[Intel-gfx] [PATCH 09/14] drm: Update todo.rst

[Emil Velikov]

On 4 September 2018 at 13:19, Daniel Vetter <daniel at ffwll.ch> wrote:
> On Mon, Sep 03, 2018 at 06:38:44PM +0100, Emil Velikov wrote:
>> On 3 September 2018 at 17:54, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
>>
>> > -Hide legacy cruft better
>> > -------------------------
>> > -
>> > -Way back DRM supported only drivers which shadow-attached to PCI devices with
>> > -userspace or fbdev drivers setting up outputs. Modern DRM drivers take charge
>> > -of the entire device, you can spot them with the DRIVER_MODESET flag.
>> > -
>> > -Unfortunately there's still large piles of legacy code around which needs to
>> > -be hidden so that driver writers don't accidentally end up using it. And to
>> > -prevent security issues in those legacy IOCTLs from being exploited on modern
>> > -drivers. This has multiple possible subtasks:
>> > -
>>
>> > -* Extract support code for legacy features into a ``drm-legacy.ko`` kernel
>> > -  module and compile it only when one of the legacy drivers is enabled.
>> > -
>> This isn't done,
>
> Yup, but I kinda figured I'll give up on this idea. The code is hidden
> well enough, I don't think a drm-legacy.ko will buy us much. Except lots
> of churn on older driver's Kconfig entries for no purpose.
>
> There's been a patch already a while back to hide the legacy drivers
> better, and Dave nacked it. So I'm not really for pushing this idea
> anymore as a good task for newbies (which todo.rst tries to collect).
>
> Want me to explain this a bit better in the commit message?

I have sort-of been chipping on that. Now the grand master approach
you've used, but still.
Up-to you if you'd want to drop, but please add a small mention in the
commit message.

Thanks
Emil