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authorDaniel Vetter <daniel.vetter@ffwll.ch>2018-02-19 15:57:08 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2018-02-19 17:32:12 +0100
commit1aecabb5b2d1dc1a821cdecda607eb70a8dd5124 (patch)
tree7f92d33ab7bbe000419eef07202361c15d8c8b16 /Documentation/gpu/todo.rst
parente86584c5377f4219781492ca164664bce40c0090 (diff)
drm/todo: Add idr_init_base todo
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180219145708.23523-1-daniel.vetter@ffwll.ch
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@@ -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
=================