warning: (DRM_KMS_FB_HELPER && ..) selects FB_DEFERRED_IO which has unmet direct dependencies (HAS_IOMEM && ..)

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   29b4817d4018df78086157ea3a55c1d9424a7cfc
commit: 339b19e3c4ff728a5dcdbd388a5fbe83c1aabc37 drm/ast: make fbdev support really optional
date:   3 weeks ago
config: x86_64-randconfig-s5-08081114 (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        git checkout 339b19e3c4ff728a5dcdbd388a5fbe83c1aabc37
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All error/warnings (new ones prefixed by >>):

warning: (DRM_KMS_FB_HELPER && DRM_VMWGFX && HID_PICOLCD_FB && FB_TFT) selects FB_DEFERRED_IO which has unmet direct dependencies (HAS_IOMEM && FB)
warning: (VIDEO_FB_IVTV && VIDEO_VIVID && DRM_KMS_FB_HELPER && DRM_RADEON && DRM_AMDGPU && DRM_VMWGFX && FB_CLPS711X_OLD && FB_FFB && FB_TCX && FB_CG14 && FB_P9100 && FB_LEO && FB_SM750 && FB_XGI) selects FB_CFB_COPYAREA which has unmet direct dependencies (HAS_IOMEM && FB)
warning: (VIDEO_FB_IVTV && VIDEO_VIVID && DRM_KMS_FB_HELPER && DRM_RADEON && DRM_AMDGPU && DRM_VMWGFX && FB_CLPS711X_OLD && FB_FFB && FB_TCX && FB_CG14 && FB_P9100 && FB_LEO && FB_SM750 && FB_XGI) selects FB_CFB_IMAGEBLIT which has unmet direct dependencies (HAS_IOMEM && FB)
warning: (VIDEO_FB_IVTV && VIDEO_VIVID && DRM_KMS_FB_HELPER && DRM_RADEON && DRM_AMDGPU && DRM_VMWGFX && FB_CLPS711X_OLD && FB_TCX && FB_CG14 && FB_P9100 && FB_LEO && FB_SM750 && FB_XGI) selects FB_CFB_FILLRECT which has unmet direct dependencies (HAS_IOMEM && FB)
>> ERROR: "framebuffer_release" [drivers/gpu/drm/vmwgfx/vmwgfx.ko] undefined!
>> ERROR: "register_framebuffer" [drivers/gpu/drm/vmwgfx/vmwgfx.ko] undefined!
>> ERROR: "framebuffer_alloc" [drivers/gpu/drm/vmwgfx/vmwgfx.ko] undefined!
>> ERROR: "fb_deferred_io_cleanup" [drivers/gpu/drm/vmwgfx/vmwgfx.ko] undefined!
>> ERROR: "fb_deferred_io_init" [drivers/gpu/drm/vmwgfx/vmwgfx.ko] undefined!
>> ERROR: "unregister_framebuffer" [drivers/gpu/drm/vmwgfx/vmwgfx.ko] undefined!
>> ERROR: "remove_conflicting_framebuffers" [drivers/gpu/drm/virtio/virtio-gpu.ko] undefined!
>> ERROR: "remove_conflicting_framebuffers" [drivers/gpu/drm/mgag200/mgag200.ko] undefined!
>> ERROR: "remove_conflicting_framebuffers" [drivers/gpu/drm/cirrus/cirrus.ko] undefined!
>> ERROR: "remove_conflicting_framebuffers" [drivers/gpu/drm/bochs/bochs-drm.ko] undefined!

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