Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753482Ab3IJQve (ORCPT ); Tue, 10 Sep 2013 12:51:34 -0400 Received: from mail-pb0-f52.google.com ([209.85.160.52]:35775 "EHLO mail-pb0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753013Ab3IJQvd (ORCPT ); Tue, 10 Sep 2013 12:51:33 -0400 MIME-Version: 1.0 In-Reply-To: <20130910164404.GA1690@roeck-us.net> References: <1378688580-11935-1-git-send-email-linux@roeck-us.net> <20130909015945.GA4029@kroah.com> <20130909134012.GA24738@infradead.org> <20130909163902.GA28685@kroah.com> <20130909170819.GA22764@roeck-us.net> <20130909172232.GA10029@kroah.com> <20130909200610.GA28416@roeck-us.net> <20130910164404.GA1690@roeck-us.net> Date: Tue, 10 Sep 2013 18:51:32 +0200 X-Google-Sender-Auth: AHtg6Nk3TGpNtsIzCUYGJeOnWZs Message-ID: Subject: Re: [PATCH] staging: Disable lustre file system for MIPS, SH, and XTENSA From: Geert Uytterhoeven To: Guenter Roeck Cc: Greg Kroah-Hartman , "David S. Miller" , Christoph Hellwig , "linux-kernel@vger.kernel.org" , driverdevel , Peng Tao , Peng Tao Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1147 Lines: 29 On Tue, Sep 10, 2013 at 6:44 PM, Guenter Roeck wrote: >> I tried with 2.6.3 from crosstool, and it succeeded, too. >> > Do such old versions of gcc still exist ? Just kidding :) > >> Turns out cfs_access_process_vm() is called with write=0 only. >> Gcc 2.6.3 optimizes away the write != 0 branch (which calls copy_to_user_page() >> and thus flush_icache_user_range()), while gcc 4.1.2 doesn't do that. >> Mystery solved. >> > Still bad. Guess it would still fail with 4.6.3 if optimization is turned off. For the record: s/2.6.3/4.6.3/. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/