From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1753282AbcBAGte (ORCPT <rfc822;w@1wt.eu>);
	Mon, 1 Feb 2016 01:49:34 -0500
Received: from mail.bmw-carit.de ([62.245.222.98]:43212 "EHLO
	mail.bmw-carit.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1752823AbcBAGtc (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Mon, 1 Feb 2016 01:49:32 -0500
X-CTCH-RefID: str=0001.0A0C0203.56AEFFF1.0241,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0
Subject: Re: [PATCH tip v6 2/5] kbuild: Add option to turn incompatible
 pointer check into error
To: Paul Gortmaker <paul.gortmaker@windriver.com>
References: <1453992270-4688-1-git-send-email-daniel.wagner@bmw-carit.de>
 <1453992270-4688-3-git-send-email-daniel.wagner@bmw-carit.de>
 <56AB5867.6020405@bmw-carit.de> <20160129185523.GZ8889@windriver.com>
CC: <linux-kernel@vger.kernel.org>, <linux-rt-users@vger.kernel.org>,
        <linux-kbuild@vger.kernel.org>, Marcelo Tosatti <mtosatti@redhat.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Steven Rostedt <rostedt@goodmis.org>,
        Boqun Feng <boqun.feng@gmail.com>
From: Daniel Wagner <daniel.wagner@bmw-carit.de>
X-Enigmail-Draft-Status: N1110
Message-ID: <56AEFFF1.1010404@bmw-carit.de>
Date: Mon, 1 Feb 2016 07:49:21 +0100
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101
 Thunderbird/38.5.0
MIME-Version: 1.0
In-Reply-To: <20160129185523.GZ8889@windriver.com>
Content-Type: text/plain; charset="windows-1252"
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On 01/29/2016 07:55 PM, Paul Gortmaker wrote:
> [Re: [PATCH tip v6 2/5] kbuild: Add option to turn incompatible pointer check into error] On 29/01/2016 (Fri 13:17) Daniel Wagner wrote:
> 
>> On 01/28/2016 03:44 PM, Daniel Wagner wrote:
>>> +# enforce correct pointer usage
>>> +KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
>>> +
>>
>> As it turns out there are a few fallouts by that one. I'll send fixes
>> for it.
> 
> Did you try non-x86 builds with this applied?   I'd be really surprised
> if there were just a few, once you did allyesconfig/allmodconfig for
> ARM, MIPS, PPC, etc.

I have tried this with non-x86 builds and apart of a few problems all
looked fine. As it turns out I was using too old cross tools from
kernel.org [1]. Luckily Fengguang's kbuild robot did catch a bunch of
them (see the patches in this series).

Since Thomas was also surprised that only a bunch of them showed up,
I'll better give it another go with more recent compilers.

cheers,
daniel

[1] https://www.kernel.org/pub/tools/crosstool