linux-kernel - Re: linux-next: build failure after merge of the akpm-current tree

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Message-ID: <20150921075859.GB4995@esperanza>
Date:	Mon, 21 Sep 2015 10:58:59 +0300
From:	Vladimir Davydov <vdavydov@...allels.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>, <linux-next@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the akpm-current tree

On Mon, Sep 21, 2015 at 02:10:39PM +1000, Stephen Rothwell wrote:
> After merging the akpm-current tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
> 
> mm/vmscan.c: In function 'sane_reclaim':
> mm/vmscan.c:178:2: error: implicit declaration of function 'cgroup_on_dfl' [-Werror=implicit-function-declaration]
>   if (cgroup_on_dfl(memcg->css.cgroup))
>   ^
> 
> Caused by commit
> 
>   d08255ab4d66 ("vmscan: fix sane_reclaim helper for legacy memcg")
> 
> interacting with commit
> 
>   9e10a130d9b6 ("cgroup: replace cgroup_on_dfl() tests in controllers with cgroup_subsys_on_dfl()")
> 
> from the cgroup tree.
> 
> I don't know what the correct firx is here (help, please) so I have just
> open coded the cgroup_on_dfl() call for now:

Quoting Tejun (http://www.spinics.net/lists/linux-mm/msg94556.html):

: Just a heads-up.  I'm applying a patch which replaces cgroup_on_dfl()
: with cgroup_subsys_on_dfl() to cgroup/for-4.4, so this patch would
: need to be adjusted to do cgroup_subsys_on_dfl(memory_cgrp_subsys)
: instead.

Thanks,
Vladimir
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