From b08a8f296595208696433c1ecdcb28b7136cf087 Mon Sep 17 00:00:00 2001
From: David Daney <ddaney@caviumnetworks.com>
Date: Fri, 25 Mar 2011 12:38:49 -0700
Subject: [PATCH] --- yaml --- r: 243213 b: refs/heads/master c:
 0fdb4b259ed3e91b687ac26848202f5e7c217e62 h: refs/heads/master i:   243211:
 61d1a19130ecee80c5726234b0f96fcd719ffecf v: v3

---
 [refs]                    |  2 +-
 trunk/include/linux/irq.h |  8 ++++++
 trunk/kernel/irq/chip.c   | 58 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 67 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 96e865b3b233..9e12d8cb2a0f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 801a0e9ae36e9b487092e31699d28c0b9a21ad52
+refs/heads/master: 0fdb4b259ed3e91b687ac26848202f5e7c217e62
diff --git a/trunk/include/linux/irq.h b/trunk/include/linux/irq.h
index 8649b0fb9daf..c2a0c1929690 100644
--- a/trunk/include/linux/irq.h
+++ b/trunk/include/linux/irq.h
@@ -279,6 +279,8 @@ static inline bool irqd_irq_disabled(struct irq_data *d)
  * @irq_set_wake:	enable/disable power-management wake-on of an IRQ
  * @irq_bus_lock:	function to lock access to slow bus (i2c) chips
  * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
+ * @irq_cpu_online:	configure an interrupt source for a secondary CPU
+ * @irq_cpu_offline:	un-configure an interrupt source for a secondary CPU
  * @irq_print_chip:	optional to print special chip info in show_interrupts
  * @flags:		chip specific flags
  *
@@ -327,6 +329,9 @@ struct irq_chip {
 	void		(*irq_bus_lock)(struct irq_data *data);
 	void		(*irq_bus_sync_unlock)(struct irq_data *data);
 
+	void		(*irq_cpu_online)(struct irq_data *data);
+	void		(*irq_cpu_offline)(struct irq_data *data);
+
 	void		(*irq_print_chip)(struct irq_data *data, struct seq_file *p);
 
 	unsigned long	flags;
@@ -372,6 +377,9 @@ struct irqaction;
 extern int setup_irq(unsigned int irq, struct irqaction *new);
 extern void remove_irq(unsigned int irq, struct irqaction *act);
 
+extern void irq_cpu_online(void);
+extern void irq_cpu_offline(void);
+
 #ifdef CONFIG_GENERIC_HARDIRQS
 
 #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ)
diff --git a/trunk/kernel/irq/chip.c b/trunk/kernel/irq/chip.c
index 0a890bdd9c63..44b16a1ecd9a 100644
--- a/trunk/kernel/irq/chip.c
+++ b/trunk/kernel/irq/chip.c
@@ -696,3 +696,61 @@ void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
 
 	irq_put_desc_unlock(desc, flags);
 }
+
+/**
+ *	irq_cpu_online - Invoke all irq_cpu_online functions.
+ *
+ *	Iterate through all irqs and invoke the chip.irq_cpu_online()
+ *	for each.
+ */
+void irq_cpu_online(void)
+{
+	struct irq_desc *desc;
+	struct irq_chip *chip;
+	unsigned long flags;
+	unsigned int irq;
+
+	for_each_active_irq(irq) {
+		desc = irq_to_desc(irq);
+		if (!desc)
+			continue;
+
+		raw_spin_lock_irqsave(&desc->lock, flags);
+
+		chip = irq_data_get_irq_chip(&desc->irq_data);
+
+		if (chip && chip->irq_cpu_online)
+			chip->irq_cpu_online(&desc->irq_data);
+
+		raw_spin_unlock_irqrestore(&desc->lock, flags);
+	}
+}
+
+/**
+ *	irq_cpu_offline - Invoke all irq_cpu_offline functions.
+ *
+ *	Iterate through all irqs and invoke the chip.irq_cpu_offline()
+ *	for each.
+ */
+void irq_cpu_offline(void)
+{
+	struct irq_desc *desc;
+	struct irq_chip *chip;
+	unsigned long flags;
+	unsigned int irq;
+
+	for_each_active_irq(irq) {
+		desc = irq_to_desc(irq);
+		if (!desc)
+			continue;
+
+		raw_spin_lock_irqsave(&desc->lock, flags);
+
+		chip = irq_data_get_irq_chip(&desc->irq_data);
+
+		if (chip && chip->irq_cpu_offline)
+			chip->irq_cpu_offline(&desc->irq_data);
+
+		raw_spin_unlock_irqrestore(&desc->lock, flags);
+	}
+}