Re: [PATCH v2 1/2] fbdev: Split frame buffer support in FB and FB_CORE symbols

[Javier Martinez Canillas]

Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> writes:

> Hi Arnd,
>

[...]

>>
>> That would leave CONFIG_FB_DEVICE as the only user visible option
>> for DRM-only configs, which is slightly odd for the menuconfig,
>> so I still wonder if that could be done differently.
>>
>> Is there actually a point in configurations for kernels with FB=y,
>> DRM=n and FB_DEVICE=n? If we don't expect that to be a useful
>> configuration, an easier way would be to have CONFIG_FB turn it
>> on implicitly and instead have a user-visible Kconfig option
>> below CONFIG_DRM_FBDEV_EMULATION that allows controlling the
>> creation of /dev/fb*.
>
> Such a combination would allow the user to still have a text console
> on a legacy fbdev, while not having to worry about possible security
> ramifications of providing fbdev userspace access.
>

Exactly, it may be a possible combination. Not sure how useful what would
be in practice but we shouldn't restrict that IMO.

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat