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authorAniroop Mathur <aniroop.mathur@gmail.com>2014-12-03 02:22:28 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2014-12-03 08:34:49 +0300
commit9c7d66fa9bb21ef89c6acdd0cf536eb84e760d8b (patch)
treeb98a6234464d403c1451f2b4ea94472b6e0970ad /drivers/input/input.c
parent8195077c4a93486f715edac3e9f1503df7dec60a (diff)
downloadlinux-9c7d66fa9bb21ef89c6acdd0cf536eb84e760d8b.tar.xz
Input: initialize input_no to -1 to avoid subtraction
Let's initializes input_no to -1 in order to avoid extra subtraction operation performed every time we allocate an input device. Signed-off-by: Aniroop Mathur <aniroop.mathur@gmail.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/input.c')
-rw-r--r--drivers/input/input.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 0f175f55782b..04217c2e345c 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -1775,7 +1775,7 @@ 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);
@@ -1790,7 +1790,7 @@ struct input_dev *input_allocate_device(void)
INIT_LIST_HEAD(&dev->node);
dev_set_name(&dev->dev, "input%lu",
- (unsigned long) atomic_inc_return(&input_no) - 1);
+ (unsigned long)atomic_inc_return(&input_no));
__module_get(THIS_MODULE);
}