[RFC v1 02/11] genirq: Move field 'node' from struct irq_data into struct irq_common_data

[Jiang Liu <jiang.liu@linux.intel.com>]

NUMA node information is per-irq instead of per-irqchip, so move it into
struct irq_common_data.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
 arch/sh/kernel/irq.c          |    2 +-
 arch/x86/kernel/apic/vector.c |    8 ++++----
 arch/x86/platform/uv/uv_irq.c |    2 +-
 include/linux/irq.h           |   20 ++++++++++++++++++--
 kernel/irq/internals.h        |    5 +++++
 kernel/irq/irqdesc.c          |   10 ++--------
 kernel/irq/irqdomain.c        |    4 ++--
 kernel/irq/manage.c           |    2 +-
 kernel/irq/proc.c             |    2 +-
 9 files changed, 35 insertions(+), 20 deletions(-)

diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index eb10ff84015c..8dc677cc136b 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -227,7 +227,7 @@ void migrate_irqs(void)
 	for_each_active_irq(irq) {
 		struct irq_data *data = irq_get_irq_data(irq);
 
-		if (data->node = cpu) {
+		if (irq_data_get_node(data) = cpu) {
 			unsigned int newcpu = cpumask_any_and(data->affinity,
 							      cpu_online_mask);
 			if (newcpu >= nr_cpu_ids) {
diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index 96ce5068a926..983bea2a09ce 100644
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -345,7 +345,7 @@ static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq,
 	struct irq_alloc_info *info = arg;
 	struct apic_chip_data *data;
 	struct irq_data *irq_data;
-	int i, err;
+	int i, err, node;
 
 	if (disable_apic)
 		return -ENXIO;
@@ -357,12 +357,13 @@ static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq,
 	for (i = 0; i < nr_irqs; i++) {
 		irq_data = irq_domain_get_irq_data(domain, virq + i);
 		BUG_ON(!irq_data);
+		node = irq_data_get_node(irq_data);
 #ifdef	CONFIG_X86_IO_APIC
 		if (virq + i < nr_legacy_irqs() && legacy_irq_data[virq + i])
 			data = legacy_irq_data[virq + i];
 		else
 #endif
-			data = alloc_apic_chip_data(irq_data->node);
+			data = alloc_apic_chip_data(node);
 		if (!data) {
 			err = -ENOMEM;
 			goto error;
@@ -371,8 +372,7 @@ static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq,
 		irq_data->chip = &lapic_controller;
 		irq_data->chip_data = data;
 		irq_data->hwirq = virq + i;
-		err = assign_irq_vector_policy(virq, irq_data->node, data,
-					       info);
+		err = assign_irq_vector_policy(virq, node, data, info);
 		if (err)
 			goto error;
 	}
diff --git a/arch/x86/platform/uv/uv_irq.c b/arch/x86/platform/uv/uv_irq.c
index cdf86cd3fd97..bc992b7b041f 100644
--- a/arch/x86/platform/uv/uv_irq.c
+++ b/arch/x86/platform/uv/uv_irq.c
@@ -89,7 +89,7 @@ static int uv_domain_alloc(struct irq_domain *domain, unsigned int virq,
 		return -EINVAL;
 
 	chip_data = kmalloc_node(sizeof(*chip_data), GFP_KERNEL,
-				 irq_data->node);
+				 irq_data_get_node(irq_data));
 	if (!chip_data)
 		return -ENOMEM;
 
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 3b6e0def7f5c..3f999a0af713 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -129,9 +129,13 @@ struct irq_domain;
  * struct irq_common_data - per irq data shared by all irqchips
  * @state_use_accessors: status information for irq chip functions.
  *			Use accessor functions to deal with it
+ * @node:		node index useful for balancing
  */
 struct irq_common_data {
 	unsigned int		state_use_accessors;
+#ifdef CONFIG_SMP
+	unsigned int		node;
+#endif
 };
 
