#define PCSPK_MIN_COUNT DIV_ROUND_UP(PIT_FREQ, PCSPK_MAX_FREQ)
typedef struct PCSpkState PCSpkState;
-#define PC_SPEAKER(obj) OBJECT_CHECK(PCSpkState, (obj), TYPE_PC_SPEAKER)
+DECLARE_INSTANCE_CHECKER(PCSpkState, PC_SPEAKER,
+ TYPE_PC_SPEAKER)
struct PCSpkState {
ISADevice parent_obj;