---

yaml --- r: 234743 b: refs/heads/master c: a005677 h: refs/heads/master i: 234741: 4ef73d7 234739: 0a71c16 234735: 6f652f2 v: v3
git-mirror · Feb 19, 2011 · 49608ab · 49608ab
1 parent 25172d9
commit 49608ab
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Showing 8 changed files with 85 additions and 16 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1ce6068dac1924f7095be5850481e790cbf1b3c1
+refs/heads/master: a005677b3dd05decdd8880cf3044ae709856f58f
diff --git a/trunk/include/linux/irq.h b/trunk/include/linux/irq.h
@@ -132,17 +132,31 @@ struct irq_data {
  * Bit masks for irq_data.state
  *
  * IRQD_SETAFFINITY_PENDING	- Affinity setting is pending
+ * IRQD_NO_BALANCING		- Balancing disabled for this IRQ
+ * IRQD_PER_CPU			- Interrupt is per cpu
  */
 enum {
 	/* Bit 0 - 7 reserved for TYPE will use later */
-	IRQD_SETAFFINITY_PENDING = (1 << 8),
+	IRQD_SETAFFINITY_PENDING	= (1 <<  8),
+	IRQD_NO_BALANCING		= (1 << 10),
+	IRQD_PER_CPU			= (1 << 11),
 };
 
 static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
 {
 	return d->state_use_accessors & IRQD_SETAFFINITY_PENDING;
 }
 
+static inline bool irqd_is_per_cpu(struct irq_data *d)
+{
+	return d->state_use_accessors & IRQD_PER_CPU;
+}
+
+static inline bool irqd_can_balance(struct irq_data *d)
+{
+	return !(d->state_use_accessors & (IRQD_PER_CPU | IRQD_NO_BALANCING));
+}
+
 /**
  * struct irq_chip - hardware interrupt chip descriptor
  *

diff --git a/trunk/kernel/irq/chip.c b/trunk/kernel/irq/chip.c
@@ -706,12 +706,15 @@ void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
 	if (!desc)
 		return;
 
-	/* Sanitize flags */
-	set &= IRQF_MODIFY_MASK;
-	clr &= IRQF_MODIFY_MASK;
-
 	raw_spin_lock_irqsave(&desc->lock, flags);
-	desc->status &= ~clr;
-	desc->status |= set;
+
+	irq_settings_clr_and_set(desc, clr, set);
+
+	irqd_clear(&desc->irq_data, IRQD_NO_BALANCING | IRQD_PER_CPU);
+	if (irq_settings_has_no_balance_set(desc))
+		irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
+	if (irq_settings_is_per_cpu(desc))
+		irqd_set(&desc->irq_data, IRQD_PER_CPU);
+
 	raw_spin_unlock_irqrestore(&desc->lock, flags);
 }
diff --git a/trunk/kernel/irq/internals.h b/trunk/kernel/irq/internals.h
@@ -139,3 +139,14 @@ static inline void irqd_clr_move_pending(struct irq_data *d)
 	d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
 	irq_compat_clr_move_pending(irq_data_to_desc(d));
 }
+
+static inline void irqd_clear(struct irq_data *d, unsigned int mask)
+{
+	d->state_use_accessors &= ~mask;
+}
+
+static inline void irqd_set(struct irq_data *d, unsigned int mask)
+{
+	d->state_use_accessors |= mask;
+}
+
diff --git a/trunk/kernel/irq/manage.c b/trunk/kernel/irq/manage.c
@@ -73,8 +73,8 @@ int irq_can_set_affinity(unsigned int irq)
 {
 	struct irq_desc *desc = irq_to_desc(irq);
 
-	if ((desc->status & (IRQ_PER_CPU | IRQ_NO_BALANCING)) ||
-	    !desc->irq_data.chip || !desc->irq_data.chip->irq_set_affinity)
+	if (!irqd_can_balance(&desc->irq_data) || !desc->irq_data.chip ||
+	    !desc->irq_data.chip->irq_set_affinity)
 		return 0;
 
 	return 1;
@@ -897,8 +897,10 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
 				  IRQS_INPROGRESS | IRQS_ONESHOT | \
 				  IRQS_WAITING);
 
