From patchwork Thu Sep 10 05:40:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11766621 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 B0D2359D for ; Thu, 10 Sep 2020 05:41:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 91812207FB for ; Thu, 10 Sep 2020 05:41:11 +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="kah51+Sh" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726474AbgIJFlF (ORCPT ); Thu, 10 Sep 2020 01:41:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58348 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725855AbgIJFkx (ORCPT ); Thu, 10 Sep 2020 01:40:53 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4389C061756; Wed, 9 Sep 2020 22:40:50 -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=jUBa0iu1eX5jIcAMx7CVSwzh+xe4DajZ3p568CeYFVQ=; b=kah51+ShOTTV+Jr+aRlgd0UmMs NcPtLrFn4E7MudK1Si/fT7/TqxK5SWVfKBVWRLJ8+JXu/KdY+ku4LFycLe+BAZegN1VB+rAFo76U3 S177eVeSuDFVbkgbXgW0Sqyz3T3mkIm7NOn80nM5T/BGthD1RASCpvExnNdOBjrnYuw6+AB/Sa2Q+ ckdaHE+5oXGeq3oExrsn4dz+C7/TGleVTseKtHQJPCdiCPjhMrCwXAfn7da2bLCiIDf0F7/L+sWzn +4HLw8QEwdsFmUsWlbEg59eM7RHmgcuGNXffoy8tU/lFefCjWvyaTfcdBvtznJphl6AMvKHV8R+WY hRZEQN4w==; Received: from [2001:4bb8:184:af1:d8d0:3027:a666:4c4e] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kGFK5-0001tZ-IQ; Thu, 10 Sep 2020 05:40:42 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org, Russell King , Santosh Shilimkar Cc: Jim Quinlan , Nathan Chancellor , Florian Fainelli , Robin Murphy , Rob Herring , Frank Rowand , 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, linux-usb@vger.kernel.org Subject: [PATCH 2/3] ARM/keystone: move the DMA offset handling under ifdef CONFIG_ARM_LPAE Date: Thu, 10 Sep 2020 07:40:37 +0200 Message-Id: <20200910054038.324517-3-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200910054038.324517-1-hch@lst.de> References: <20200910054038.324517-1-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(); }