From patchwork Tue Oct 28 11:01:43 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Lothar_Wa=C3=9Fmann?= X-Patchwork-Id: 404189 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id ACFD314003E for ; Tue, 28 Oct 2014 22:21:19 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756988AbaJ1LUP (ORCPT ); Tue, 28 Oct 2014 07:20:15 -0400 Received: from mail.karo-electronics.de ([81.173.242.67]:64421 "EHLO mail.karo-electronics.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753852AbaJ1LCE (ORCPT ); Tue, 28 Oct 2014 07:02:04 -0400 From: =?UTF-8?q?Lothar=20Wa=C3=9Fmann?= To: netdev@vger.kernel.org Cc: "David S. Miller" , Russell King , Frank Li , Fabio Estevam , linux-kernel@vger.kernel.org, =?UTF-8?q?Lothar=20Wa=C3=9Fmann?= , Subject: [PATCHv2 5/6] net: fec: simplify loop counter handling in swap_buffer() Date: Tue, 28 Oct 2014 12:01:43 +0100 Message-Id: <1414494104-27943-6-git-send-email-LW@KARO-electronics.de> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1414494104-27943-1-git-send-email-LW@KARO-electronics.de> References: <1414494104-27943-1-git-send-email-LW@KARO-electronics.de> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Eliminate the DIV_ROUND_UP() and change the loop counter increment to 4 instead. This results in saving 6 instructions in the functions assembly code. Signed-off-by: Lothar Waßmann --- drivers/net/ethernet/freescale/fec_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index 3a103e9..404fb9d 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -333,7 +333,7 @@ static void *swap_buffer(void *bufaddr, int len) int i; unsigned int *buf = bufaddr; - for (i = 0; i < DIV_ROUND_UP(len, 4); i++, buf++) + for (i = 0; i < len; i += 4, buf++) swab32s(buf); return bufaddr;