linux-kernel - Re: mmotm 2014-04-24-13-07 uploaded

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Message-ID: <535A6263.10009@redhat.com>
Date:	Fri, 25 Apr 2014 09:25:55 -0400
From:	Rik van Riel <riel@...hat.com>
To:	paulmck@...ux.vnet.ibm.com, Randy Dunlap <rdunlap@...radead.org>
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Richard Weinberger <richard@....at>, linux-next@...r.kernel.org
Subject: Re: mmotm 2014-04-24-13-07 uploaded

On 04/24/2014 10:49 PM, Paul E. McKenney wrote:
> On Thu, Apr 24, 2014 at 03:40:29PM -0700, Randy Dunlap wrote:
>> On 04/24/14 13:08, akpm@...ux-foundation.org wrote:
>>> The mm-of-the-moment snapshot 2014-04-24-13-07 has been uploaded to
>>>
>>>    http://www.ozlabs.org/~akpm/mmotm/
>>>
>>> mmotm-readme.txt says
>>>
>>> README for mm-of-the-moment:
>>>
>>> http://www.ozlabs.org/~akpm/mmotm/
>>>
>>> This is a snapshot of my -mm patch queue.  Uploaded at random hopefully
>>> more than once a week.
>>>
>>> You will need quilt to apply these patches to the latest Linus release (3.x
>>> or 3.x-rcY).  The series file is in broken-out.tar.gz and is duplicated in
>>> http://ozlabs.org/~akpm/mmotm/series
>>>
>>
>> uml on x86_64 defconfig:
>>
>> drivers/built-in.o: In function `__handle_sysrq':
>> drivers/tty/sysrq.c:514: undefined reference to `rcu_sysrq_start'
>> drivers/tty/sysrq.c:558: undefined reference to `rcu_sysrq_end'
> 
> Hmmm...  Looks like Rik's patch needs declarations in rcupdate.h.
> Not sure how I missed that...  :-/

Looks like maybe sysrq.c should explicitly #include rcupdate.h.

On x86-64 the code compiled just fine, because something else
included rcupdate.h. Apparently on UML this breaks...

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