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| author | Fabio Baltieri <fabio.baltieri@gmail.com> | 2012-11-04 01:54:34 -0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@gmail.com> | 2012-11-26 14:28:50 -0800 |
| commit | a8df7b1ab70bfd6f261fa5e96985fca638299acc (patch) | |
| tree | 92e50e11054d9182757899e9c16070dbffadc83b /drivers/leds/led-triggers.c | |
| parent | 5cce0105c8d07d3bd5f578c77d273e1a1e09f157 (diff) | |
| download | op-kernel-dev-a8df7b1ab70bfd6f261fa5e96985fca638299acc.zip op-kernel-dev-a8df7b1ab70bfd6f261fa5e96985fca638299acc.tar.gz | |
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 <fabio.baltieri@gmail.com>
Cc: Kurt Van Dijck <kurt.van.dijck@eia.be>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'drivers/leds/led-triggers.c')
| -rw-r--r-- | drivers/leds/led-triggers.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c index 262eb41..a4fa4bf 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) |
