linux-kernel - [PATCH] pcmcia: make Open Firmware device id constant

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Message-ID: <4B4C2B1D.9030401@freemail.hu>
Date:	Tue, 12 Jan 2010 08:56:13 +0100
From:	Németh Márton <nm127@...email.hu>
To:	linux-pcmcia@...ts.infradead.org
CC:	LKML <linux-kernel@...r.kernel.org>, Julia Lawall <julia@...u.dk>,
	cocci@...u.dk
Subject: [PATCH] pcmcia: make Open Firmware device id constant

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

The match_table field of the struct of_device_id is constant in <linux/of_platform.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@...email.hu>
Cc: Julia Lawall <julia@...u.dk>
Cc: cocci@...u.dk
---
diff -u -p a/drivers/pcmcia/electra_cf.c b/drivers/pcmcia/electra_cf.c
--- a/drivers/pcmcia/electra_cf.c 2009-12-03 04:51:21.000000000 +0100
+++ b/drivers/pcmcia/electra_cf.c 2010-01-08 14:35:41.000000000 +0100
@@ -347,7 +347,7 @@ static int __devexit electra_cf_remove(s
 	return 0;
 }

-static struct of_device_id electra_cf_match[] = {
+static const struct of_device_id electra_cf_match[] = {
 	{
 		.compatible   = "electra-cf",
 	},
diff -u -p a/drivers/pcmcia/m8xx_pcmcia.c b/drivers/pcmcia/m8xx_pcmcia.c
--- a/drivers/pcmcia/m8xx_pcmcia.c 2010-01-07 19:08:44.000000000 +0100
+++ b/drivers/pcmcia/m8xx_pcmcia.c 2010-01-08 14:36:19.000000000 +0100
@@ -1303,7 +1303,7 @@ static int m8xx_resume(struct platform_d
 #define m8xx_resume NULL
 #endif

-static struct of_device_id m8xx_pcmcia_match[] = {
+static const struct of_device_id m8xx_pcmcia_match[] = {
 	{
 	 .type = "pcmcia",
 	 .compatible = "fsl,pq-pcmcia",
--
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