From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Thu, 05 Jun 2008 22:51:57 +0100 (BST) Received: from relay01.mx.bawue.net ([193.7.176.67]:30389 "HELO relay01.mx.bawue.net") by ftp.linux-mips.org with SMTP id S28575467AbYFEVvz (ORCPT ); Thu, 5 Jun 2008 22:51:55 +0100 Received: from lagash (88-106-136-149.dynamic.dsl.as9105.com [88.106.136.149]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by relay01.mx.bawue.net (Postfix) with ESMTP id 5603448916; Thu, 5 Jun 2008 23:51:54 +0200 (CEST) Received: from ths by lagash with local (Exim 4.69) (envelope-from ) id 1K4NNA-0001ea-8L; Thu, 05 Jun 2008 22:51:52 +0100 Date: Thu, 5 Jun 2008 22:51:52 +0100 From: Thiemo Seufer To: Vorobiev Dmitri Cc: Theodore Tso , Martin Michlmayr , Ralf Baechle , Dmitri Vorobiev , linux-mips@linux-mips.org, linux-ext4@vger.kernel.org Subject: Re: ext4dev build failure on mips: "empty_zero_page" undefined Message-ID: <20080605215152.GB15504@networkno.de> References: <20080512130604.GA15008@deprecation.cyrius.com> <90edad820805120654n50f7a00cm3c7b4a4f9346d5ea@mail.gmail.com> <20080512143426.GB7029@mit.edu> <90edad820805120746l61e67362vbd177d63e8b05dc8@mail.gmail.com> <20080513045028.GC22226@linux-mips.org> <20080528070637.GA10393@deprecation.cyrius.com> <20080605111148.GA4483@deprecation.cyrius.com> <1212664977.4840.6.camel@sd048.hel.movial.fi> <20080605183854.GN25477@mit.edu> <38408.84.249.59.97.1212701650.squirrel@webmail.movial.fi> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <38408.84.249.59.97.1212701650.squirrel@webmail.movial.fi> User-Agent: Mutt/1.5.18 (2008-05-17) Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 19416 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: ths@networkno.de Precedence: bulk X-list: linux-mips Vorobiev Dmitri wrote: > Theodore Tso wrote: > > > > If you really insist I suppose we could have a MIPS specific patch > > where we allocate a 4k page and zero it, so we can use it from our > > kernel code because you don't want to export and make available the > > ZERO_PAGE that gets used by the rest of the kernel, but that seems > > awfully silly, and would be a waste of 4k of memory..... Someone from > > MIPS land would have to test it, as well, as I dont think any of the > > ext4 developers have access to a MIPS platform. > > Ted, Ralf seems to be unwilling to accept the ZERO_PAGE() export. If you > send the MIPS-specific patch, I can do the testing for you as I have a > MIPS Malta board at my disposal. AFAIU the problematic case are systems with R4000/R4400 SC/MC CPUs since they use 8 zero pages of different color. Have a look at arch/mips/mm/init.c:setup_zero_pages. Thiemo