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

[kbuild test robot]

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!

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0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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