ERROR: "vring_del_virtqueue" [drivers/misc/mic/vop/vop.ko] undefined!

[kbuild test robot]

Hi Sudeep,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4c3b73c6a2eea0cf27fb058086a0eb94e90bffd4
commit: 8810df37762746657cfe84014a8f30758e8f366a misc: mic: Enable VOP debugfs and driver build
date:   8 weeks ago
config: x86_64-randconfig-r0-04032054 (attached as .config)
reproduce:
        git checkout 8810df37762746657cfe84014a8f30758e8f366a
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

>> ERROR: "vring_del_virtqueue" [drivers/misc/mic/vop/vop.ko] undefined!
>> ERROR: "register_virtio_device" [drivers/misc/mic/vop/vop.ko] undefined!
>> ERROR: "unregister_virtio_device" [drivers/misc/mic/vop/vop.ko] undefined!
>> ERROR: "vring_new_virtqueue" [drivers/misc/mic/vop/vop.ko] undefined!
>> ERROR: "virtio_config_changed" [drivers/misc/mic/vop/vop.ko] undefined!
>> ERROR: "vring_interrupt" [drivers/misc/mic/vop/vop.ko] undefined!
>> ERROR: "vring_transport_features" [drivers/misc/mic/vop/vop.ko] undefined!

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