genirq: Add a helper to spread an affinity mask for MSI/MSI-X vectors

[cascardo/linux.git] / include / linux / interrupt.h

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 9fcabeb..b6683f0 100644 (file)
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -278,6 +278,8 @@ extern int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m);
 extern int
 irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify);
 
+struct cpumask *irq_create_affinity_mask(unsigned int *nr_vecs);
+
 #else /* CONFIG_SMP */
 
 static inline int irq_set_affinity(unsigned int irq, const struct cpumask *m)
@@ -308,6 +310,12 @@ irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify)
 {
        return 0;
 }
+
+static inline struct cpumask *irq_create_affinity_mask(unsigned int *nr_vecs)
+{
+       *nr_vecs = 1;
+       return NULL;
+}
 #endif /* CONFIG_SMP */
 
 /*