From a8df7b1ab70bfd6f261fa5e96985fca638299acc Mon Sep 17 00:00:00 2001 From: Fabio Baltieri Date: Sun, 4 Nov 2012 01:54:34 -0800 Subject: leds: add led_trigger_rename function Implements a "led_trigger_rename" function to rename a trigger with proper locking. This assumes that led name was originally allocated in non-constant storage. Signed-off-by: Fabio Baltieri Cc: Kurt Van Dijck Signed-off-by: Bryan Wu --- drivers/leds/led-triggers.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'drivers/leds/led-triggers.c') diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c index 262eb4193710..a4fa4bf02d53 100644 --- a/drivers/leds/led-triggers.c +++ b/drivers/leds/led-triggers.c @@ -166,6 +166,19 @@ void led_trigger_set_default(struct led_classdev *led_cdev) } EXPORT_SYMBOL_GPL(led_trigger_set_default); +void led_trigger_rename_static(const char *name, struct led_trigger *trig) +{ + /* new name must be on a temporary string to prevent races */ + BUG_ON(name == trig->name); + + down_write(&triggers_list_lock); + /* this assumes that trig->name was originaly allocated to + * non constant storage */ + strcpy((char *)trig->name, name); + up_write(&triggers_list_lock); +} +EXPORT_SYMBOL_GPL(led_trigger_rename_static); + /* LED Trigger Interface */ int led_trigger_register(struct led_trigger *trig) -- cgit v1.2.3