i915_drv.c:undefined reference to `remove_conflicting_framebuffers'

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   86a1679860babbacd61fc1e8c0c0f43641d5860d
commit: 2383050f6a3a2e00636eabfcf66445af653ddd80 Merge remote-tracking branch 'airlied/drm-next' into topic/drm-misc
date:   6 weeks ago
config: x86_64-randconfig-b0-08311939 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
        git checkout 2383050f6a3a2e00636eabfcf66445af653ddd80
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/built-in.o: In function `i915_driver_init_hw':
>> i915_drv.c:(.text+0x154445): undefined reference to `remove_conflicting_framebuffers'
   drivers/built-in.o: In function `mga_vram_init':
   mgag200_main.c:(.text+0x228549): undefined reference to `remove_conflicting_framebuffers'
   drivers/built-in.o: In function `mga_pci_probe':
   mgag200_drv.c:(.text+0x22cc25): undefined reference to `remove_conflicting_framebuffers'
   drivers/built-in.o: In function `cirrus_pci_probe':
   cirrus_drv.c:(.text+0x22f2da): undefined reference to `remove_conflicting_framebuffers'
   drivers/built-in.o: In function `nouveau_drm_probe':
   nouveau_drm.c:(.text+0x2d6215): undefined reference to `remove_conflicting_framebuffers'
   drivers/built-in.o: In function `qxlfb_create':
   qxl_fb.c:(.text+0x3234f8): undefined reference to `fb_deferred_io_init'
   drivers/built-in.o: In function `drm_virtio_init':
   (.text+0x3294cf): undefined reference to `remove_conflicting_framebuffers'

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