Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754193Ab3HEByj (ORCPT ); Sun, 4 Aug 2013 21:54:39 -0400 Received: from intranet.asianux.com ([58.214.24.6]:55242 "EHLO intranet.asianux.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754086Ab3HEByi (ORCPT ); Sun, 4 Aug 2013 21:54:38 -0400 X-Spam-Score: -100.8 Message-ID: <51FF059E.2030101@asianux.com> Date: Mon, 05 Aug 2013 09:53:34 +0800 From: Chen Gang User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2 MIME-Version: 1.0 To: Joe Perches CC: Chen Gang F T , "'Jiri Kosina'" , jaharkes@cs.cmu.edu, coda@cs.cmu.edu, codalist@TELEMANN.coda.cs.cmu.edu, "linux-kernel@vger.kernel.org" Subject: Re: [PATCH trivial] include/linux/coda.h: remove useless '#else' References: <51F76B7D.2090602@asianux.com> <1375187380.2075.111.camel@joe-AO722> <51F86C08.3080805@asianux.com> <51F86E1A.60404@asianux.com> <51F8818C.7030703@gmail.com> <51FEF0AC.8040804@asianux.com> <1375665700.3133.19.camel@joe-AO722> In-Reply-To: <1375665700.3133.19.camel@joe-AO722> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2082 Lines: 61 On 08/05/2013 09:21 AM, Joe Perches wrote: > On Mon, 2013-08-05 at 08:24 +0800, Chen Gang wrote: >> On 07/31/2013 11:16 AM, Chen Gang F T wrote: >>> On 07/31/2013 09:53 AM, Chen Gang wrote: >>>> On 07/31/2013 09:44 AM, Chen Gang wrote: >>>>> On 07/30/2013 08:29 PM, Joe Perches wrote: >>>>>> On Tue, 2013-07-30 at 15:30 +0800, Chen Gang wrote: >>>>>>> '#else' is useless, need remove. >>>>>>> >>>>>>> Signed-off-by: Chen Gang >>>>>>> --- >>>>>>> include/linux/coda.h | 1 - >>>>>>> 1 files changed, 0 insertions(+), 1 deletions(-) >>>>>>> >>>>>>> diff --git a/include/linux/coda.h b/include/linux/coda.h >>>>>>> index cff544f..d30209b 100644 >>>>>>> --- a/include/linux/cod >>>>>>> +++ b/include/linux/coda.h >>>>>>> @@ -60,7 +60,6 @@ Mellon the rights to redistribute these changes without encumbrance. >>>>>>> >>>>>>> #if defined(__linux__) >>>>>>> typedef unsigned long long u_quad_t; >>>>>>> -#else >>>>>>> #endif >>>>>>> #include >>>>>>> #endif >>>>>> >>>>>> Why have the #if at all? >>>>>> >> >> Hmm... if any members have some questions about the fix, commonly it >> means the related fix need additional improvement. >> >> Is it better to use BUILD_BUG() for the fix ? > > Probably not. __linux__ is predefined by gcc. > > Using an #ifdef __linux__ might make some sense in > in include/uapi, but not in include/linux. > > Hmm... since "linux/coda.h" will include "uapi/linux/coda.h", it is necessary to check __linux__ whether defined. For some old compilers which is still widely used, they really do not define __linux__, when use these compilers, we need give a necessary check, if can not pass, need report BUILD_BUG(). e.g. for some versions of openrisc, please ref: https://lkml.org/lkml/2013/7/30/888. (it is in applying work flow). Thanks. -- Chen Gang -- 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/