From 1aecabb5b2d1dc1a821cdecda607eb70a8dd5124 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Mon, 19 Feb 2018 15:57:08 +0100 Subject: [PATCH] drm/todo: Add idr_init_base todo Suggested-by: Chris Wilson Cc: Chris Wilson Acked-by: Chris Wilson Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20180219145708.23523-1-daniel.vetter@ffwll.ch --- 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 =================