 /**
@@ -139,7 +143,6 @@ struct irq_common_data {
  * @mask:		precomputed bitmask for accessing the chip registers
  * @irq:		interrupt number
  * @hwirq:		hardware interrupt number, local to the interrupt domain
- * @node:		node index useful for balancing
  * @common:		point to data shared by all irqchips
  * @chip:		low level interrupt hardware access
  * @domain:		Interrupt translation domain; responsible for mapping
@@ -160,7 +163,6 @@ struct irq_data {
 	u32			mask;
 	unsigned int		irq;
 	unsigned long		hwirq;
-	unsigned int		node;
 	struct irq_common_data	*common;
 	struct irq_chip		*chip;
 	struct irq_domain	*domain;
@@ -634,6 +636,20 @@ static inline u32 irq_get_trigger_type(unsigned int irq)
 	return d ? irqd_get_trigger_type(d) : 0;
 }
 
+static inline int irq_common_data_get_node(struct irq_common_data *d)
+{
+#ifdef CONFIG_SMP
+	return d->node;
+#else
+	return 0;
+#endif
+}
+
+static inline int irq_data_get_node(struct irq_data *d)
+{
+	return irq_common_data_get_node(d->common);
+}
+
 unsigned int arch_dynirq_lower_bound(unsigned int from);
 
 int __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index ed84299788b3..d82a77d39aeb 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -199,6 +199,11 @@ static inline void kstat_incr_irqs_this_cpu(unsigned int irq, struct irq_desc *d
 	__this_cpu_inc(kstat.irqs_sum);
 }
 
+static inline int irq_desc_get_node(struct irq_desc *desc)
+{
+	return irq_common_data_get_node(&desc->irq_common_data);
+}
+
 #ifdef CONFIG_PM_SLEEP
 bool irq_pm_check_wakeup(struct irq_desc *desc);
 void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action);
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index eac1aac906ea..20773f073e24 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -52,23 +52,17 @@ static int alloc_masks(struct irq_desc *desc, gfp_t gfp, int node)
 
 static void desc_smp_init(struct irq_desc *desc, int node)
 {
-	desc->irq_data.node = node;
+	desc->irq_common_data.node = node;
 	cpumask_copy(desc->irq_data.affinity, irq_default_affinity);
 #ifdef CONFIG_GENERIC_PENDING_IRQ
 	cpumask_clear(desc->pending_mask);
 #endif
 }
 
-static inline int desc_node(struct irq_desc *desc)
-{
-	return desc->irq_data.node;
-}
-
 #else
 static inline int
 alloc_masks(struct irq_desc *desc, gfp_t gfp, int node) { return 0; }
 static inline void desc_smp_init(struct irq_desc *desc, int node) { }
-static inline int desc_node(struct irq_desc *desc) { return 0; }
 #endif
 
 static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node,
@@ -300,7 +294,7 @@ static void free_desc(unsigned int irq)
 	unsigned long flags;
 
 	raw_spin_lock_irqsave(&desc->lock, flags);
-	desc_set_defaults(irq, desc, desc_node(desc), NULL);
+	desc_set_defaults(irq, desc, irq_desc_get_node(desc), NULL);
 	raw_spin_unlock_irqrestore(&desc->lock, flags);
 }
 
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 3552b8750efd..93ef89059022 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -830,12 +830,12 @@ static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain,
 {
 	struct irq_data *irq_data;
 
-	irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL, child->node);
+	irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL,
+				irq_data_get_node(child));
 	if (irq_data) {
 		child->parent_data = irq_data;
 		irq_data->irq = child->irq;
 		irq_data->common = child->common;
-		irq_data->node = child->node;
 		irq_data->domain = domain;
 	}
 
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index e68932bb308e..d206aa2c3378 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -332,7 +332,7 @@ static int
 setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
 {
 	struct cpumask *set = irq_default_affinity;
-	int node = desc->irq_data.node;
+	int node = irq_desc_get_node(desc);
 
 	/* Excludes PER_CPU and NO_BALANCE interrupts */
 	if (!irq_can_set_affinity(irq))
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index df2f4642d1e7..0e97c142ce40 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -241,7 +241,7 @@ static int irq_node_proc_show(struct seq_file *m, void *v)
 {
 	struct irq_desc *desc = irq_to_desc((long) m->private);
 
-	seq_printf(m, "%d\n", desc->irq_data.node);
+	seq_printf(m, "%d\n", irq_desc_get_node(desc));
 	return 0;
 }
 
-- 
1.7.10.4