From patchwork Fri May 31 15:09:06 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lee Jones X-Patchwork-Id: 2644501 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) by patchwork2.kernel.org (Postfix) with ESMTP id 4BB30DFB79 for ; Fri, 31 May 2013 15:09:48 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UiQxY-00046R-So; Fri, 31 May 2013 15:09:41 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UiQxW-0004K0-24; Fri, 31 May 2013 15:09:38 +0000 Received: from mail-wg0-x236.google.com ([2a00:1450:400c:c00::236]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UiQxT-0004J8-N3 for linux-arm-kernel@lists.infradead.org; Fri, 31 May 2013 15:09:36 +0000 Received: by mail-wg0-f54.google.com with SMTP id j13so1311129wgh.33 for ; Fri, 31 May 2013 08:09:12 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:x-gm-message-state; bh=K3fiDDbE05nHiuGKg9pyXeL5Akab7I60jDaQLL+HTHo=; b=WgyT0zUsZHajj9BWGuiTPWB/CYiF1OhPP8htVBp+wmmqTDtOFh6NJEgYy4CWzCYk4D +nKXAlamJv7CMGf2SDBtdr4OoHyssPL2Y64chY9EHiUqigEabpt8RqwciY7SdfsbafOj F3WPIIFKGIv26at1/TZXE8nWaTaLyb66VNG/WpzJQO1tb0X/o9SfzCcAe8s7QXAFOCEu zjPqACfKzYdIFjpy2g/BDiY/9wqdfktFdKApZj1MwQ5awETkEhRq+WfNhlT8c0lefBJM R1IAaK7WWnbnqsJIOjmnliRHwg4y+7mTH8mzYVuqlT9yY9JpKOcVEhYwzvV7JTOP1CdS 7fDg== X-Received: by 10.194.63.140 with SMTP id g12mr9962439wjs.13.1370012952229; Fri, 31 May 2013 08:09:12 -0700 (PDT) Received: from localhost.localdomain (cpc34-aztw25-2-0-cust250.18-1.cable.virginmedia.com. [86.16.136.251]) by mx.google.com with ESMTPSA id dj7sm4567296wib.6.2013.05.31.08.09.10 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 31 May 2013 08:09:11 -0700 (PDT) From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] ARM: ux500: Enable HIGHMEM in the u8540 defconfig Date: Fri, 31 May 2013 16:09:06 +0100 Message-Id: <1370012946-7374-1-git-send-email-lee.jones@linaro.org> X-Mailer: git-send-email 1.7.10.4 X-Gm-Message-State: ALoCoQmSQ20+ClpZq9aHuq0cQ6FZbEDe4SGjGigYjG388N9Uw9/tqEsV3ulurevEX72wkSKzWkmL X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130531_110935_917317_8FA91BF4 X-CRM114-Status: GOOD ( 10.31 ) X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Lee Jones , linus.walleij@stericsson.com, arnd@arndb.de, srinidhi.kasagar@stericsson.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org In order to utilise all of the memory located on ux500 based devices we have to enable HIGHMEM. Without it the kernel truncates memory down to what's left after the PAGE_OFFSET has been applied, which doesn't leave an awful lot, especially if we're running large rootfs' such as full Linux desktop distributions or Android. Signed-off-by: Lee Jones --- arch/arm/configs/u8500_defconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/configs/u8500_defconfig b/arch/arm/configs/u8500_defconfig index 2d322d2..38d633a 100644 --- a/arch/arm/configs/u8500_defconfig +++ b/arch/arm/configs/u8500_defconfig @@ -1,3 +1,4 @@ +CONFIG_HIGHMEM=y # CONFIG_SWAP is not set CONFIG_SYSVIPC=y CONFIG_NO_HZ=y