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authorMark Salter <msalter@redhat.com>2012-12-12 15:36:37 +0000
committerDavid Howells <dhowells@redhat.com>2012-12-12 15:46:14 +0000
commit7d361cb754720d69695a3efc973e9a1a51e46b21 (patch)
tree4db3debac5fc6f6a78f0f185c4dcc5d9ddf01249 /arch
parentc98c406eb2c518c7c5bc922fafa1f9fdcb7b76f4 (diff)
downloadlinux-linaro-stable-7d361cb754720d69695a3efc973e9a1a51e46b21.tar.gz
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: Mark Salter <msalter@redhat.com> Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/mn10300/kernel/irq.c50
-rw-r--r--arch/mn10300/kernel/mn10300-serial.c9
-rw-r--r--arch/mn10300/kernel/smp.c10
3 files changed, 17 insertions, 52 deletions
diff --git a/arch/mn10300/kernel/irq.c b/arch/mn10300/kernel/irq.c
index 35932a8de8b8..6ab3b73efcf8 100644
--- a/arch/mn10300/kernel/irq.c
+++ b/arch/mn10300/kernel/irq.c
@@ -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;
- }
-
+ set_bit(d->irq, irq_affinity_request);
arch_local_irq_restore(flags);
- return err;
+ return 0;
}
#endif /* CONFIG_SMP */
diff --git a/arch/mn10300/kernel/mn10300-serial.c b/arch/mn10300/kernel/mn10300-serial.c
index 131b81f9d6c8..4968cfe66c06 100644
--- a/arch/mn10300/kernel/mn10300-serial.c
+++ b/arch/mn10300/kernel/mn10300-serial.c
@@ -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);
diff --git a/arch/mn10300/kernel/smp.c b/arch/mn10300/kernel/smp.c
index e62c223e4c45..95983cd21e77 100644
--- a/arch/mn10300/kernel/smp.c
+++ b/arch/mn10300/kernel/smp.c
@@ -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
}
/**