This patch initializes input_no by -1 in order to avoid extra subtraction
operation performed everytime for allocation of an input device.
Signed-off-by: Aniroop Mathur <aniroop.mat...@gmail.com>
---
drivers/input/input.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 29ca0bb..01fe49e 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -1774,7 +1774,7 @@ EXPORT_SYMBOL_GPL(input_class);
*/
struct input_dev *input_allocate_device(void)
{
- static atomic_t input_no = ATOMIC_INIT(0);
+ static atomic_t input_no = ATOMIC_INIT(-1);
struct input_dev *dev;
dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL);
@@ -1789,7 +1789,7 @@ struct input_dev *input_allocate_device(void)
INIT_LIST_HEAD(&dev->node);
dev_set_name(&dev->dev, "input%ld",
- (unsigned long) atomic_inc_return(&input_no) - 1);
+ (unsigned long) atomic_inc_return(&input_no));
__module_get(THIS_MODULE);
}
--
1.9.1
--
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