From patchwork Mon Sep 14 07:33:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 297649 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=-12.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 8DFE2C433E2 for ; Mon, 14 Sep 2020 07:44:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 24512207C3 for ; Mon, 14 Sep 2020 07:44:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="t4keXE5T" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726099AbgINHos (ORCPT ); Mon, 14 Sep 2020 03:44:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59830 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725968AbgINHop (ORCPT ); Mon, 14 Sep 2020 03:44:45 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8974CC06174A; Mon, 14 Sep 2020 00:44:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=rZz7WEucbLzmcSBpKZVSsyybm+o08I+OYE053DvRjjM=; b=t4keXE5TDnxAHF6g8hogs4VgZL ULo2k/B8+ruC5jsQr27s/sQblW82iX+G9AIpOhhy6JQY5XjSgIU2JThFVtAqqJOprPd9Y1mcTxzFJ 7xexc8gEJwRKQ68VQSDLyUs1lCl/V0ZwaUXP7JJpJhCHRS7vhIr1gvV2PwcjkInHgO6yQUAvm/Qi0 L9HoU2awqpjY9vMbIUOhixXqveqkDZy0oProfsCjI+Yzty2QtJxZmUDWg4i0FDGXer1pmo6yH1+6/ sda/7CKX4v4tUq/CEuOgohNyWCKUA6LPDJuza3QFbgZSg55jsHqgvpUvIsbRnDSKiqAu4+j++J2ey YPPprpGA==; Received: from 089144214092.atnat0023.highway.a1.net ([89.144.214.92] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kHjAE-0000Rh-Gw; Mon, 14 Sep 2020 07:44:38 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org, Russell King , Santosh Shilimkar , Greg Kroah-Hartman Cc: Jim Quinlan , Nathan Chancellor , Florian Fainelli , Robin Murphy , Rob Herring , Frank Rowand , Ohad Ben-Cohen , Bjorn Andersson , linux-remoteproc@vger.kernel.org, linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-sh@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH 4/6] ARM/keystone: move the DMA offset handling under ifdef CONFIG_ARM_LPAE Date: Mon, 14 Sep 2020 09:33:41 +0200 Message-Id: <20200914073343.1579578-5-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200914073343.1579578-1-hch@lst.de> References: <20200914073343.1579578-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The DMA offset notifier can only be used if PHYS_OFFSET is at least KEYSTONE_HIGH_PHYS_START, which can't be represented by a 32-bit phys_addr_t. Currently the code compiles fine despite that, a pending change to the DMA offset handling would create a compiler warning for this case. Add an ifdef to not compile the code except for LPAE configs. Signed-off-by: Christoph Hellwig Reviewed-by: Robin Murphy --- arch/arm/mach-keystone/keystone.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm/mach-keystone/keystone.c b/arch/arm/mach-keystone/keystone.c index 638808c4e12247..dcd031ba84c2e0 100644 --- a/arch/arm/mach-keystone/keystone.c +++ b/arch/arm/mach-keystone/keystone.c @@ -24,6 +24,7 @@ #include "keystone.h" +#ifdef CONFIG_ARM_LPAE static unsigned long keystone_dma_pfn_offset __read_mostly; static int keystone_platform_notifier(struct notifier_block *nb, @@ -48,14 +49,17 @@ static int keystone_platform_notifier(struct notifier_block *nb, static struct notifier_block platform_nb = { .notifier_call = keystone_platform_notifier, }; +#endif /* CONFIG_ARM_LPAE */ static void __init keystone_init(void) { +#ifdef CONFIG_ARM_LPAE if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START) { keystone_dma_pfn_offset = PFN_DOWN(KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START); bus_register_notifier(&platform_bus_type, &platform_nb); } +#endif keystone_pm_runtime_init(); }