diff --git a/drivers/staging/comedi/comedi_buf.c b/drivers/staging/comedi/comedi_buf.c
index c562346e4429..ac5f0a91e93b 100644
--- a/drivers/staging/comedi/comedi_buf.c
+++ b/drivers/staging/comedi/comedi_buf.c
@@ -255,7 +255,8 @@ unsigned int comedi_buf_write_n_allocated(struct comedi_async *async)
 }
 
 /* transfers a chunk from writer to filled buffer space */
-unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes)
+unsigned int comedi_buf_write_free(struct comedi_async *async,
+				   unsigned int nbytes)
 {
 	unsigned int allocated = comedi_buf_write_n_allocated(async);
 
@@ -294,7 +295,8 @@ unsigned int comedi_buf_read_n_available(struct comedi_async *async)
 EXPORT_SYMBOL(comedi_buf_read_n_available);
 
 /* allocates a chunk for the reader from filled (and munged) buffer space */
-unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes)
+unsigned int comedi_buf_read_alloc(struct comedi_async *async,
+				   unsigned int nbytes)
 {
 	unsigned int available;
 
@@ -320,7 +322,8 @@ static unsigned int comedi_buf_read_n_allocated(struct comedi_async *async)
 }
 
 /* transfers control of a chunk from reader to free buffer space */
-unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes)
+unsigned int comedi_buf_read_free(struct comedi_async *async,
+				  unsigned int nbytes)
 {
 	unsigned int allocated;
 
diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index 140678da55d4..85b84b0d51dd 100644
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -435,15 +435,16 @@ comedi_to_usb_interface(struct comedi_device *dev)
 	return dev->hw_dev ? to_usb_interface(dev->hw_dev) : NULL;
 }
 
-int comedi_buf_put(struct comedi_async *async, short x);
-int comedi_buf_get(struct comedi_async *async, short *x);
+unsigned int comedi_buf_write_alloc(struct comedi_async *, unsigned int);
+unsigned int comedi_buf_write_free(struct comedi_async *, unsigned int);
+
+unsigned int comedi_buf_read_n_available(struct comedi_async *);
+unsigned int comedi_buf_read_alloc(struct comedi_async *, unsigned int);
+unsigned int comedi_buf_read_free(struct comedi_async *, unsigned int);
+
+int comedi_buf_put(struct comedi_async *, short);
+int comedi_buf_get(struct comedi_async *, short *);
 
-unsigned int comedi_buf_write_alloc(struct comedi_async *async,
-				    unsigned int nbytes);
-unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes);
-unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes);
-unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes);
-unsigned int comedi_buf_read_n_available(struct comedi_async *async);
 void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset,
 			  const void *source, unsigned int num_bytes);
 void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset,