Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752324AbdGDWgz (ORCPT ); Tue, 4 Jul 2017 18:36:55 -0400 Received: from gateway24.websitewelcome.com ([192.185.51.110]:29593 "EHLO gateway24.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752204AbdGDWgy (ORCPT ); Tue, 4 Jul 2017 18:36:54 -0400 Date: Tue, 4 Jul 2017 17:36:50 -0500 From: "Gustavo A. R. Silva" To: Michael Turquette , Stephen Boyd Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH v2] clk: moxart: remove unnecessary statics Message-ID: <20170704223650.GA22546@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: 189.152.164.199 X-Exim-ID: 1dSWR9-00314L-HV X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedgus) [189.152.164.199]:45726 X-Source-Auth: garsilva@embeddedor.com X-Email-Count: 8 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1924 Lines: 76 Remove unnecessary static on local variable _base_ in both functions moxart_of_pll_clk_init() and moxart_of_apb_clk_init(). Such variables are initialized before being used, on every execution path throughout the mentioned functions. The statics have no benefit and, removing them reduce the code 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 code size. Also, notice that the bss segment is reduced down to zero. This log is the output of the size command, before and after the code change: before: text data bss dec hex filename 1724 384 128 2236 8bc drivers/clk/clk-moxart.o after: text data bss dec hex filename 1697 240 0 1937 791 drivers/clk/clk-moxart.o Signed-off-by: Gustavo A. R. Silva --- Changes in v2: Remove static on local variable _base_ in function moxart_of_apb_clk_init() drivers/clk/clk-moxart.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/clk/clk-moxart.c b/drivers/clk/clk-moxart.c index b86dac8..1f66ccb 100644 --- a/drivers/clk/clk-moxart.c +++ b/drivers/clk/clk-moxart.c @@ -18,7 +18,7 @@ static void __init moxart_of_pll_clk_init(struct device_node *node) { - static void __iomem *base; + void __iomem *base; struct clk_hw *hw; struct clk *ref_clk; unsigned int mul; @@ -57,7 +57,7 @@ CLK_OF_DECLARE(moxart_pll_clock, "moxa,moxart-pll-clock", static void __init moxart_of_apb_clk_init(struct device_node *node) { - static void __iomem *base; + void __iomem *base; struct clk_hw *hw; struct clk *pll_clk; unsigned int div, val; -- 2.5.0