From mboxrd@z Thu Jan 1 00:00:00 1970 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=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_MUTT autolearn=ham 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 A9601C282CE for ; Tue, 4 Jun 2019 13:22:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 86E6C2199C for ; Tue, 4 Jun 2019 13:22:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727735AbfFDNWE (ORCPT ); Tue, 4 Jun 2019 09:22:04 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:43696 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727137AbfFDNWE (ORCPT ); Tue, 4 Jun 2019 09:22:04 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D06C8A78; Tue, 4 Jun 2019 06:22:03 -0700 (PDT) Received: from arrakis.emea.arm.com (arrakis.cambridge.arm.com [10.1.196.78]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7A4F03F690; Tue, 4 Jun 2019 06:22:02 -0700 (PDT) Date: Tue, 4 Jun 2019 14:21:59 +0100 From: Catalin Marinas To: Miles Chen Cc: Will Deacon , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, wsd_upstream@mediatek.com, Robin Murphy Subject: Re: [PATCH v2] arm64: mm: make CONFIG_ZONE_DMA32 configurable Message-ID: <20190604132159.GD6610@arrakis.emea.arm.com> References: <1559059700-19078-1-git-send-email-miles.chen@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1559059700-19078-1-git-send-email-miles.chen@mediatek.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 29, 2019 at 12:08:20AM +0800, Miles Chen wrote: > This change makes CONFIG_ZONE_DMA32 defuly y and allows users > to overwrite it only when CONFIG_EXPERT=y. > > For the SoCs that do not need CONFIG_ZONE_DMA32, this is the > first step to manage all available memory by a single > zone(normal zone) to reduce the overhead of multiple zones. > > The change also fixes a build error when CONFIG_NUMA=y and > CONFIG_ZONE_DMA32=n. > > arch/arm64/mm/init.c:195:17: error: use of undeclared identifier 'ZONE_DMA32' > max_zone_pfns[ZONE_DMA32] = PFN_DOWN(max_zone_dma_phys()); > > Change since v1: > 1. only expose CONFIG_ZONE_DMA32 when CONFIG_EXPERT=y > 2. remove redundant IS_ENABLED(CONFIG_ZONE_DMA32) > > Cc: Robin Murphy > Signed-off-by: Miles Chen Queued for 5.3. Thanks. -- Catalin