int lfsck_set_speed(struct dt_device *key, __u32 val);
int lfsck_get_windows(char *buf, struct dt_device *key);
int lfsck_set_windows(struct dt_device *key, unsigned int val);
int lfsck_set_speed(struct dt_device *key, __u32 val);
int lfsck_get_windows(char *buf, struct dt_device *key);
int lfsck_set_windows(struct dt_device *key, unsigned int val);