linux-kernel - [PATCH 2/3] nand: make USB device id constant

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Message-ID: <4B488E60.4070604@freemail.hu>
Date:	Sat, 09 Jan 2010 15:10:40 +0100
From:	Németh Márton <nm127@...email.hu>
To:	David Woodhouse <dwmw2@...radead.org>
CC:	linux-mtd@...ts.infradead.org, Julia Lawall <julia@...u.dk>,
	cocci@...u.dk, LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/3] nand: make USB device id constant

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

The id_table field of the struct usb_device_id is constant in <linux/usb.h>
so it is worth to make alauda_table 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/mtd/nand/alauda.c b/drivers/mtd/nand/alauda.c
--- a/drivers/mtd/nand/alauda.c 2010-01-07 19:08:42.000000000 +0100
+++ b/drivers/mtd/nand/alauda.c 2010-01-08 04:26:29.000000000 +0100
@@ -49,7 +49,7 @@

 #define TIMEOUT HZ

-static struct usb_device_id alauda_table [] = {
+static const struct usb_device_id alauda_table[] = {
 	{ USB_DEVICE(0x0584, 0x0008) },	/* Fujifilm DPC-R1 */
 	{ USB_DEVICE(0x07b4, 0x010a) },	/* Olympus MAUSB-10 */
 	{ }
--
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