1 files changed, 25 insertions, 9 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 83a4574308fa..c3eb89606c2b 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -151,7 +151,9 @@ struct irq_common_data {
 #endif
 	void			*handler_data;
 	struct msi_desc		*msi_desc;
+#ifdef CONFIG_SMP
 	cpumask_var_t		affinity;
+#endif
 #ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
 	cpumask_var_t		effective_affinity;
 #endif
@@ -879,21 +881,34 @@ static inline int irq_data_get_node(struct irq_data *d)
 	return irq_common_data_get_node(d->common);
 }
 
-static inline struct cpumask *irq_get_affinity_mask(int irq)
+static inline
+const struct cpumask *irq_data_get_affinity_mask(struct irq_data *d)
 {
-	struct irq_data *d = irq_get_irq_data(irq);
+#ifdef CONFIG_SMP
+	return d->common->affinity;
+#else
+	return cpumask_of(0);
+#endif
+}
 
-	return d ? d->common->affinity : NULL;
+static inline void irq_data_update_affinity(struct irq_data *d,
+					    const struct cpumask *m)
+{
+#ifdef CONFIG_SMP
+	cpumask_copy(d->common->affinity, m);
+#endif
 }
 
-static inline struct cpumask *irq_data_get_affinity_mask(struct irq_data *d)
+static inline const struct cpumask *irq_get_affinity_mask(int irq)
 {
-	return d->common->affinity;
+	struct irq_data *d = irq_get_irq_data(irq);
+
+	return d ? irq_data_get_affinity_mask(d) : NULL;
 }
 
 #ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
 static inline
-struct cpumask *irq_data_get_effective_affinity_mask(struct irq_data *d)
+const struct cpumask *irq_data_get_effective_affinity_mask(struct irq_data *d)
 {
 	return d->common->effective_affinity;
 }
@@ -908,13 +923,14 @@ static inline void irq_data_update_effective_affinity(struct irq_data *d,
 {
 }
 static inline
-struct cpumask *irq_data_get_effective_affinity_mask(struct irq_data *d)
+const struct cpumask *irq_data_get_effective_affinity_mask(struct irq_data *d)
 {
-	return d->common->affinity;
+	return irq_data_get_affinity_mask(d);
 }
 #endif
 
-static inline struct cpumask *irq_get_effective_affinity_mask(unsigned int irq)
+static inline
+const struct cpumask *irq_get_effective_affinity_mask(unsigned int irq)
 {
 	struct irq_data *d = irq_get_irq_data(irq);