From patchwork Tue Jun 4 13:14:51 2019 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: 10974999 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1E63592A for ; Tue, 4 Jun 2019 13:17:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0D6DE20500 for ; Tue, 4 Jun 2019 13:17:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0185C26E54; Tue, 4 Jun 2019 13:17:35 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9E63E20500 for ; Tue, 4 Jun 2019 13:17:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727530AbfFDNRc (ORCPT ); Tue, 4 Jun 2019 09:17:32 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:54854 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727480AbfFDNRb (ORCPT ); Tue, 4 Jun 2019 09:17:31 -0400 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id x54DHD1u027960; Tue, 4 Jun 2019 08:17:13 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1559654233; bh=gskYCXt69auxdl0gJm5PmVmDCrGNb92GxmcQN4v//vI=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=FZrwJCy0oF0940yJ1Ges+n6/f/6gfkwi/N2rjMaSwcFAhzwrUyrlOK/UTy3CHL+b4 FfHYPO+7aXQbd9He0w5ngaEoaMUIH8tBK354E0FwyLdaZ3IDNCJllHtlFmT+4JIFrf SaqAqv6a8M87X221Mal/XQziW2sjRBOIqRkwxTXs= Received: from DFLE103.ent.ti.com (dfle103.ent.ti.com [10.64.6.24]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x54DHDRb042475 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 4 Jun 2019 08:17:13 -0500 Received: from DFLE100.ent.ti.com (10.64.6.21) by DFLE103.ent.ti.com (10.64.6.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Tue, 4 Jun 2019 08:17:12 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE100.ent.ti.com (10.64.6.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Tue, 4 Jun 2019 08:17:12 -0500 Received: from a0393678ub.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id x54DGdGL098972; Tue, 4 Jun 2019 08:17:07 -0500 From: Kishon Vijay Abraham I To: Tom Joseph , Bjorn Helgaas , Rob Herring , Mark Rutland , Lorenzo Pieralisi , Arnd Bergmann , Gustavo Pimentel CC: Greg Kroah-Hartman , Frank Rowand , Jingoo Han , , , , , , , Kishon Vijay Abraham I Subject: [RFC PATCH 05/30] linux/kernel.h: Add PTR_ALIGN_DOWN macro Date: Tue, 4 Jun 2019 18:44:51 +0530 Message-ID: <20190604131516.13596-6-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190604131516.13596-1-kishon@ti.com> References: <20190604131516.13596-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 --- include/linux/kernel.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 74b1ee9027f5..f5be987f1f95 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 */