D32504.id96890.diff
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	Index: sys/kern/subr_intr.c
	===================================================================
	--- sys/kern/subr_intr.c
	+++ sys/kern/subr_intr.c
	@@ -511,6 +511,17 @@
	return (error);
	}

	+/*
	+ * Lookup an interrupt source by irq.
	+ */
	+struct intr_irqsrc *
	+intr_isrc_lookup(u_int irq)
	+{
	+ if (irq >= intr_nirq)
	+ return (NULL);
	+ return (irq_sources[irq]);
	+}
	+
	#ifdef SMP
	/*
	* A support function for a PIC to decide if provided ISRC should be inited
	Index: sys/sys/intr.h
	===================================================================
	--- sys/sys/intr.h
	+++ sys/sys/intr.h
	@@ -102,6 +102,7 @@
	int intr_isrc_deregister(struct intr_irqsrc *);
	int intr_isrc_register(struct intr_irqsrc , device_t, u_int, const char , ...)
	__printflike(4, 5);
	+struct intr_irqsrc *intr_isrc_lookup(u_int irq);

	#ifdef SMP
	bool intr_isrc_init_on_cpu(struct intr_irqsrc *isrc, u_int cpu);