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authorDavid S. Miller <davem@davemloft.net>2008-07-18 11:39:39 +0200
committerDavid S. Miller <davem@davemloft.net>2008-07-18 11:39:39 +0200
commit49997d75152b3d23c53b0fa730599f2f74c92c65 (patch)
tree46e93126170d02cfec9505172e545732c1b69656 /kernel/irq/manage.c
parentpkt_sched: Make default qdisc nonshared-multiqueue safe. (diff)
parentMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff)
downloadlinux-49997d75152b3d23c53b0fa730599f2f74c92c65.tar.xz
linux-49997d75152b3d23c53b0fa730599f2f74c92c65.zip
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: Documentation/powerpc/booting-without-of.txt drivers/atm/Makefile drivers/net/fs_enet/fs_enet-main.c drivers/pci/pci-acpi.c net/8021q/vlan.c net/iucv/iucv.c
Diffstat (limited to 'kernel/irq/manage.c')
-rw-r--r--kernel/irq/manage.c33
1 files changed, 28 insertions, 5 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 46d6611a33bb..77a51be36010 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -17,6 +17,8 @@
#ifdef CONFIG_SMP
+cpumask_t irq_default_affinity = CPU_MASK_ALL;
+
/**
* synchronize_irq - wait for pending IRQ handlers (on other CPUs)
* @irq: interrupt number to wait for
@@ -95,6 +97,27 @@ int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
return 0;
}
+#ifndef CONFIG_AUTO_IRQ_AFFINITY
+/*
+ * Generic version of the affinity autoselector.
+ */
+int irq_select_affinity(unsigned int irq)
+{
+ cpumask_t mask;
+
+ if (!irq_can_set_affinity(irq))
+ return 0;
+
+ cpus_and(mask, cpu_online_map, irq_default_affinity);
+
+ irq_desc[irq].affinity = mask;
+ irq_desc[irq].chip->set_affinity(irq, mask);
+
+ set_balance_irq_affinity(irq, mask);
+ return 0;
+}
+#endif
+
#endif
/**
@@ -354,7 +377,7 @@ int setup_irq(unsigned int irq, struct irqaction *new)
/* Setup the type (level, edge polarity) if configured: */
if (new->flags & IRQF_TRIGGER_MASK) {
- if (desc->chip && desc->chip->set_type)
+ if (desc->chip->set_type)
desc->chip->set_type(irq,
new->flags & IRQF_TRIGGER_MASK);
else
@@ -364,8 +387,7 @@ int setup_irq(unsigned int irq, struct irqaction *new)
*/
printk(KERN_WARNING "No IRQF_TRIGGER set_type "
"function for IRQ %d (%s)\n", irq,
- desc->chip ? desc->chip->name :
- "unknown");
+ desc->chip->name);
} else
compat_irq_chip_set_default_handler(desc);
@@ -382,6 +404,9 @@ int setup_irq(unsigned int irq, struct irqaction *new)
} else
/* Undo nested disables: */
desc->depth = 1;
+
+ /* Set default affinity mask once everything is setup */
+ irq_select_affinity(irq);
}
/* Reset broken irq detection when installing new handler */
desc->irq_count = 0;
@@ -571,8 +596,6 @@ int request_irq(unsigned int irq, irq_handler_t handler,
action->next = NULL;
action->dev_id = dev_id;
- select_smp_affinity(irq);
-
#ifdef CONFIG_DEBUG_SHIRQ
if (irqflags & IRQF_SHARED) {
/*