From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aniroop Mathur Subject: [PATCH] Input: Initialize input_no by -1 Date: Sat, 22 Nov 2014 00:18:39 +0530 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: Received: from mail-la0-f46.google.com ([209.85.215.46]:58681 "EHLO mail-la0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750807AbaKUSsl (ORCPT ); Fri, 21 Nov 2014 13:48:41 -0500 Received: by mail-la0-f46.google.com with SMTP id gd6so4836657lab.33 for ; Fri, 21 Nov 2014 10:48:39 -0800 (PST) Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Dmitry Torokhov , "linux-input@vger.kernel.org" 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 --- 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