5 files changed, 48 insertions, 55 deletions

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index d96d6f687c48..4895fde4eb93 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -24,11 +24,9 @@
  */
 void dynamic_irq_init(unsigned int irq)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
 
-        /* first time to use this irq_desc */
-        desc = irq_to_desc(irq);
         if (!desc) {
                 WARN(1, KERN_ERR "Trying to initialize invalid IRQ%d\n", irq);
                 return;
@@ -58,10 +56,9 @@ void dynamic_irq_init(unsigned int irq)
  */
 void dynamic_irq_cleanup(unsigned int irq)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
 
-        desc = irq_to_desc(irq);
         if (!desc) {
                 WARN(1, KERN_ERR "Trying to cleanup invalid IRQ%d\n", irq);
                 return;
@@ -90,10 +87,9 @@ void dynamic_irq_cleanup(unsigned int irq)
  */
 int set_irq_chip(unsigned int irq, struct irq_chip *chip)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
 
-        desc = irq_to_desc(irq);
         if (!desc) {
                 WARN(1, KERN_ERR "Trying to install chip for IRQ%d\n", irq);
                 return -EINVAL;
@@ -118,11 +114,10 @@ EXPORT_SYMBOL(set_irq_chip);
  */
 int set_irq_type(unsigned int irq, unsigned int type)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
         int ret = -ENXIO;
 
-        desc = irq_to_desc(irq);
         if (!desc) {
                 printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq);
                 return -ENODEV;
@@ -147,10 +142,9 @@ EXPORT_SYMBOL(set_irq_type);
  */
 int set_irq_data(unsigned int irq, void *data)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
 
-        desc = irq_to_desc(irq);
         if (!desc) {
                 printk(KERN_ERR
                        "Trying to install controller data for IRQ%d\n", irq);
@@ -173,10 +167,9 @@ EXPORT_SYMBOL(set_irq_data);
  */
 int set_irq_msi(unsigned int irq, struct msi_desc *entry)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
 
-        desc = irq_to_desc(irq);
         if (!desc) {
                 printk(KERN_ERR
                        "Trying to install msi data for IRQ%d\n", irq);
@@ -200,10 +193,9 @@ int set_irq_msi(unsigned int irq, struct msi_desc *entry)
  */
 int set_irq_chip_data(unsigned int irq, void *data)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
 
-        desc = irq_to_desc(irq);
         if (!desc) {
                 printk(KERN_ERR
                        "Trying to install chip data for IRQ%d\n", irq);
@@ -228,9 +220,8 @@ EXPORT_SYMBOL(set_irq_chip_data);
  */
 static void default_enable(unsigned int irq)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
 
-        desc = irq_to_desc(irq);
         desc->chip->unmask(irq);
         desc->status &= ~IRQ_MASKED;
 }
@@ -247,11 +238,9 @@ static void default_disable(unsigned int irq)
  */
 static unsigned int default_startup(unsigned int irq)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
 
-        desc = irq_to_desc(irq);
         desc->chip->enable(irq);
-
         return 0;
 }
 
@@ -260,9 +249,8 @@ static unsigned int default_startup(unsigned int irq)
  */
 static void default_shutdown(unsigned int irq)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
 
-        desc = irq_to_desc(irq);
         desc->chip->mask(irq);
         desc->status |= IRQ_MASKED;
 }
@@ -550,10 +538,9 @@ void
 __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
                   const char *name)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
 
-        desc = irq_to_desc(irq);
         if (!desc) {
                 printk(KERN_ERR
                        "Trying to install type control for IRQ%d\n", irq);
@@ -614,13 +601,11 @@ set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
 
 void __init set_irq_noprobe(unsigned int irq)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
 
-        desc = irq_to_desc(irq);
         if (!desc) {
                 printk(KERN_ERR "Trying to mark IRQ%d non-probeable\n", irq);
-
                 return;
         }
 
@@ -631,13 +616,11 @@ void __init set_irq_noprobe(unsigned int irq)
 
 void __init set_irq_probe(unsigned int irq)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
 
-        desc = irq_to_desc(irq);
         if (!desc) {
                 printk(KERN_ERR "Trying to mark IRQ%d probeable\n", irq);
-
                 return;
         }
 
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 9fe86b3a60a5..a69368ff607f 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -68,9 +68,8 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
  */
 static void ack_bad(unsigned int irq)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
 
-        desc = irq_to_desc(irq);
         print_irq_desc(irq, desc);
         ack_bad_irq(irq);
 }
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index ad2ce72c83c4..c498a1b8c621 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -140,10 +140,9 @@ int irq_select_affinity(unsigned int irq)
  */
 void disable_irq_nosync(unsigned int irq)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
 
-        desc = irq_to_desc(irq);
         if (!desc)
                 return;
 
@@ -170,9 +169,8 @@ EXPORT_SYMBOL(disable_irq_nosync);
  */
 void disable_irq(unsigned int irq)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
 
-        desc = irq_to_desc(irq);
         if (!desc)
                 return;
 
@@ -213,10 +211,9 @@ static void __enable_irq(struct irq_desc *desc, unsigned int irq)
  */
 void enable_irq(unsigned int irq)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
 
-        desc = irq_to_desc(irq);
         if (!desc)
                 return;
 
