From: Aniroop Mathur Date: Tue, 2 Dec 2014 23:22:28 +0000 (-0800) Subject: Input: initialize input_no to -1 to avoid subtraction X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9c7d66fa9bb21ef89c6acdd0cf536eb84e760d8b;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 Signed-off-by: Dmitry Torokhov --- 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); }