[PATCH] genirq: cleanup: merge pending_irq_cpumask[] into irq_desc[]

Consolidation: remove the pending_irq_cpumask[NR_IRQS] array and move it into
the irq_desc[NR_IRQS].pending_mask field.
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>

arch/i386/kernel/io_apic.c

@@ -581,7 +581,7 @@ static int balanced_irq(void *unused)
 	
 	/* push everything to CPU 0 to give us a starting point.  */
 	for (i = 0 ; i < NR_IRQS ; i++) {
-		pending_irq_cpumask[i] = cpumask_of_cpu(0);
+		irq_desc[i].pending_mask = cpumask_of_cpu(0);
 		set_pending_irq(i, cpumask_of_cpu(0));
 	}
 

include/linux/irq.h

@@ -83,6 +83,7 @@ struct irq_desc {
 	cpumask_t		affinity;
 #endif
 #if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
+	cpumask_t		pending_mask;
 	unsigned int		move_irq;	/* need to re-target IRQ dest */
 #endif
 #ifdef CONFIG_PROC_FS
@@ -120,7 +121,6 @@ static inline void set_native_irq_info(int irq, cpumask_t mask)
 #ifdef CONFIG_SMP
 
 #if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
-extern cpumask_t pending_irq_cpumask[NR_IRQS];
 
 void set_pending_irq(unsigned int irq, cpumask_t mask);
 void move_native_irq(int irq);

kernel/irq/manage.c

@@ -16,10 +16,6 @@
 
 #ifdef CONFIG_SMP
 
-#if defined (CONFIG_GENERIC_PENDING_IRQ) || defined (CONFIG_IRQBALANCE)
-cpumask_t __cacheline_aligned pending_irq_cpumask[NR_IRQS];
-#endif
-
 /**
  *	synchronize_irq - wait for pending IRQ handlers (on other CPUs)
  *	@irq: interrupt number to wait for

kernel/irq/migration.c

@@ -8,7 +8,7 @@ void set_pending_irq(unsigned int irq, cpumask_t mask)
 
 	spin_lock_irqsave(&desc->lock, flags);
 	desc->move_irq = 1;
-	pending_irq_cpumask[irq] = mask;
+	irq_desc[irq].pending_mask = mask;
 	spin_unlock_irqrestore(&desc->lock, flags);
 }
 
@@ -30,7 +30,7 @@ void move_native_irq(int irq)
 
 	desc->move_irq = 0;
 
-	if (unlikely(cpus_empty(pending_irq_cpumask[irq])))
+	if (unlikely(cpus_empty(irq_desc[irq].pending_mask)))
 		return;
 
 	if (!desc->chip->set_affinity)
@@ -38,7 +38,7 @@ void move_native_irq(int irq)
 
 	assert_spin_locked(&desc->lock);
 
-	cpus_and(tmp, pending_irq_cpumask[irq], cpu_online_map);
+	cpus_and(tmp, irq_desc[irq].pending_mask, cpu_online_map);
 
 	/*
 	 * If there was a valid mask to work with, please
@@ -58,5 +58,5 @@ void move_native_irq(int irq)
 		if (likely(!(desc->status & IRQ_DISABLED)))
 			desc->chip->enable(irq);
 	}
-	cpus_clear(pending_irq_cpumask[irq]);
+	cpus_clear(irq_desc[irq].pending_mask);
 }