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

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Message-ID: <4B49C496.2090507@freemail.hu>
Date:	Sun, 10 Jan 2010 13:14:14 +0100
From:	Németh Márton <nm127@...email.hu>
To:	David Brownell <dbrownell@...rs.sourceforge.net>,
	Grant Likely <grant.likely@...retlab.ca>
CC:	spi-devel-general@...ts.sourceforge.net,
	LKML <linux-kernel@...r.kernel.org>,
	Julia Lawall <julia@...u.dk>, cocci@...u.dk
Subject: [PATCH] spi: 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 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/spi/xilinx_spi_of.c b/drivers/spi/xilinx_spi_of.c
--- a/drivers/spi/xilinx_spi_of.c 2010-01-07 19:08:45.000000000 +0100
+++ b/drivers/spi/xilinx_spi_of.c 2010-01-08 09:11:27.000000000 +0100
@@ -99,7 +99,7 @@ static int __exit xilinx_spi_of_remove(s
 	return xilinx_spi_remove(op);
 }

-static struct of_device_id xilinx_spi_of_match[] = {
+static const struct of_device_id xilinx_spi_of_match[] = {
 	{ .compatible = "xlnx,xps-spi-2.00.a", },
 	{ .compatible = "xlnx,xps-spi-2.00.b", },
 	{}
diff -u -p a/drivers/spi/mpc52xx_spi.c b/drivers/spi/mpc52xx_spi.c
--- a/drivers/spi/mpc52xx_spi.c 2010-01-07 19:08:45.000000000 +0100
+++ b/drivers/spi/mpc52xx_spi.c 2010-01-08 09:11:55.000000000 +0100
@@ -550,7 +550,7 @@ static int __devexit mpc52xx_spi_remove(
 	return 0;
 }

-static struct of_device_id mpc52xx_spi_match[] __devinitdata = {
+static const struct of_device_id mpc52xx_spi_match[] __devinitconst = {
 	{ .compatible = "fsl,mpc5200-spi", },
 	{}
 };
diff -u -p a/drivers/spi/mpc52xx_psc_spi.c b/drivers/spi/mpc52xx_psc_spi.c
--- a/drivers/spi/mpc52xx_psc_spi.c 2010-01-07 19:08:45.000000000 +0100
+++ b/drivers/spi/mpc52xx_psc_spi.c 2010-01-08 09:13:23.000000000 +0100
@@ -503,7 +503,7 @@ static int __exit mpc52xx_psc_spi_of_rem
 	return mpc52xx_psc_spi_do_remove(&op->dev);
 }

-static struct of_device_id mpc52xx_psc_spi_of_match[] = {
+static const struct of_device_id mpc52xx_psc_spi_of_match[] = {
 	{ .compatible = "fsl,mpc5200-psc-spi", },
 	{ .compatible = "mpc5200-psc-spi", }, /* old */
 	{}
diff -u -p a/drivers/spi/spi_ppc4xx.c b/drivers/spi/spi_ppc4xx.c
--- a/drivers/spi/spi_ppc4xx.c 2009-12-03 04:51:21.000000000 +0100
+++ b/drivers/spi/spi_ppc4xx.c 2010-01-08 09:13:36.000000000 +0100
@@ -578,7 +578,7 @@ static int __exit spi_ppc4xx_of_remove(s
 	return 0;
 }

-static struct of_device_id spi_ppc4xx_of_match[] = {
+static const struct of_device_id spi_ppc4xx_of_match[] = {
 	{ .compatible = "ibm,ppc4xx-spi", },
 	{},
 };
--
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