQ(unsigned int irq, struct irq_desc *desc);
 
 /*
  * Some useful "we don't have to do anything here" handlers.  Should

arch/parisc/kernel/irq.c

@@ -151,7 +151,7 @@ static struct irq_chip cpu_interrupt_type = {
 	.enable		= cpu_enable_irq,
 	.disable	= cpu_disable_irq,
 	.ack		= cpu_ack_irq,
-	.end		= cpu_end_irq,
+	.eoi		= cpu_end_irq,
 #ifdef CONFIG_SMP
 	.set_affinity	= cpu_set_affinity_irq,
 #endif
@@ -247,10 +247,11 @@ int cpu_claim_irq(unsigned int irq, struct irq_chip *type, void *data)
 	if (irq_desc[irq].chip != &cpu_interrupt_type)
 		return -EBUSY;
 
+	/* for iosapic interrupts */
 	if (type) {
-		irq_desc[irq].chip = type;
-		irq_desc[irq].chip_data = data;
-		cpu_interrupt_type.enable(irq);
+		set_irq_chip_and_handler(irq, type, parisc_do_IRQ);
+		set_irq_chip_data(irq, data);
+		cpu_enable_irq(irq);
 	}
 	return 0;
 }
@@ -368,7 +369,7 @@ void do_cpu_irq_mask(struct pt_regs *regs)
 		goto set_out;
 	}
 #endif
-	__do_IRQ(irq);
+	generic_handle_irq(irq);
 
  out:
 	irq_exit();
@@ -398,14 +399,14 @@ static void claim_cpu_irqs(void)
 {
 	int i;
 	for (i = CPU_IRQ_BASE; i <= CPU_IRQ_MAX; i++) {
-		irq_desc[i].chip = &cpu_interrupt_type;
+		set_irq_chip_and_handler(i, &cpu_interrupt_type, parisc_do_IRQ);
 	}
 
-	irq_desc[TIMER_IRQ].action = &timer_action;
-	irq_desc[TIMER_IRQ].status = IRQ_PER_CPU;
+	set_irq_handler(TIMER_IRQ, handle_percpu_irq);
+	setup_irq(TIMER_IRQ, &timer_action);
 #ifdef CONFIG_SMP
-	irq_desc[IPI_IRQ].action = &ipi_action;
-	irq_desc[IPI_IRQ].status = IRQ_PER_CPU;
+	set_irq_handler(IPI_IRQ, handle_percpu_irq);
+	setup_irq(IPI_IRQ, &ipi_action);
 #endif
 }
 
@@ -423,3 +424,8 @@ void __init init_IRQ(void)
         set_eiem(cpu_eiem);	/* EIEM : enable all external intr */
 
 }
+
+void parisc_do_IRQ(unsigned int irq, struct irq_desc *desc)
+{
+	__do_IRQ(irq);
+}

drivers/parisc/dino.c

@@ -298,8 +298,7 @@ static struct pci_port_ops dino_port_ops = {
 
 static void dino_disable_irq(unsigned int irq)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
-	struct dino_device *dino_dev = desc->chip_data;
+	struct dino_device *dino_dev = get_irq_chip_data(irq);
 	int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
 
 	DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, irq);
@@ -311,8 +310,7 @@ static void dino_disable_irq(unsigned int irq)
 
 static void dino_enable_irq(unsigned int irq)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
-	struct dino_device *dino_dev = desc->chip_data;
+	struct dino_device *dino_dev = get_irq_chip_data(irq);
 	int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
 	u32 tmp;
 
@@ -391,7 +389,7 @@ static irqreturn_t dino_isr(int irq, void *intr_dev)
 		int irq = dino_dev->global_irq[local_irq];
 		DBG(KERN_DEBUG "%s(%d, %p) mask 0x%x\n",
 			__func__, irq, intr_dev, mask);
-		__do_IRQ(irq);
+		generic_handle_irq(irq);
 		mask &= ~(1 << local_irq);
 	} while (mask);
 

drivers/parisc/eisa.c

@@ -233,7 +233,7 @@ static irqreturn_t eisa_irq(int wax_irq, void *intr_dev)
 	}
 	spin_unlock_irqrestore(&eisa_irq_lock, flags);
 
-	__do_IRQ(irq);
+	generic_handle_irq(irq);
    
 	spin_lock_irqsave(&eisa_irq_lock, flags);
 	/* unmask */
@@ -346,10 +346,10 @@ static int __init eisa_probe(struct parisc_device *dev)
 	}
 	
 	/* Reserve IRQ2 */
-	irq_to_desc(2)->action = &irq2_action;
-	
+	setup_irq(2, &irq2_action);
 	for (i = 0; i < 16; i++) {
-		irq_to_desc(i)->chip = &eisa_interrupt_type;
+		set_irq_chip_and_handler(i, &eisa_interrupt_type,
+			parisc_do_IRQ);
 	}
 	
