Re: [PATCH] drm/vmwgfx: select FB when DRM_VMWGFX is selected

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On Mon, Sep 1, 2014 at 3:20 AM, Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote:
> On 08/31/14 16:07, Max Filippov wrote:
>> Otherwise, if FB is not selected build fails at linking step:
>>   vmwgfx_fb.c:(.text+0x4098b): undefined reference to `register_framebuffer'
>>   vmwgfx_fb.c:(.text+0x409c0): undefined reference to `framebuffer_release'
>>   vmwgfx_fb.c:(.text+0x409f4): undefined reference to `unregister_framebuffer'
>>   vmwgfx_fb.c:(.text+0x40a0e): undefined reference to `framebuffer_release'
>>
>> Patch ae6445ac7475ff05 drm/vmwgfx: depends on FB
>> added dependency on FB that was subsequently removed in patch
>> 04381b987292256d drm: Move plane helpers into drm_kms_helper.ko
>>
>> Signed-off-by: Max Filippov <jcmvbkbc@xxxxxxxxx>
>> ---
>>  drivers/gpu/drm/vmwgfx/Kconfig |    1 +
>>  1 files changed, 1 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/vmwgfx/Kconfig b/drivers/gpu/drm/vmwgfx/Kconfig
>> index 67720f7..4fba548 100644
>> --- a/drivers/gpu/drm/vmwgfx/Kconfig
>> +++ b/drivers/gpu/drm/vmwgfx/Kconfig
>> @@ -1,6 +1,7 @@
>>  config DRM_VMWGFX
>>       tristate "DRM driver for VMware Virtual GPU"
>>       depends on DRM && PCI
>> +     select FB
>>       select FB_DEFERRED_IO
>>       select FB_CFB_FILLRECT
>>       select FB_CFB_COPYAREA
>>
>
> My experience with these "select FB_*" things is that this symbol (DRM_VMWGFX)
> should still depend on FB.  Has something changed recently to negate that?

I see the following if I replace 'select FB' with 'depends on FB':

drivers/video/fbdev/Kconfig:5:error: recursive dependency detected!
drivers/video/fbdev/Kconfig:5:  symbol FB is selected by DRM_KMS_FB_HELPER
drivers/gpu/drm/Kconfig:39:     symbol DRM_KMS_FB_HELPER depends on
DRM_KMS_HELPER
drivers/gpu/drm/Kconfig:33:     symbol DRM_KMS_HELPER is selected by DRM_VMWGFX
drivers/gpu/drm/vmwgfx/Kconfig:1:       symbol DRM_VMWGFX depends on FB

-- 
Thanks.
-- Max
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