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authorDavid S. Miller <davem@davemloft.net>2011-01-24 22:30:13 (GMT)
committerDavid S. Miller <davem@davemloft.net>2011-01-24 22:30:13 (GMT)
commitc2df88cbb43c25db27fbbf94e92318bdad018f3e (patch)
treedc41466a193f85e3a7cc8baf1f78f2b55b62aabc /include
parent5bdc22a56549e7983c6b443298672641952ea035 (diff)
parentcd7eab44e9946c28d595abe3e9a43e945bc49141 (diff)
downloadlinux-fsl-qoriq-c2df88cbb43c25db27fbbf94e92318bdad018f3e.tar.xz
Merge branch 'irq/numa' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
Diffstat (limited to 'include')
-rw-r--r--include/linux/interrupt.h33
-rw-r--r--include/linux/irqdesc.h3
2 files changed, 35 insertions, 1 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 55e0d42..63c5ad7 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -14,6 +14,8 @@
#include <linux/smp.h>
#include <linux/percpu.h>
#include <linux/hrtimer.h>
+#include <linux/kref.h>
+#include <linux/workqueue.h>
#include <asm/atomic.h>
#include <asm/ptrace.h>
@@ -240,6 +242,35 @@ extern int irq_can_set_affinity(unsigned int irq);
extern int irq_select_affinity(unsigned int irq);
extern int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m);
+
+/**
+ * struct irq_affinity_notify - context for notification of IRQ affinity changes
+ * @irq: Interrupt to which notification applies
+ * @kref: Reference count, for internal use
+ * @work: Work item, for internal use
+ * @notify: Function to be called on change. This will be
+ * called in process context.
+ * @release: Function to be called on release. This will be
+ * called in process context. Once registered, the
+ * structure must only be freed when this function is
+ * called or later.
+ */
+struct irq_affinity_notify {
+ unsigned int irq;
+ struct kref kref;
+ struct work_struct work;
+ void (*notify)(struct irq_affinity_notify *, const cpumask_t *mask);
+ void (*release)(struct kref *ref);
+};
+
+extern int
+irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify);
+
+static inline void irq_run_affinity_notifiers(void)
+{
+ flush_scheduled_work();
+}
+
#else /* CONFIG_SMP */
static inline int irq_set_affinity(unsigned int irq, const struct cpumask *m)
@@ -255,7 +286,7 @@ static inline int irq_can_set_affinity(unsigned int irq)
static inline int irq_select_affinity(unsigned int irq) { return 0; }
static inline int irq_set_affinity_hint(unsigned int irq,
- const struct cpumask *m)
+ const struct cpumask *m)
{
return -EINVAL;
}
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index c1a95b7..bfef56d 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -8,6 +8,7 @@
* For now it's included from <linux/irq.h>
*/
+struct irq_affinity_notify;
struct proc_dir_entry;
struct timer_rand_state;
/**
@@ -24,6 +25,7 @@ struct timer_rand_state;
* @last_unhandled: aging timer for unhandled count
* @irqs_unhandled: stats field for spurious unhandled interrupts
* @lock: locking for SMP
+ * @affinity_notify: context for notification of affinity changes
* @pending_mask: pending rebalanced interrupts
* @threads_active: number of irqaction threads currently running
* @wait_for_threads: wait queue for sync_irq to wait for threaded handlers
@@ -70,6 +72,7 @@ struct irq_desc {
raw_spinlock_t lock;
#ifdef CONFIG_SMP
const struct cpumask *affinity_hint;
+ struct irq_affinity_notify *affinity_notify;
#ifdef CONFIG_GENERIC_PENDING_IRQ
cpumask_var_t pending_mask;
#endif