[MIPS] Sibyte: Delete {sb1250,bcm1480}_steal_irq().

They break the timer interrupt initialization and only seem to be a kludge
for initialization happening in the wrong order.  Further testing done by
Thiemo confirms the suspicion that the other invocations also seem to have
useless.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/sibyte/bcm1480/irq.c

@@ -280,27 +280,6 @@ static struct irqaction bcm1480_dummy_action = {
 	.dev_id  = 0
 };
 
-int bcm1480_steal_irq(int irq)
-{
-	struct irq_desc *desc = irq_desc + irq;
-	unsigned long flags;
-	int retval = 0;
-
-	if (irq >= BCM1480_NR_IRQS)
-		return -EINVAL;
-
-	spin_lock_irqsave(&desc->lock, flags);
-	/* Don't allow sharing at all for these */
-	if (desc->action != NULL)
-		retval = -EBUSY;
-	else {
-		desc->action = &bcm1480_dummy_action;
-		desc->depth = 0;
-	}
-	spin_unlock_irqrestore(&desc->lock, flags);
-	return 0;
-}
-
 /*
  *  init_IRQ is called early in the boot sequence from init/main.c.  It
  *  is responsible for setting up the interrupt mapper and installing the
@@ -386,8 +365,6 @@ void __init arch_init_irq(void)
 		__raw_writeq(tmp, IOADDR(A_BCM1480_IMR_REGISTER(cpu, R_BCM1480_IMR_INTERRUPT_MASK_L)));
 	}
 
-	bcm1480_steal_irq(K_BCM1480_INT_MBOX_0_0);
-
 	/*
 	 * Note that the timer interrupts are also mapped, but this is
 	 * done in bcm1480_time_init().  Also, the profiling driver
@@ -411,7 +388,6 @@ void __init arch_init_irq(void)
 		/* QQQ FIXME */
 		__raw_writeq(M_DUART_IMR_BRK, IO_SPACE_BASE + A_DUART_IMRREG(kgdb_port));
 
-		bcm1480_steal_irq(kgdb_irq);
 		__raw_writeq(IMR_IP6_VAL,
 			     IO_SPACE_BASE + A_BCM1480_IMR_REGISTER(0, R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) +
 			     (kgdb_irq<<3));

arch/mips/sibyte/bcm1480/time.c

@@ -37,8 +37,6 @@
 #define IMR_IP3_VAL	K_BCM1480_INT_MAP_I1
 #define IMR_IP4_VAL	K_BCM1480_INT_MAP_I2
 
-extern int bcm1480_steal_irq(int irq);
-
 /*
  * The general purpose timer ticks at 1MHz independent if
  * the rest of the system
@@ -142,7 +140,6 @@ void __cpuinit sb1480_clockevent_init(void)
 			R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) + (irq << 3)));
 
 	bcm1480_unmask_irq(cpu, irq);
-	bcm1480_steal_irq(irq);
 
 	action->handler	= sibyte_counter_handler;
 	action->flags	= IRQF_DISABLED | IRQF_PERCPU;

arch/mips/sibyte/sb1250/irq.c

@@ -250,27 +250,6 @@ static struct irqaction sb1250_dummy_action = {
 	.dev_id  = 0
 };
 
-int sb1250_steal_irq(int irq)
-{
-	struct irq_desc *desc = irq_desc + irq;
-	unsigned long flags;
-	int retval = 0;
-
-	if (irq >= SB1250_NR_IRQS)
-		return -EINVAL;
-
-	spin_lock_irqsave(&desc->lock, flags);
-	/* Don't allow sharing at all for these */
-	if (desc->action != NULL)
-		retval = -EBUSY;
-	else {
-		desc->action = &sb1250_dummy_action;
-		desc->depth = 0;
-	}
-	spin_unlock_irqrestore(&desc->lock, flags);
-	return 0;
-}
-
 /*
  *  arch_init_irq is called early in the boot sequence from init/main.c via
  *  init_IRQ.  It is responsible for setting up the interrupt mapper and
@@ -342,8 +321,6 @@ void __init arch_init_irq(void)
 	__raw_writeq(tmp, IOADDR(A_IMR_REGISTER(0, R_IMR_INTERRUPT_MASK)));
 	__raw_writeq(tmp, IOADDR(A_IMR_REGISTER(1, R_IMR_INTERRUPT_MASK)));
 
-	sb1250_steal_irq(K_INT_MBOX_0);
-
 	/*
 	 * Note that the timer interrupts are also mapped, but this is
 	 * done in sb1250_time_init().  Also, the profiling driver
@@ -367,7 +344,6 @@ void __init arch_init_irq(void)
 		__raw_writeq(M_DUART_IMR_BRK,
 			     IOADDR(A_DUART_IMRREG(kgdb_port)));
 
-		sb1250_steal_irq(kgdb_irq);
 		__raw_writeq(IMR_IP6_VAL,
 			     IOADDR(A_IMR_REGISTER(0,
 						   R_IMR_INTERRUPT_MAP_BASE) +

arch/mips/sibyte/sb1250/time.c

@@ -50,8 +50,6 @@
 #define SB1250_HPT_VALUE	M_SCD_TIMER_CNT /* max value */
 
 
-extern int sb1250_steal_irq(int irq);
-
 /*
  * The general purpose timer ticks at 1 Mhz independent if
  * the rest of the system
@@ -159,7 +157,6 @@ void __cpuinit sb1250_clockevent_init(void)
 	cd->cpumask = cpumask_of_cpu(0);
 
 	sb1250_unmask_irq(cpu, irq);
-	sb1250_steal_irq(irq);
 
 	action->handler	= sibyte_counter_handler;
 	action->flags	= IRQF_DISABLED | IRQF_PERCPU;