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 S1751037AbaBCIpU (ORCPT <rfc822;w@1wt.eu>);
	Mon, 3 Feb 2014 03:45:20 -0500
Received: from e23smtp07.au.ibm.com ([202.81.31.140]:40529 "EHLO
	e23smtp07.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1750836AbaBCIpR (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Mon, 3 Feb 2014 03:45:17 -0500
Message-ID: <52EF588B.4050904@linux.vnet.ibm.com>
Date: Mon, 03 Feb 2014 14:21:23 +0530
From: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Organization: IBM
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7
MIME-Version: 1.0
To: Waiman Long <waiman.long@hp.com>
CC: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>, Arnd Bergmann <arnd@arndb.de>,
        linux-arch@vger.kernel.org, x86@kernel.org,
        linux-kernel@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Michel Lespinasse <walken@google.com>,
        Andi Kleen <andi@firstfloor.org>, Rik van Riel <riel@redhat.com>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        George Spelvin <linux@horizon.com>,
        Tim Chen <tim.c.chen@linux.intel.com>,
        Daniel J Blueman <daniel@numascale.com>,
        Alexander Fyodorov <halcy@yandex.ru>,
        Aswin Chandramouleeswaran <aswin@hp.com>,
        Scott J Norton <scott.norton@hp.com>,
        Thavatchai Makphaibulchoke <thavatchai.makpahibulchoke@hp.com>
Subject: Re: [PATCH v3 0/2] qspinlock: Introducing a 4-byte queue spinlock
References: <1390933151-1797-1-git-send-email-Waiman.Long@hp.com> <52EA139C.8040106@linux.vnet.ibm.com> <52EA71F8.7070308@hp.com> <52EA9ECA.5040400@linux.vnet.ibm.com>
In-Reply-To: <52EA9ECA.5040400@linux.vnet.ibm.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
X-TM-AS-MML: disable
X-Content-Scanned: Fidelis XPS MAILER
x-cbid: 14020308-0260-0000-0000-0000044DA960
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On 01/31/2014 12:19 AM, Raghavendra K T wrote:
> On 01/30/2014 09:08 PM, Waiman Long wrote:
>> On 01/30/2014 03:55 AM, Raghavendra K T wrote:
>>> On 01/28/2014 11:49 PM, Waiman Long wrote:
> [...]
>                    from kernel/bounds.c:9:
>>> include/linux/log2.h: In function ‘__ilog2_u32’:
>>> include/linux/log2.h:34:2: error: implicit declaration of function
>>> ‘fls’ [-Werror=implicit-function-declaration]
>>> include/linux/log2.h: In function ‘__ilog2_u64’:
>>> include/linux/log2.h:42:2: error: implicit declaration of function
>>> ‘fls64’ [-Werror=implicit-function-declaration]
>>> include/linux/log2.h: In function ‘__roundup_pow_of_two’:
>>> .
>>> .
>>> [trimmed]
>>>
>>
>> The code will need to be compiled in either the latest linux tree as the
>> patches have dependency on some new memory barrier that are in 3.14.
>> Alternatively, you can compile with the latest tip tree.
>>
>> If you have already done that, please send me your config file so that I
>> can reproduce the compilation error in my build environment.
>>
>
> I did compile on latest linux tree which had barrier.txt. May be I 'll
> recheck if I am missing something obvious.
>
> Here is .config attached

An Update:
The reason for failure was that I was compiling for guest. and
CONFIG_PARAVIRT was enabled.