[PATCH] Documentation: rs485: Do not define manually the ioctl

[Ricardo Ribalda Delgado]

It is not a very good practice to define the IOCTL manually instead of
using the header file.

Fix it on the documentation example.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx>
---
 Documentation/serial/serial-rs485.txt | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/Documentation/serial/serial-rs485.txt b/Documentation/serial/serial-rs485.txt
index 2253b8b45a74..389fcd4759e9 100644
--- a/Documentation/serial/serial-rs485.txt
+++ b/Documentation/serial/serial-rs485.txt
@@ -45,9 +45,8 @@
 
 	#include <linux/serial.h>
 
-	/* RS485 ioctls: */
-	#define TIOCGRS485      0x542E
-	#define TIOCSRS485      0x542F
+	/* Include definition for RS485 ioctls: TIOCGRS485 and TIOCSRS485 */
+	#include <sys/ioctl.h>
 
 	/* Open your specific device (e.g., /dev/mydevice): */
 	int fd = open ("/dev/mydevice", O_RDWR);
-- 
2.8.1