irq: name 'p' variables a bit better

'p' stands for pointer - make it clear in setup_irq() and free_irq()
what kind of pointer it is.

Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index de5a765..c589305 100644 (file)
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -399,7 +399,7 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
 static int
 __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
 {
-       struct irqaction *old, **p;
+       struct irqaction *old, **old_ptr;
        const char *old_name = NULL;
        unsigned long flags;
        int shared = 0;
@@ -431,8 +431,8 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
         * The following block of code has to be executed atomically
         */
        spin_lock_irqsave(&desc->lock, flags);
-       p = &desc->action;
-       old = *p;
+       old_ptr = &desc->action;
+       old = *old_ptr;
        if (old) {
                /*
                 * Can't share interrupts unless both agree to and are
@@ -455,8 +455,8 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
 
                /* add new interrupt at end of irq queue */
                do {
-                       p = &old->next;
-                       old = *p;
+                       old_ptr = &old->next;
+                       old = *old_ptr;
                } while (old);
                shared = 1;
        }
@@ -507,7 +507,7 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
                                (int)(new->flags & IRQF_TRIGGER_MASK));
        }
 
-       *p = new;
+       *old_ptr = new;
 
        /* Reset broken irq detection when installing new handler */
        desc->irq_count = 0;
@@ -575,7 +575,7 @@ int setup_irq(unsigned int irq, struct irqaction *act)
 void free_irq(unsigned int irq, void *dev_id)
 {
        struct irq_desc *desc = irq_to_desc(irq);
-       struct irqaction *action, **p;
+       struct irqaction *action, **action_ptr;
        unsigned long flags;
 
        WARN(in_interrupt(), "Trying to free IRQ %d from IRQ context!\n", irq);
@@ -589,9 +589,9 @@ void free_irq(unsigned int irq, void *dev_id)
         * There can be multiple actions per IRQ descriptor, find the right
         * one based on the dev_id:
         */
-       p = &desc->action;
+       action_ptr = &desc->action;
        for (;;) {
-               action = *p;
+               action = *action_ptr;
 
                if (!action) {
                        WARN(1, "Trying to free already-free IRQ %d\n", irq);
@@ -602,11 +602,11 @@ void free_irq(unsigned int irq, void *dev_id)
 
                if (action->dev_id == dev_id)
                        break;
-               p = &action->next;
+               action_ptr = &action->next;
        }
 
        /* Found it - now remove it from the list of entries: */
-       *p = action->next;
+       *action_ptr = action->next;
 
        /* Currently used only by UML, might disappear one day: */
 #ifdef CONFIG_IRQ_RELEASE_METHOD