 	EISA_bus = 1;

drivers/parisc/gsc.c

@@ -86,7 +86,7 @@ irqreturn_t gsc_asic_intr(int gsc_asic_irq, void *dev)
 	do {
 		int local_irq = __ffs(irr);
 		unsigned int irq = gsc_asic->global_irq[local_irq];
-		__do_IRQ(irq);
+		generic_handle_irq(irq);
 		irr &= ~(1 << local_irq);
 	} while (irr);
 
@@ -107,8 +107,7 @@ int gsc_find_local_irq(unsigned int irq, int *global_irqs, int limit)
 
 static void gsc_asic_disable_irq(unsigned int irq)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
-	struct gsc_asic *irq_dev = desc->chip_data;
+	struct gsc_asic *irq_dev = get_irq_chip_data(irq);
 	int local_irq = gsc_find_local_irq(irq, irq_dev->global_irq, 32);
 	u32 imr;
 
@@ -123,8 +122,7 @@ static void gsc_asic_disable_irq(unsigned int irq)
 
 static void gsc_asic_enable_irq(unsigned int irq)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
-	struct gsc_asic *irq_dev = desc->chip_data;
+	struct gsc_asic *irq_dev = get_irq_chip_data(irq);
 	int local_irq = gsc_find_local_irq(irq, irq_dev->global_irq, 32);
 	u32 imr;
 
@@ -160,14 +158,13 @@ static struct irq_chip gsc_asic_interrupt_type = {
 int gsc_assign_irq(struct irq_chip *type, void *data)
 {
 	static int irq = GSC_IRQ_BASE;
-	struct irq_desc *desc;
 
 	if (irq > GSC_IRQ_MAX)
 		return NO_IRQ;
 
-	desc = irq_to_desc(irq);
-	desc->chip = type;
-	desc->chip_data = data;
+	set_irq_chip_and_handler(irq, type, parisc_do_IRQ);
+	set_irq_chip_data(irq, data);
+
 	return irq++;
 }
 

drivers/parisc/iosapic.c

@@ -615,17 +615,10 @@ iosapic_set_irt_data( struct vector_info *vi, u32 *dp0, u32 *dp1)
 }
 
 
-static struct vector_info *iosapic_get_vector(unsigned int irq)
-{
-	struct irq_desc *desc = irq_to_desc(irq);
-
-	return desc->chip_data;
-}
-
 static void iosapic_disable_irq(unsigned int irq)
 {
 	unsigned long flags;
-	struct vector_info *vi = iosapic_get_vector(irq);
+	struct vector_info *vi = get_irq_chip_data(irq);
 	u32 d0, d1;
 
 	spin_lock_irqsave(&iosapic_lock, flags);
@@ -637,7 +630,7 @@ static void iosapic_disable_irq(unsigned int irq)
 
 static void iosapic_enable_irq(unsigned int irq)
 {
-	struct vector_info *vi = iosapic_get_vector(irq);
+	struct vector_info *vi = get_irq_chip_data(irq);
 	u32 d0, d1;
 
 	/* data is initialized by fixup_irq */
@@ -688,7 +681,7 @@ printk("\n");
  */
 static void iosapic_end_irq(unsigned int irq)
 {
-	struct vector_info *vi = iosapic_get_vector(irq);
+	struct vector_info *vi = get_irq_chip_data(irq);
 	DBG(KERN_DEBUG "end_irq(%d): eoi(%p, 0x%x)\n", irq,
 			vi->eoi_addr, vi->eoi_data);
 	iosapic_eoi(vi->eoi_addr, vi->eoi_data);
@@ -705,7 +698,7 @@ static unsigned int iosapic_startup_irq(unsigned int irq)
 static int iosapic_set_affinity_irq(unsigned int irq,
 				     const struct cpumask *dest)
 {
-	struct vector_info *vi = iosapic_get_vector(irq);
+	struct vector_info *vi = get_irq_chip_data(irq);
 	u32 d0, d1, dummy_d0;
 	unsigned long flags;
 	int dest_cpu;

drivers/parisc/superio.c

@@ -139,7 +139,7 @@ superio_interrupt(int parent_irq, void *devp)
 	}
 
 	/* Call the appropriate device's interrupt */
-	__do_IRQ(local_irq);
+	generic_handle_irq(local_irq);
 
 	/* set EOI - forces a new interrupt if a lower priority device
 	 * still needs service.
@@ -363,9 +363,7 @@ int superio_fixup_irq(struct pci_dev *pcidev)
 #endif
 
 	for (i = 0; i < 16; i++) {
-		struct irq_desc *desc = irq_to_desc(i);
-
-		desc->chip = &superio_interrupt_type;
+		set_irq_chip_and_handler(i, &superio_interrupt_type, parisc_do_IRQ);
 	}
 
 	/*