linux-kernel - [PATCH] bluetooth: make USB device id constant

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Message-ID: <4B49CA73.1080902@freemail.hu>
Date:	Sun, 10 Jan 2010 13:39:15 +0100
From:	Németh Márton <nm127@...email.hu>
To:	Marcel Holtmann <marcel@...tmann.org>
CC:	Maxim Krasnyansky <maxk@...lcomm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Julia Lawall <julia@...u.dk>, cocci@...u.dk
Subject: [PATCH] bluetooth: 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 bcm203x_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/bluetooth/bcm203x.c b/drivers/bluetooth/bcm203x.c
--- a/drivers/bluetooth/bcm203x.c 2009-12-03 04:51:21.000000000 +0100
+++ b/drivers/bluetooth/bcm203x.c 2010-01-08 11:29:05.000000000 +0100
@@ -39,7 +39,7 @@

 #define VERSION "1.2"

-static struct usb_device_id bcm203x_table[] = {
+static const struct usb_device_id bcm203x_table[] = {
 	/* Broadcom Blutonium (BCM2033) */
 	{ USB_DEVICE(0x0a5c, 0x2033) },

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