linux-kernel - Re: [PATCH 4/4] cfq-iosched: Allow parent cgroup to preempt its child

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Date:	Thu, 26 Nov 2015 14:22:40 +0100
From:	Jan Kara <jack@...e.cz>
To:	kbuild test robot <lkp@...el.com>
Cc:	Jan Kara <jack@...e.cz>, kbuild-all@...org, axboe@...nel.dk,
	Jeff Moyer <jmoyer@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, Tejun Heo <tj@...nel.org>,
	Jan Kara <jack@...e.com>
Subject: Re: [PATCH 4/4] cfq-iosched: Allow parent cgroup to preempt its child

On Thu 26-11-15 04:24:23, kbuild test robot wrote:
> Hi Jan,
> 
> [auto build test ERROR on block/for-next]
> [also build test ERROR on v4.4-rc2 next-20151124]
> 
> url:    https://github.com/0day-ci/linux/commits/Jan-Kara/SYNC_NOIDLE-preemption-for-ancestor-cgroups/20151125-222645
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
> config: i386-allmodconfig (attached as .config)
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=i386 
> 
> All errors (new ones prefixed by >>):
> 
> >> ERROR: "cgroup_is_descendant" undefined!

Ah, I didn't notice the function is not exported. Attached patch fixes the
build.

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR

View attachment "0001-cgroup-Export-cgroup_is_descendant.patch" of type "text/x-patch" (761 bytes)