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-rw-r--r--kernel/irq/handle.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 6492400cb50..4db7d2df86b 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -203,7 +203,7 @@ out_unlock:
return desc;
}
-#else
+#else /* !CONFIG_SPARSE_IRQ */
struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
[0 ... NR_IRQS-1] = {
@@ -218,7 +218,16 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
}
};
-#endif
+struct irq_desc *irq_to_desc(unsigned int irq)
+{
+ return (irq < NR_IRQS) ? irq_desc + irq : NULL;
+}
+
+struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu)
+{
+ return irq_to_desc(irq);
+}
+#endif /* !CONFIG_SPARSE_IRQ */
/*
* What should we do if we get a hw irq event on an illegal vector?