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

[Daniel Vetter]

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?
-Daniel

> 
> > -This is mostly done, the only thing left is to split up ``drm_irq.c`` into
> > -legacy cruft and the parts needed by modern KMS drivers.
> > -
> ... while this one is.
> 
> HTH
> -Emil

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch