From patchwork Wed May 6 15:14:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 11531349 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7415414C0 for ; Wed, 6 May 2020 15:14:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 521902080D for ; Wed, 6 May 2020 15:14:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="nMov142W" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729327AbgEFPOz (ORCPT ); Wed, 6 May 2020 11:14:55 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:37068 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729290AbgEFPOz (ORCPT ); Wed, 6 May 2020 11:14:55 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 046FEgMb005116; Wed, 6 May 2020 10:14:42 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1588778082; bh=ANKUGmxjcIwlV3rIaZN/J5tOLrnX04VnB9EtUZpb2tU=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=nMov142WRcXu5mobYWDrEDh68bXqU6z1qExS+1/glqx3tY16Z+SMTRXAdUkmWHcij /cy4K6fublaZwh9IGnTLJs5tK8F8eDyV3cEe5uc1rJPxBoDXkh2B7zMWqWa1sG8i0U TG1vmi7X2jAgRp21iwH2kp3C+0RDDVzNusSHx+ZM= Received: from DFLE102.ent.ti.com (dfle102.ent.ti.com [10.64.6.23]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTP id 046FEgPQ015335; Wed, 6 May 2020 10:14:42 -0500 Received: from DFLE107.ent.ti.com (10.64.6.28) by DFLE102.ent.ti.com (10.64.6.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Wed, 6 May 2020 10:14:42 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DFLE107.ent.ti.com (10.64.6.28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Wed, 6 May 2020 10:14:42 -0500 Received: from a0393678ub.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 046FEUg8119457; Wed, 6 May 2020 10:14:38 -0500 From: Kishon Vijay Abraham I To: Bjorn Helgaas , Rob Herring , Lorenzo Pieralisi , Arnd Bergmann , Tom Joseph CC: Greg Kroah-Hartman , , , , , , Subject: [PATCH v4 02/14] linux/kernel.h: Add PTR_ALIGN_DOWN macro Date: Wed, 6 May 2020 20:44:17 +0530 Message-ID: <20200506151429.12255-3-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200506151429.12255-1-kishon@ti.com> References: <20200506151429.12255-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Add a macro for aligning down a pointer. This is useful to get an aligned register address when a device allows only word access and doesn't allow half word or byte access. Signed-off-by: Kishon Vijay Abraham I Acked-by: Rob Herring --- include/linux/kernel.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 9b7a8d74a9d6..c3b361b5be54 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -34,6 +34,7 @@ #define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a)) #define __ALIGN_MASK(x, mask) __ALIGN_KERNEL_MASK((x), (mask)) #define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a))) +#define PTR_ALIGN_DOWN(p, a) ((typeof(p))ALIGN_DOWN((unsigned long)(p), (a))) #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) /* generic data direction definitions */