From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Date: Mon, 23 Feb 2015 18:40:25 +0000 Subject: Re: fs: dax: do not build on ARC or SH Message-Id: <20150223184025.GD2780@wil.cx> List-Id: References: <5778538.KJ98x3yxkB@wuerfel> In-Reply-To: <5778538.KJ98x3yxkB@wuerfel> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Arnd Bergmann Cc: Matthew Wilcox , Geert Uytterhoeven , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Andrew Morton , linux-sh@vger.kernel.org, Vineet Gupta On Mon, Feb 23, 2015 at 12:29:45PM +0100, Arnd Bergmann wrote: > The DAX implementation relies on the architecture to provide a working > copy_user_page() function, as reported by Michael Ellerman's kisskb > build bot: > > fs/dax.c: error: implicit declaration of function 'copy_user_page' [-Werror=implicit-function-declaration]: => 266:2 > > We already have a list of architectures that are known to be incompatible, > but the list is missing ARC and SH at the moment. Further, blackfin and > c6x also lack support for this function, but are already excluded because > they do not support MMU-based kernels. I've got a short list of patches for DAX; I'll add this one to the list. Have the maintainers of these architectures been notified that they're missing a core piece of kernel functionality? From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753093AbbBWSkg (ORCPT ); Mon, 23 Feb 2015 13:40:36 -0500 Received: from mga03.intel.com ([134.134.136.65]:53582 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753014AbbBWSk2 (ORCPT ); Mon, 23 Feb 2015 13:40:28 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,632,1418112000"; d="scan'208";a="458473413" Date: Mon, 23 Feb 2015 13:40:25 -0500 From: Matthew Wilcox To: Arnd Bergmann Cc: Matthew Wilcox , Geert Uytterhoeven , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Andrew Morton , linux-sh@vger.kernel.org, Vineet Gupta Subject: Re: fs: dax: do not build on ARC or SH Message-ID: <20150223184025.GD2780@wil.cx> References: <5778538.KJ98x3yxkB@wuerfel> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5778538.KJ98x3yxkB@wuerfel> 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 Mon, Feb 23, 2015 at 12:29:45PM +0100, Arnd Bergmann wrote: > The DAX implementation relies on the architecture to provide a working > copy_user_page() function, as reported by Michael Ellerman's kisskb > build bot: > > fs/dax.c: error: implicit declaration of function 'copy_user_page' [-Werror=implicit-function-declaration]: => 266:2 > > We already have a list of architectures that are known to be incompatible, > but the list is missing ARC and SH at the moment. Further, blackfin and > c6x also lack support for this function, but are already excluded because > they do not support MMU-based kernels. I've got a short list of patches for DAX; I'll add this one to the list. Have the maintainers of these architectures been notified that they're missing a core piece of kernel functionality?