* [PATCH] input: make USB device id constant
@ 2010-01-10 10:51 Németh Márton
0 siblings, 0 replies; only message in thread
From: Németh Márton @ 2010-01-10 10:51 UTC (permalink / raw)
To: Dmitry Torokhov, Daniel Ritz; +Cc: LKML, cocci, linux-input
From: Márton Németh <nm127@freemail.hu>
The id_table field of the struct usb_device_id is constant in <linux/usb.h>
so it is worth to make the initialization data also constant.
The semantic match that finds this kind of pattern is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@r@
disable decl_init,const_decl_init;
identifier I1, I2, x;
@@
struct I1 {
...
const struct I2 *x;
...
};
@s@
identifier r.I1, y;
identifier r.x, E;
@@
struct I1 y = {
.x = E,
};
@c@
identifier r.I2;
identifier s.E;
@@
const struct I2 E[] = ... ;
@depends on !c@
identifier r.I2;
identifier s.E;
@@
+ const
struct I2 E[] = ...;
// </smpl>
Signed-off-by: Márton Németh <nm127@freemail.hu>
Cc: Julia Lawall <julia@diku.dk>
Cc: cocci@diku.dk
---
diff -u -p a/drivers/input/tablet/gtco.c b/drivers/input/tablet/gtco.c
--- a/drivers/input/tablet/gtco.c 2009-12-03 04:51:21.000000000 +0100
+++ b/drivers/input/tablet/gtco.c 2010-01-08 19:11:02.000000000 +0100
@@ -92,7 +92,7 @@ Scott Hill shill@gtcocalcomp.com
/* DATA STRUCTURES */
/* Device table */
-static struct usb_device_id gtco_usbid_table [] = {
+static const struct usb_device_id gtco_usbid_table[] = {
{ USB_DEVICE(VENDOR_ID_GTCO, PID_400) },
{ USB_DEVICE(VENDOR_ID_GTCO, PID_401) },
{ USB_DEVICE(VENDOR_ID_GTCO, PID_1000) },
diff -u -p a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
--- a/drivers/input/touchscreen/usbtouchscreen.c 2010-01-07 19:08:40.000000000 +0100
+++ b/drivers/input/touchscreen/usbtouchscreen.c 2010-01-08 19:17:10.000000000 +0100
@@ -144,7 +144,7 @@ enum {
.bInterfaceClass = USB_INTERFACE_CLASS_HID, \
.bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
-static struct usb_device_id usbtouch_devices[] = {
+static const struct usb_device_id usbtouch_devices[] = {
#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
/* ignore the HID capable devices, handled by usbhid */
{USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
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