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	* An interrupt source. The upper-layer code uses the PIC methods to			* An interrupt source. The upper-layer code uses the PIC methods to
	* control a given source. The lower-layer PIC drivers can store additional			* control a given source. The lower-layer PIC drivers can store additional
	* private data in a given interrupt source such as an interrupt pin number			* private data in a given interrupt source such as an interrupt pin number
	* or an I/O APIC pointer.			* or an I/O APIC pointer.
	*/			*/
	struct intsrc {			struct intsrc {
	struct pic *is_pic;			struct pic *is_pic;
	struct intr_event *is_event;			struct intr_event *is_event;
	u_long *is_count;
	u_long *is_straycount;
	u_int is_index;
	u_int is_handlers;			u_int is_handlers;
	u_int is_domain;			u_int is_domain;
	u_int is_cpu;			u_int is_cpu;
	};			};

	struct trapframe;			struct trapframe;

	#ifdef SMP			#ifdef SMP
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