Hi Jacob,

[auto build test ERROR on tip/sched/core]
[also build test ERROR on v4.9-rc7 next-20161128]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Jacob-Pan/Stop-sched-tick-in-idle-injection-task/20161129-062641
config: i386-randconfig-r0-201648 (attached as .config)
compiler: gcc-5 (Debian 5.4.1-2) 5.4.1 20160904
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   kernel/built-in.o: In function `do_idle':
>> idle.c:(.text+0x3c711): undefined reference to `cpuidle_find_deepest_state'

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