Hi Tony,

I love your patch! Yet something to improve:

[auto build test ERROR on s390/features]
[also build test ERROR on v4.17-rc1 next-20180413]
[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/Tony-Krowiak/s390-vfio-ap-guest-dedicated-crypto-adapters/20180416-052759
base:   https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git features
config: s390-alldefconfig (attached as .config)
compiler: s390x-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=s390 

All errors (new ones prefixed by >>):

   arch/s390/kvm/kvm-ap.o: In function `kvm_ap_matrix_create':
>> kvm-ap.c:(.text+0x176): undefined reference to `ap_query_configuration'

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