From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753968AbdBUSyr (ORCPT ); Tue, 21 Feb 2017 13:54:47 -0500 Received: from mail-pg0-f68.google.com ([74.125.83.68]:34931 "EHLO mail-pg0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752295AbdBUSyZ (ORCPT ); Tue, 21 Feb 2017 13:54:25 -0500 Date: Wed, 22 Feb 2017 00:26:15 +0530 From: simran singhal To: gregkh@linuxfoundation.org Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, outreachy-kernel@googlegroups.com Subject: [PATCH 2/7] staging: most: Using macro DIV_ROUND_UP Message-ID: <20170221185615.GA25627@singhal-Inspiron-5558> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) /(d)). It clarifies the divisor calculations. This occurence was detected using the coccinelle script: @@ expression e1; expression e2; @@ ( - ((e1) + e2 - 1) / (e2) + DIV_ROUND_UP(e1,e2) | - ((e1) + (e2 - 1)) / (e2) + DIV_ROUND_UP(e1,e2) ) Signed-off-by: simran singhal --- drivers/staging/most/hdm-dim2/dim2_hal.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/staging/most/hdm-dim2/dim2_hal.c b/drivers/staging/most/hdm-dim2/dim2_hal.c index 0b9816c..6824826 100644 --- a/drivers/staging/most/hdm-dim2/dim2_hal.c +++ b/drivers/staging/most/hdm-dim2/dim2_hal.c @@ -49,7 +49,7 @@ #define DBR_SIZE (16 * 1024) /* specified by IP */ #define DBR_BLOCK_SIZE (DBR_SIZE / 32 / DBR_MAP_SIZE) -#define ROUND_UP_TO(x, d) (((x) + (d) - 1) / (d) * (d)) +#define ROUND_UP_TO(x, d) (DIV_ROUND_UP(x, (d)) * (d)) /* -------------------------------------------------------------------------- */ /* generic helper functions and macros */ @@ -117,7 +117,7 @@ static int alloc_dbr(u16 size) return DBR_SIZE; /* out of memory */ for (i = 0; i < DBR_MAP_SIZE; i++) { - u32 const blocks = (size + DBR_BLOCK_SIZE - 1) / DBR_BLOCK_SIZE; + u32 const blocks = DIV_ROUND_UP(size, DBR_BLOCK_SIZE); u32 mask = ~((~(u32)0) << blocks); do { @@ -137,7 +137,7 @@ static int alloc_dbr(u16 size) static void free_dbr(int offs, int size) { int block_idx = offs / DBR_BLOCK_SIZE; - u32 const blocks = (size + DBR_BLOCK_SIZE - 1) / DBR_BLOCK_SIZE; + u32 const blocks = DIV_ROUND_UP(size, DBR_BLOCK_SIZE); u32 mask = ~((~(u32)0) << blocks); mask <<= block_idx % 32; -- 2.7.4