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Commit 7d361cb7 authored by Mark Salter's avatar Mark Salter Committed by David Howells
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MN10300: cleanup IRQ affinity setting 



The irq_set_affinity handler for the mn10300 cpu pic had some hard-coded IRQs
which were not to be migrated from one cpu to another. This patch cleans those
up by using a combination of IRQF_NOBALANCING and specialized irq chips with
no irq_set_affinity handler. This maintains the previous behavior by using
generic IRQ interfaces rather than hard coding IRQ numbers in the default
irq_set_affinity handler.

Signed-off-by: default avatarMark Salter <msalter@redhat.com>
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
parent c98c406e

arch/mn10300/kernel/irq.c

+2 −48
Original line number Diff line number Diff line
@@ -142,57 +142,11 @@ mn10300_cpupic_setaffinity(struct irq_data *d, const struct cpumask *mask, 
			   bool force)

{

	unsigned long flags;

	int err;



	flags = arch_local_cli_save();



	/* check irq no */

	switch (d->irq) {

	case TMJCIRQ:

	case RESCHEDULE_IPI:

	case CALL_FUNC_SINGLE_IPI:

	case LOCAL_TIMER_IPI:

	case FLUSH_CACHE_IPI:

	case CALL_FUNCTION_NMI_IPI:

	case DEBUGGER_NMI_IPI:

#ifdef CONFIG_MN10300_TTYSM0

	case SC0RXIRQ:

	case SC0TXIRQ:

#ifdef CONFIG_MN10300_TTYSM0_TIMER8

	case TM8IRQ:

#elif CONFIG_MN10300_TTYSM0_TIMER2

	case TM2IRQ:

#endif /* CONFIG_MN10300_TTYSM0_TIMER8 */

#endif /* CONFIG_MN10300_TTYSM0 */



#ifdef CONFIG_MN10300_TTYSM1

	case SC1RXIRQ:

	case SC1TXIRQ:

#ifdef CONFIG_MN10300_TTYSM1_TIMER12

	case TM12IRQ:

#elif defined(CONFIG_MN10300_TTYSM1_TIMER9)

	case TM9IRQ:

#elif defined(CONFIG_MN10300_TTYSM1_TIMER3)

	case TM3IRQ:

#endif /* CONFIG_MN10300_TTYSM1_TIMER12 */

#endif /* CONFIG_MN10300_TTYSM1 */



#ifdef CONFIG_MN10300_TTYSM2

	case SC2RXIRQ:

	case SC2TXIRQ:

	case TM10IRQ:

#endif /* CONFIG_MN10300_TTYSM2 */

		err = -1;

		break;



	default:

	set_bit(d->irq, irq_affinity_request);

		err = 0;

		break;

	}



	arch_local_irq_restore(flags);

	return err;

	return 0;

}

#endif /* CONFIG_SMP */

arch/mn10300/kernel/mn10300-serial.c

+6 −3
Original line number Diff line number Diff line
@@ -936,15 +936,18 @@ static int mn10300_serial_startup(struct uart_port *_port) 
	irq_set_chip(port->tm_irq, &mn10300_serial_pic);



	if (request_irq(port->rx_irq, mn10300_serial_interrupt,

			IRQF_DISABLED, port->rx_name, port) < 0)

			IRQF_DISABLED | IRQF_NOBALANCING,

			port->rx_name, port) < 0)

		goto error;



	if (request_irq(port->tx_irq, mn10300_serial_interrupt,

			IRQF_DISABLED, port->tx_name, port) < 0)

			IRQF_DISABLED | IRQF_NOBALANCING,

			port->tx_name, port) < 0)

		goto error2;



	if (request_irq(port->tm_irq, mn10300_serial_interrupt,

			IRQF_DISABLED, port->tm_name, port) < 0)

			IRQF_DISABLED | IRQF_NOBALANCING,

			port->tm_name, port) < 0)

		goto error3;

	mn10300_serial_mask_ack(port->tm_irq);

arch/mn10300/kernel/smp.c

+9 −1
Original line number Diff line number Diff line
@@ -130,10 +130,12 @@ static irqreturn_t smp_call_function_interrupt(int irq, void *dev_id); 


static struct irqaction reschedule_ipi = {

	.handler	= smp_reschedule_interrupt,

	.flags		= IRQF_NOBALANCING,

	.name		= "smp reschedule IPI"

};

static struct irqaction call_function_ipi = {

	.handler	= smp_call_function_interrupt,

	.flags		= IRQF_NOBALANCING,

	.name		= "smp call function IPI"

};
@@ -141,7 +143,7 @@ static struct irqaction call_function_ipi = { 
static irqreturn_t smp_ipi_timer_interrupt(int irq, void *dev_id);

static struct irqaction local_timer_ipi = {

	.handler	= smp_ipi_timer_interrupt,

	.flags		= IRQF_DISABLED,

	.flags		= IRQF_DISABLED | IRQF_NOBALANCING,

	.name		= "smp local timer IPI"

};

#endif
@@ -180,6 +182,7 @@ static void init_ipi(void) 


#ifdef CONFIG_MN10300_CACHE_ENABLED

	/* set up the cache flush IPI */

	irq_set_chip(FLUSH_CACHE_IPI, &mn10300_ipi_type);

	flags = arch_local_cli_save();

	__set_intr_stub(NUM2EXCEP_IRQ_LEVEL(FLUSH_CACHE_GxICR_LV),

			mn10300_low_ipi_handler);
@@ -189,6 +192,7 @@ static void init_ipi(void) 
#endif



	/* set up the NMI call function IPI */

	irq_set_chip(CALL_FUNCTION_NMI_IPI, &mn10300_ipi_type);

	flags = arch_local_cli_save();

	GxICR(CALL_FUNCTION_NMI_IPI) = GxICR_NMI | GxICR_ENABLE | GxICR_DETECT;

	tmp16 = GxICR(CALL_FUNCTION_NMI_IPI);
@@ -199,6 +203,10 @@ static void init_ipi(void) 
	__set_intr_stub(NUM2EXCEP_IRQ_LEVEL(SMP_BOOT_GxICR_LV),

			mn10300_low_ipi_handler);

	arch_local_irq_restore(flags);



#ifdef CONFIG_KERNEL_DEBUGGER

	irq_set_chip(DEBUGGER_NMI_IPI, &mn10300_ipi_type);

#endif

}



/**