From patchwork Wed Sep 16 06:14:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11779085 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 1AFD0112E for ; Wed, 16 Sep 2020 06:27:27 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D1F4720684 for ; Wed, 16 Sep 2020 06:27:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="sHDU3taF"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="WxTCKh5R" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D1F4720684 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ZIOmUyym3bRBdfEW9wUIZIiCM7Z+DQZ6OJcvtlXqy4c=; b=sHDU3taF4jJjbolZcvpWbIAD1 +rmzh3Zf0XJzc1t8fXLvbhT7ykCefzVczCSDkobp/2WcwsB2JAGSGcEqqIAneXMmbE9QwoBYRu0g9 YPXISXAD9s7o50BqH6pzjQerVAktbY+sNlk+i8j52zBpCVKpDYQfVQzPliHDgE1O8Dobhiaruvl5k LM/aZmOyI//NGDa6SHUrGWsE5kHbH/94L/cVzEUAwlPoYbHeqIZjp110XFkAppiIFuU5s/lunNgqm BbX2hg+IL6z0qfFQ0rPfRjFxcF+h1QCgjd8Nd++BbOVxo01BiBgRaQ6+04lcXG6t//d8R8n/DN2jM gFuLzendw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kIQtD-00083i-7f; Wed, 16 Sep 2020 06:25:59 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kIQtB-000838-3v for linux-arm-kernel@merlin.infradead.org; Wed, 16 Sep 2020 06:25:57 +0000 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=WxTCKh5RipO/ghifOttWKDY07y QNmTljydnuaqDLQ3kR/uRVM5HpNnUWS5FbFx0Kp8Kt9rimc4W3gIvIa8DayD7I9+mtCAnKGz6/w3T e4i815xpazXxeeB9uo+qUbZ4axz35wmCVGx1ifmhNI1laNYSGVkapVzYPnsdbtHPRl9bO/Kj4FCKW 1n5cWUKmNXdn9m1c9qSWX8Hix1q1NrzHTfqcV1dEWx+36tFDJC4xG4kuvntDGtb/gw0n+TXkaU94v D5hbJNS63JnwIXTHAGWlf54tzj7lxAqMGvsT3qhQaY8wkKhfgBfcwnMHumJeJ6PsCwvzpl2lqQTI2 lphIJfIw==; 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 1kIQt9-0007Y3-K4; Wed, 16 Sep 2020 06:25:55 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org, Russell King , Santosh Shilimkar , Greg Kroah-Hartman Subject: [PATCH 4/6] ARM/keystone: move the DMA offset handling under ifdef CONFIG_ARM_LPAE Date: Wed, 16 Sep 2020 08:14:57 +0200 Message-Id: <20200916061500.1970090-5-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200916061500.1970090-1-hch@lst.de> References: <20200916061500.1970090-1-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 X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ohad Ben-Cohen , devicetree@vger.kernel.org, Florian Fainelli , linux-sh@vger.kernel.org, Frank Rowand , linux-usb@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, Bjorn Andersson , linux-acpi@vger.kernel.org, Rob Herring , Jim Quinlan , linux-pci@vger.kernel.org, Nathan Chancellor , Robin Murphy , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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(); }