extern void cb_in_1(struct pcbit_dev * dev, struct pcbit_chan* chan,
struct callb_data *data);
extern void cb_in_2(struct pcbit_dev * dev, struct pcbit_chan* chan,
extern void cb_in_1(struct pcbit_dev * dev, struct pcbit_chan* chan,
struct callb_data *data);
extern void cb_in_2(struct pcbit_dev * dev, struct pcbit_chan* chan,