@@ -291,10 +288,9 @@ EXPORT_SYMBOL(set_irq_wake);
  */
 int can_request_irq(unsigned int irq, unsigned long irqflags)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         struct irqaction *action;
 
-        desc = irq_to_desc(irq);
         if (!desc)
                 return 0;
 
@@ -355,16 +351,15 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
  * Internal function to register an irqaction - typically used to
  * allocate special interrupts that are part of the architecture.
  */
-int setup_irq(unsigned int irq, struct irqaction *new)
+static int
+__setup_irq(unsigned int irq, struct irq_desc * desc, struct irqaction *new)
 {
-        struct irq_desc *desc;
         struct irqaction *old, **p;
         const char *old_name = NULL;
         unsigned long flags;
         int shared = 0;
         int ret;
 
-        desc = irq_to_desc(irq);
         if (!desc)
                 return -EINVAL;
 
@@ -504,6 +499,20 @@ mismatch:
 }
 
 /**
+ *      setup_irq - setup an interrupt
+ *      @irq: Interrupt line to setup
+ *      @act: irqaction for the interrupt
+ *
+ * Used to statically setup interrupts in the early boot process.
+ */
+int setup_irq(unsigned int irq, struct irqaction *act)
+{
+        struct irq_desc *desc = irq_to_desc(irq);
+
+        return __setup_irq(irq, desc, act);
+}
+
+/**
  *      free_irq - free an interrupt
  *      @irq: Interrupt line to free
  *      @dev_id: Device identity to free
@@ -519,13 +528,12 @@ mismatch:
  */
 void free_irq(unsigned int irq, void *dev_id)
 {
-        struct irq_desc *desc;
+        struct irq_desc *desc = irq_to_desc(irq);
         struct irqaction **p;
         unsigned long flags;
 
         WARN_ON(in_interrupt());
 
-        desc = irq_to_desc(irq);
         if (!desc)
                 return;
 
@@ -624,8 +632,8 @@ int request_irq(unsigned int irq, irq_handler_t handler,
                 unsigned long irqflags, const char *devname, void *dev_id)
 {
         struct irqaction *action;
-        int retval;
         struct irq_desc *desc;
+        int retval;
 
 #ifdef CONFIG_LOCKDEP
         /*
@@ -662,7 +670,7 @@ int request_irq(unsigned int irq, irq_handler_t handler,
         action->next = NULL;
         action->dev_id = dev_id;
 
-        retval = setup_irq(irq, action);
+        retval = __setup_irq(irq, desc, action);
         if (retval)
                 kfree(action);
 
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index bc0993d86c8b..fac014a81b24 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -215,6 +215,7 @@ void unregister_handler_proc(unsigned int irq, struct irqaction *action)
 {
         if (action->dir) {
                 struct irq_desc *desc = irq_to_desc(irq);
+
                 remove_proc_entry(action->dir->name, desc->dir);
         }
 }
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index ec5a4bef3054..dd364c11e56e 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -26,8 +26,7 @@ static DEFINE_TIMER(poll_spurious_irq_timer, poll_spurious_irqs, 0, 0);
 static int try_one_irq(int irq, struct irq_desc *desc)
 {
         struct irqaction *action;
-        int ok = 0;
-        int work = 0;   /* Did we do work for a real IRQ */
+        int ok = 0, work = 0;
 
         spin_lock(&desc->lock);
         /* Already running on another processor */
@@ -88,9 +87,8 @@ static int try_one_irq(int irq, struct irq_desc *desc)
 
 static int misrouted_irq(int irq)
 {
-        int i;
-        int ok = 0;
         struct irq_desc *desc;
+        int i, ok = 0;
 
         for_each_irq_desc(i, desc) {
                 if (!i)
@@ -108,8 +106,8 @@ static int misrouted_irq(int irq)
 
 static void poll_spurious_irqs(unsigned long dummy)
 {
-        int i;
         struct irq_desc *desc;
+        int i;
 
         for_each_irq_desc(i, desc) {
                 unsigned int status;
@@ -126,7 +124,8 @@ static void poll_spurious_irqs(unsigned long dummy)
                 try_one_irq(i, desc);
         }
 
-        mod_timer(&poll_spurious_irq_timer, jiffies + POLL_SPURIOUS_IRQ_INTERVAL);
+        mod_timer(&poll_spurious_irq_timer,
+                  jiffies + POLL_SPURIOUS_IRQ_INTERVAL);
 }
 
 /*
@@ -177,7 +176,9 @@ report_bad_irq(unsigned int irq, struct irq_desc *desc, irqreturn_t action_ret)
         }
 }
 
-static inline int try_misrouted_irq(unsigned int irq, struct irq_desc *desc, irqreturn_t action_ret)
+static inline int
+try_misrouted_irq(unsigned int irq, struct irq_desc *desc,
+                  irqreturn_t action_ret)
 {
         struct irqaction *action;
 
@@ -253,7 +254,8 @@ void note_interrupt(unsigned int irq, struct irq_desc *desc,
                 desc->depth++;
                 desc->chip->disable(irq);
 
-                mod_timer(&poll_spurious_irq_timer, jiffies + POLL_SPURIOUS_IRQ_INTERVAL);
+                mod_timer(&poll_spurious_irq_timer,
+                          jiffies + POLL_SPURIOUS_IRQ_INTERVAL);
         }
         desc->irqs_unhandled = 0;
 }