From patchwork Mon Nov 17 09:51:23 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: 411482 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 0171614010F for ; Mon, 17 Nov 2014 20:51:57 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752229AbaKQJvy (ORCPT ); Mon, 17 Nov 2014 04:51:54 -0500 Received: from mail.karo-electronics.de ([81.173.242.67]:53279 "EHLO mail.karo-electronics.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752198AbaKQJvn (ORCPT ); Mon, 17 Nov 2014 04:51:43 -0500 From: =?UTF-8?q?Lothar=20Wa=C3=9Fmann?= To: "David S. Miller" Cc: =?UTF-8?q?Lothar=20Wa=C3=9Fmann?= , netdev@vger.kernel.org, Frank Li , Fugang Duan , Russell King Subject: [PATCH 7/8] net: fec: simplify loop counter handling in swap_buffer() Date: Mon, 17 Nov 2014 10:51:23 +0100 Message-Id: <1416217884-20911-8-git-send-email-LW@KARO-electronics.de> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1416217884-20911-1-git-send-email-LW@KARO-electronics.de> References: <1416217884-20911-1-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 f73fee7..dbccdf3 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -292,7 +292,7 @@ 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;