From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-20.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4D4BC4332F for ; Wed, 22 Sep 2021 10:56:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9662161242 for ; Wed, 22 Sep 2021 10:56:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235246AbhIVK6E (ORCPT ); Wed, 22 Sep 2021 06:58:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:57074 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235150AbhIVK6D (ORCPT ); Wed, 22 Sep 2021 06:58:03 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id F012C60EB6; Wed, 22 Sep 2021 10:56:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1632308194; bh=pFht2crJ58fEPAb0efcLhPOBTsC8scTXAQlpfMeAVoo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=axxF4TAPBPC0vV4Mpka2ZRyclJEe15Nja20qCfmS3Jr13KUwQco1sVR3ha8PCYFbf GFtDR34FSha0wSHGnwWGcZJb221QSBr3MXwfGTUuDJmeXzXDUrOq844Bxeps55tUxY mX4tBMGQ3iJKOufvdYbxVkiGdOmZaT3Q3bU88lzOslh5bCaLKijkmA+bN4sVRAGwnk rGEk3GJ+o5u/lvA4JHuUDxu66z7Wd51GDBZsZFsgPzUdH5BCcRxgFo5Sktq4kJqxIi oqWzWEXqINKttAJUut/XM9a8GXXSm1JgOeoA3M1IxyqamrXNVddHnaN7y7lnaGk9IJ 1neIBcG7XxCHw== Received: by pali.im (Postfix) id 254A4AC1; Wed, 22 Sep 2021 12:56:32 +0200 (CEST) From: =?UTF-8?q?Pali=20Roh=C3=A1r?= To: Michael Turquette , Stephen Boyd , Rob Herring , Greg Kroah-Hartman Cc: Andrew Lunn , Gregory Clement , Sebastian Hesselbarth , Vladimir Vid , =?UTF-8?q?Marek=20Beh=C3=BAn?= , linux-clk@vger.kernel.org, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [RESEND PATCH v5 1/6] math64: New DIV_U64_ROUND_CLOSEST helper Date: Wed, 22 Sep 2021 12:54:28 +0200 Message-Id: <20210922105433.11744-2-pali@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210922105433.11744-1-pali@kernel.org> References: <20210922105433.11744-1-pali@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org Provide DIV_U64_ROUND_CLOSEST helper which uses div_u64 to perform division rounded to the closest integer using unsigned 64bit dividend and unsigned 32bit divisor. Signed-off-by: Pali Rohár --- include/linux/math64.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/linux/math64.h b/include/linux/math64.h index 2928f03d6d46..a14f40de1dca 100644 --- a/include/linux/math64.h +++ b/include/linux/math64.h @@ -300,6 +300,19 @@ u64 mul_u64_u64_div_u64(u64 a, u64 mul, u64 div); #define DIV64_U64_ROUND_CLOSEST(dividend, divisor) \ ({ u64 _tmp = (divisor); div64_u64((dividend) + _tmp / 2, _tmp); }) +/* + * DIV_U64_ROUND_CLOSEST - unsigned 64bit divide with 32bit divisor rounded to nearest integer + * @dividend: unsigned 64bit dividend + * @divisor: unsigned 32bit divisor + * + * Divide unsigned 64bit dividend by unsigned 32bit divisor + * and round to closest integer. + * + * Return: dividend / divisor rounded to nearest integer + */ +#define DIV_U64_ROUND_CLOSEST(dividend, divisor) \ + ({ u32 _tmp = (divisor); div_u64((u64)(dividend) + _tmp / 2, _tmp); }) + /* * DIV_S64_ROUND_CLOSEST - signed 64bit divide with 32bit divisor rounded to nearest integer * @dividend: signed 64bit dividend -- 2.20.1