Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754734AbYKKBBp (ORCPT ); Mon, 10 Nov 2008 20:01:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752817AbYKKBBg (ORCPT ); Mon, 10 Nov 2008 20:01:36 -0500 Received: from e8.ny.us.ibm.com ([32.97.182.138]:33760 "EHLO e8.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752650AbYKKBBg (ORCPT ); Mon, 10 Nov 2008 20:01:36 -0500 From: "Darrick J. Wong" Subject: [PATCH 1/2] Create a DIV_ROUND_CLOSEST macro to do division with rounding To: "Darrick J. Wong" , Jean Delvare Cc: Andrew Morton , linux-kernel , lm-sensors Date: Mon, 10 Nov 2008 17:01:32 -0800 Message-ID: <20081111010132.1730.76566.stgit@elm3a70.beaverton.ibm.com> User-Agent: StGIT/0.13 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1311 Lines: 35 Create a helper macro to divide two numbers and round the result to the nearest whole number. This is a helper macro for hwmon drivers that want to convert incoming sysfs values per standard hwmon practice, though the macro itself can be used by anyone. Signed-off-by: Darrick J. Wong --- include/linux/kernel.h | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/include/linux/kernel.h b/include/linux/kernel.h index fba141d..fb02266 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -48,6 +48,12 @@ extern const char linux_proc_banner[]; #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f)) #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) #define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y)) +#define DIV_ROUND_CLOSEST(x, divisor)( \ +{ \ + typeof(divisor) __divisor = divisor; \ + (((x) + ((__divisor) / 2)) / (__divisor)); \ +} \ +) #define _RET_IP_ (unsigned long)__builtin_return_address(0) #define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; }) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/