linux-kernel - [PATCH] leds: make the default trigger name const

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Date:	Mon, 22 Sep 2008 15:37:53 -0700
From:	Trent Piepho <tpiepho@...escale.com>
To:	linux-kernel@...r.kernel.org
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Trent Piepho <tpiepho@...escale.com>,
	Richard Purdie <rpurdie@...ys.net>
Subject: [PATCH] leds: make the default trigger name const

The default_trigger fields of struct gpio_led and thus struct led_classdev
are pretty much always assigned from a string literal, which means the
string can't be modified.  Which is fine, since there is no reason to
modify the string and in fact it never is.

But they should be marked const to prevent such code from being added, to
prevent warnings if -Wwrite-strings is used, when assigned from a constant
string other than a string literal (which produces a warning under current
kernel compiler flags), and for general good coding practices.

Signed-off-by: Trent Piepho <tpiepho@...escale.com>
CC: Richard Purdie <rpurdie@...ys.net>
---
 include/linux/leds.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/leds.h b/include/linux/leds.h
index d41ccb5..d3a73f5 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -123,7 +123,7 @@ extern void ledtrig_ide_activity(void);
  */
 struct led_info {
 	const char	*name;
-	char		*default_trigger;
+	const char	*default_trigger;
 	int		flags;
 };
 
@@ -135,7 +135,7 @@ struct led_platform_data {
 /* For the leds-gpio driver */
 struct gpio_led {
 	const char *name;
-	char *default_trigger;
+	const char *default_trigger;
 	unsigned 	gpio;
 	u8 		active_low;
 };
-- 
1.5.4.1

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