-extern ssize_t dvb_ringbuffer_read(struct dvb_ringbuffer *rbuf, u8 *buf,
- size_t len, int usermem);
+extern ssize_t dvb_ringbuffer_read_user(struct dvb_ringbuffer *rbuf,
+ u8 __user *buf, size_t len);
+extern void dvb_ringbuffer_read(struct dvb_ringbuffer *rbuf,
+ u8 *buf, size_t len);