diff --git a/drivers/media/video/et61x251/et61x251_core.c b/drivers/media/video/et61x251/et61x251_core.c
index d19d73b81edef7b37140a092b3365f2538a72480..38d2ad0aadef0f402ba0f62fe7fc533361676993 100644
--- a/drivers/media/video/et61x251/et61x251_core.c
+++ b/drivers/media/video/et61x251/et61x251_core.c
@@ -227,7 +227,7 @@ int et61x251_write_reg(struct et61x251_device* cam, u8 value, u16 index)
 }
 
 
-int et61x251_read_reg(struct et61x251_device* cam, u16 index)
+static int et61x251_read_reg(struct et61x251_device* cam, u16 index)
 {
 	struct usb_device* udev = cam->usbdev;
 	u8* buff = cam->control_buffer;
@@ -268,9 +268,9 @@ et61x251_i2c_wait(struct et61x251_device* cam,
 }
 
 
-int
-et61x251_i2c_try_read(struct et61x251_device* cam,
-		      const struct et61x251_sensor* sensor, u8 address)
+static int et61x251_i2c_try_read(struct et61x251_device* cam,
+				 const struct et61x251_sensor* sensor,
+				 u8 address)
 {
 	struct usb_device* udev = cam->usbdev;
 	u8* data = cam->control_buffer;
@@ -301,10 +301,9 @@ et61x251_i2c_try_read(struct et61x251_device* cam,
 }
 
 
-int
-et61x251_i2c_try_write(struct et61x251_device* cam,
-		       const struct et61x251_sensor* sensor, u8 address,
-		       u8 value)
+static int et61x251_i2c_try_write(struct et61x251_device* cam,
+				  const struct et61x251_sensor* sensor,
+				  u8 address, u8 value)
 {
 	struct usb_device* udev = cam->usbdev;
 	u8* data = cam->control_buffer;
@@ -387,13 +386,14 @@ et61x251_i2c_raw_write(struct et61x251_device* cam, u8 n, u8 data1, u8 data2,
 }
 
 
-int et61x251_i2c_read(struct et61x251_device* cam, u8 address)
+static int et61x251_i2c_read(struct et61x251_device* cam, u8 address)
 {
 	return et61x251_i2c_try_read(cam, &cam->sensor, address);
 }
 
 
-int et61x251_i2c_write(struct et61x251_device* cam, u8 address, u8 value)
+static int et61x251_i2c_write(struct et61x251_device* cam,
+			      u8 address, u8 value)
 {
 	return et61x251_i2c_try_write(cam, &cam->sensor, address, value);
 }
diff --git a/drivers/media/video/et61x251/et61x251_sensor.h b/drivers/media/video/et61x251/et61x251_sensor.h
index e1458633062351d337f569681dc5e92870844618..71a03148cb092b17e4aa76d5f97fc176ef60f6cf 100644
--- a/drivers/media/video/et61x251/et61x251_sensor.h
+++ b/drivers/media/video/et61x251/et61x251_sensor.h
@@ -52,14 +52,6 @@ et61x251_attach_sensor(struct et61x251_device* cam,
 /*****************************************************************************/
 
 extern int et61x251_write_reg(struct et61x251_device*, u8 value, u16 index);
-extern int et61x251_read_reg(struct et61x251_device*, u16 index);
-extern int et61x251_i2c_write(struct et61x251_device*, u8 address, u8 value);
-extern int et61x251_i2c_read(struct et61x251_device*, u8 address);
-extern int et61x251_i2c_try_write(struct et61x251_device*,
-				  const struct et61x251_sensor*, u8 address,
-				  u8 value);
-extern int et61x251_i2c_try_read(struct et61x251_device*,
-				 const struct et61x251_sensor*, u8 address);
 extern int et61x251_i2c_raw_write(struct et61x251_device*, u8 n, u8 data1,
 				  u8 data2, u8 data3, u8 data4, u8 data5,
 				  u8 data6, u8 data7, u8 data8, u8 address);