-		if (new->flags & IRQF_PERCPU)
-			desc->status |= IRQ_PER_CPU;
+		if (new->flags & IRQF_PERCPU) {
+			irqd_set(&desc->irq_data, IRQD_PER_CPU);
+			irq_settings_set_per_cpu(desc);
+		}
 
 		if (new->flags & IRQF_ONESHOT)
 			desc->istate |= IRQS_ONESHOT;
@@ -910,8 +912,10 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
 			desc->depth = 1;
 
 		/* Exclude IRQ from balancing if requested */
-		if (new->flags & IRQF_NOBALANCING)
-			desc->status |= IRQ_NO_BALANCING;
+		if (new->flags & IRQF_NOBALANCING) {
+			irq_settings_set_no_balancing(desc);
+			irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
+		}
 
 		/* Set default affinity mask once everything is setup */
 		setup_affinity(irq, desc, mask);

diff --git a/trunk/kernel/irq/migration.c b/trunk/kernel/irq/migration.c
@@ -15,7 +15,7 @@ void move_masked_irq(int irq)
 	/*
 	 * Paranoia: cpu-local interrupts shouldn't be calling in here anyway.
 	 */
-	if (desc->status & (IRQ_PER_CPU | IRQ_NO_BALANCING)) {
+	if (!irqd_can_balance(&desc->irq_data)) {
 		WARN_ON(1);
 		return;
 	}

diff --git a/trunk/kernel/irq/settings.h b/trunk/kernel/irq/settings.h
@@ -4,6 +4,9 @@
  */
 enum {
 	_IRQ_DEFAULT_INIT_FLAGS	= IRQ_DEFAULT_INIT_FLAGS,
+	_IRQ_PER_CPU		= IRQ_PER_CPU,
+	_IRQ_NO_BALANCING	= IRQ_NO_BALANCING,
+	_IRQF_MODIFY_MASK	= IRQF_MODIFY_MASK,
 };
 
 #undef IRQ_INPROGRESS
@@ -22,3 +25,36 @@ enum {
 #define IRQ_WAKEUP		GOT_YOU_MORON
 #undef IRQ_MOVE_PENDING
 #define IRQ_MOVE_PENDING	GOT_YOU_MORON
+#undef IRQ_PER_CPU
+#define IRQ_PER_CPU		GOT_YOU_MORON
+#undef IRQ_NO_BALANCING
+#define IRQ_NO_BALANCING	GOT_YOU_MORON
+#undef IRQF_MODIFY_MASK
+#define IRQF_MODIFY_MASK	GOT_YOU_MORON
+
+static inline void
+irq_settings_clr_and_set(struct irq_desc *desc, u32 clr, u32 set)
+{
+	desc->status &= ~(clr & _IRQF_MODIFY_MASK);
+	desc->status |= (set & _IRQF_MODIFY_MASK);
+}
+
+static inline bool irq_settings_is_per_cpu(struct irq_desc *desc)
+{
+	return desc->status & _IRQ_PER_CPU;
+}
+
+static inline void irq_settings_set_per_cpu(struct irq_desc *desc)
+{
+	desc->status |= _IRQ_PER_CPU;
+}
+
+static inline void irq_settings_set_no_balancing(struct irq_desc *desc)
+{
+	desc->status |= _IRQ_NO_BALANCING;
+}
+
+static inline bool irq_settings_has_no_balance_set(struct irq_desc *desc)
+{
+	return desc->status & _IRQ_NO_BALANCING;
+}
diff --git a/trunk/kernel/irq/spurious.c b/trunk/kernel/irq/spurious.c
@@ -68,7 +68,8 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force)
 	raw_spin_lock(&desc->lock);
 
 	/* PER_CPU and nested thread interrupts are never polled */
-	if (desc->status & (IRQ_PER_CPU | IRQ_NESTED_THREAD))
+	if (irq_settings_is_per_cpu(desc) ||
+	    (desc->status & IRQ_NESTED_THREAD))
 		goto out;
 
 	/*