staging: comedi: comedi_buf: don't expose comedi_buf_read_n_allocated()

This helper function is only called in comedi_buf.c. Move it there and
make it static so it's not exposed globally.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/comedi_buf.c

@@ -309,6 +309,11 @@ unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes)
 }
 EXPORT_SYMBOL(comedi_buf_read_alloc);
 
+static unsigned int comedi_buf_read_n_allocated(struct comedi_async *async)
+{
+	return async->buf_read_alloc_count - async->buf_read_count;
+}
+
 /* transfers control of a chunk from reader to free buffer space */
 unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes)
 {

drivers/staging/comedi/comedidev.h

@@ -453,11 +453,6 @@ static inline unsigned comedi_buf_write_n_allocated(struct comedi_async *async)
 	return async->buf_write_alloc_count - async->buf_write_count;
 }
 
-static inline unsigned comedi_buf_read_n_allocated(struct comedi_async *async)
-{
-	return async->buf_read_alloc_count - async->buf_read_count;
-}
-
 int comedi_alloc_subdevice_minor(struct comedi_device *dev,
 				 struct comedi_subdevice *s);
 void comedi_free_subdevice_minor(struct comedi_subdevice *s);