From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933156AbdGSWte (ORCPT ); Wed, 19 Jul 2017 18:49:34 -0400 Received: from gateway22.websitewelcome.com ([192.185.46.126]:35609 "EHLO gateway22.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932142AbdGSWtd (ORCPT ); Wed, 19 Jul 2017 18:49:33 -0400 Date: Wed, 19 Jul 2017 17:49:31 -0500 From: "Gustavo A. R. Silva" To: Marcel Holtmann , Gustavo Padovan , Johan Hedberg Cc: linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH] bluetooth: btwilink: remove unnecessary static in bt_ti_probe() Message-ID: <20170719224931.GA16225@embeddedgus> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 189.152.228.197 X-Exim-ID: 1dXxmd-00231A-Tb X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedgus) [189.152.228.197]:60430 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 14 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Remove unnecessary static on local variable hst. Such variable is initialized before being used, on every execution path throughout the function. The static has no benefit and, removing it reduces the object file size. This issue was detected using Coccinelle and the following semantic patch: @bad exists@ position p; identifier x; type T; @@ static T x@p; ... x = <+...x...+> @@ identifier x; expression e; type T; position p != bad.p; @@ -static T x@p; ... when != x when strict ?x = e; In the following log you can see the difference in the object file size. This log is the output of the size command, before and after the code change: before: text data bss dec hex filename 4029 2528 128 6685 1a1d drivers/bluetooth/btwilink.o after: text data bss dec hex filename 4007 2472 64 6543 198f drivers/bluetooth/btwilink.o Signed-off-by: Gustavo A. R. Silva --- drivers/bluetooth/btwilink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/bluetooth/btwilink.c b/drivers/bluetooth/btwilink.c index 85a3978..0cdb896 100644 --- a/drivers/bluetooth/btwilink.c +++ b/drivers/bluetooth/btwilink.c @@ -276,7 +276,7 @@ static int ti_st_send_frame(struct hci_dev *hdev, struct sk_buff *skb) static int bt_ti_probe(struct platform_device *pdev) { - static struct ti_st *hst; + struct ti_st *hst; struct hci_dev *hdev; int err; -- 2.5.0