[SPARC]: Fix dependency on previous NR_IRQS value.

arch/sparc/kernel/irq.c

@@ -152,7 +152,7 @@ void free_irq(unsigned int irq, void *dev_id)
 		
 		return sun4d_free_irq(irq, dev_id);
 	}
-	cpu_irq = irq & NR_IRQS;
+	cpu_irq = irq & (NR_IRQS - 1);
 	action = *(cpu_irq + irq_action);
         if (cpu_irq > 14) {  /* 14 irq levels on the sparc */
                 printk("Trying to free bogus IRQ %d\n", irq);
@@ -391,7 +391,7 @@ void unexpected_irq(int irq, void *dev_id, struct pt_regs * regs)
 	struct irqaction * action;
 	unsigned int cpu_irq;
 	
-	cpu_irq = irq & NR_IRQS;
+	cpu_irq = irq & (NR_IRQS - 1);
 	action = *(cpu_irq + irq_action);
 
         printk("IO device interrupt, irq = %d\n", irq);
@@ -469,7 +469,7 @@ int request_fast_irq(unsigned int irq,
 	extern struct tt_entry trapbase_cpu1, trapbase_cpu2, trapbase_cpu3;
 #endif
 	
-	cpu_irq = irq & NR_IRQS;
+	cpu_irq = irq & (NR_IRQS - 1);
 	if(cpu_irq > 14)
 		return -EINVAL;
 	if(!handler)
@@ -559,7 +559,7 @@ int request_irq(unsigned int irq,
 					     unsigned long, const char *, void *);
 		return sun4d_request_irq(irq, handler, irqflags, devname, dev_id);
 	}
-	cpu_irq = irq & NR_IRQS;
+	cpu_irq = irq & (NR_IRQS - 1);
 	if(cpu_irq > 14)
 		return -EINVAL;
 

arch/sparc/kernel/sun4c_irq.c

@@ -57,7 +57,7 @@ static void sun4c_disable_irq(unsigned int irq_nr)
 	unsigned char current_mask, new_mask;
     
 	save_and_cli(flags);
-	irq_nr &= NR_IRQS;
+	irq_nr &= (NR_IRQS - 1);
 	current_mask = *interrupt_enable;
 	switch(irq_nr) {
 	case 1:
@@ -86,7 +86,7 @@ static void sun4c_enable_irq(unsigned int irq_nr)
 	unsigned char current_mask, new_mask;
     
 	save_and_cli(flags);
-	irq_nr &= NR_IRQS;
+	irq_nr &= (NR_IRQS - 1);
 	current_mask = *interrupt_enable;
 	switch(irq_nr) {
 	case 1: