[PATCH] genirq: cleanup: merge irq_dir[], smp_affinity_entry[] into irq_desc[]

Consolidation: remove the irq_dir[NR_IRQS] and the smp_affinity_entry[NR_IRQS]
arrays and move them into the irq_desc[] array.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/irq.h

@@ -61,6 +61,8 @@ struct hw_interrupt_type {
 
 typedef struct hw_interrupt_type  hw_irq_controller;
 
+struct proc_dir_entry;
+
 /*
  * This is the "IRQ descriptor", which contains various information
  * about the irq, including what kind of hardware handling it has,
@@ -83,6 +85,9 @@ struct irq_desc {
 #if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
 	unsigned int		move_irq;	/* need to re-target IRQ dest */
 #endif
+#ifdef CONFIG_PROC_FS
+	struct proc_dir_entry *dir;
+#endif
 } ____cacheline_aligned;
 
 extern struct irq_desc irq_desc[NR_IRQS];

kernel/irq/proc.c

@@ -12,15 +12,10 @@
 
 #include "internals.h"
 
-static struct proc_dir_entry *root_irq_dir, *irq_dir[NR_IRQS];
+static struct proc_dir_entry *root_irq_dir;
 
 #ifdef CONFIG_SMP
 
-/*
- * The /proc/irq/<irq>/smp_affinity values:
- */
-static struct proc_dir_entry *smp_affinity_entry[NR_IRQS];
-
 #ifdef CONFIG_GENERIC_PENDING_IRQ
 void proc_set_irq_affinity(unsigned int irq, cpumask_t mask_val)
 {
@@ -102,7 +97,7 @@ void register_handler_proc(unsigned int irq, struct irqaction *action)
 {
 	char name [MAX_NAMELEN];
 
-	if (!irq_dir[irq] || action->dir || !action->name ||
+	if (!irq_desc[irq].dir || action->dir || !action->name ||
 					!name_unique(irq, action))
 		return;
 
@@ -110,7 +105,7 @@ void register_handler_proc(unsigned int irq, struct irqaction *action)
 	snprintf(name, MAX_NAMELEN, "%s", action->name);
 
 	/* create /proc/irq/1234/handler/ */
-	action->dir = proc_mkdir(name, irq_dir[irq]);
+	action->dir = proc_mkdir(name, irq_desc[irq].dir);
 }
 
 #undef MAX_NAMELEN
@@ -123,21 +118,21 @@ void register_irq_proc(unsigned int irq)
 
 	if (!root_irq_dir ||
 		(irq_desc[irq].chip == &no_irq_type) ||
-			irq_dir[irq])
+			irq_desc[irq].dir)
 		return;
 
 	memset(name, 0, MAX_NAMELEN);
 	sprintf(name, "%d", irq);
 
 	/* create /proc/irq/1234 */
-	irq_dir[irq] = proc_mkdir(name, root_irq_dir);
+	irq_desc[irq].dir = proc_mkdir(name, root_irq_dir);
 
 #ifdef CONFIG_SMP
 	{
 		struct proc_dir_entry *entry;
 
 		/* create /proc/irq/<irq>/smp_affinity */
-		entry = create_proc_entry("smp_affinity", 0600, irq_dir[irq]);
+		entry = create_proc_entry("smp_affinity", 0600, irq_desc[irq].dir);
 
 		if (entry) {
 			entry->nlink = 1;
@@ -145,7 +140,6 @@ void register_irq_proc(unsigned int irq)
 			entry->read_proc = irq_affinity_read_proc;
 			entry->write_proc = irq_affinity_write_proc;
 		}
-		smp_affinity_entry[irq] = entry;
 	}
 #endif
 }
@@ -155,7 +149,7 @@ void register_irq_proc(unsigned int irq)
 void unregister_handler_proc(unsigned int irq, struct irqaction *action)
 {
 	if (action->dir)
-		remove_proc_entry(action->dir->name, irq_dir[irq]);
+		remove_proc_entry(action->dir->name, irq_desc[irq].dir);
 }
 
 void init_irq_proc(void)