From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752741AbbIKLAn (ORCPT ); Fri, 11 Sep 2015 07:00:43 -0400 Received: from foss.arm.com ([217.140.101.70]:37442 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751696AbbIKLAm (ORCPT ); Fri, 11 Sep 2015 07:00:42 -0400 Date: Fri, 11 Sep 2015 12:00:37 +0100 From: Catalin Marinas To: Jisheng Zhang Cc: will.deacon@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH] arm64: dma-mapping: check whether cma area is initialized or not Message-ID: <20150911110036.GC5771@e104818-lin.cambridge.arm.com> References: <1441957787-5526-1-git-send-email-jszhang@marvell.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1441957787-5526-1-git-send-email-jszhang@marvell.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Sep 11, 2015 at 03:49:47PM +0800, Jisheng Zhang wrote: > If CMA is turned on and CMA size is set to zero, kernel should > behave as if CMA was not enabled at compile time. > Every dma allocation should check existence of cma area > before requesting memory. > > Arm has done this by commit e464ef16c4f0 ("arm: dma-mapping: add > checking cma area initialized"), also do this for arm64. > > Signed-off-by: Jisheng Zhang Acked-by: Catalin Marinas Will should pick this up for 4.3. Thanks. -- Catalin