linux-kernel - [PATCH 4/5] input: make pnp device id constant

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Date:	Sat, 09 Jan 2010 13:56:11 +0100
From:	Németh Márton <nm127@...email.hu>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Vojtech Pavlik <vojtech@....cz>
CC:	linux-input@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 4/5] input: make pnp device id constant

From: Márton Németh <nm127@...email.hu>

The id_table field of the struct pnp_driver is constant in <linux/pnp.h>
so it is worth to make pnp_devids 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@...email.hu>
Cc: Julia Lawall <julia@...u.dk>
Cc: cocci@...u.dk
---
diff -u -p a/drivers/input/gameport/ns558.c b/drivers/input/gameport/ns558.c
--- a/drivers/input/gameport/ns558.c 2009-12-03 04:51:21.000000000 +0100
+++ b/drivers/input/gameport/ns558.c 2010-01-08 19:23:15.000000000 +0100
@@ -166,7 +166,7 @@ static int ns558_isa_probe(int io)

 #ifdef CONFIG_PNP

-static struct pnp_device_id pnp_devids[] = {
+static const struct pnp_device_id pnp_devids[] = {
 	{ .id = "@P@...1", .driver_data = 0 }, /* ALS 100 */
 	{ .id = "@P@...0", .driver_data = 0 }, /* ALS 200 */
 	{ .id = "@P@...1", .driver_data = 0 }, /* ALS 100+ */
--
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