[PATCH] drm/todo: Add idr_init_base todo

[Alex Deucher]

On Mon, Feb 19, 2018 at 9:57 AM, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> Suggested-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Acked-by: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  Documentation/gpu/todo.rst | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst
> index 1e593370f64f..1a0a413eeced 100644
> --- a/Documentation/gpu/todo.rst
> +++ b/Documentation/gpu/todo.rst
> @@ -212,6 +212,16 @@ probably use drm_fb_helper_fbdev_teardown().
>
>  Contact: Maintainer of the driver you plan to convert
>
> +idr_init_base()
> +---------------
> +
> +DRM core&drivers uses a lot of idr (integer lookup directories) for mapping
> +userspace IDs to internal objects, and in most places ID=0 means NULL and hence
> +is never used. Switching to idr_init_base() for these would make the idr more
> +efficient.
> +
> +Contact: Daniel Vetter
> +
>  Core refactorings
>  =================
>
> --
> 2.15.1
>
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