On 2017-11-09 13:24, Chris Wilson wrote:
Add a variant of rbtree_replace_node() that maintains the leftmost
cached of struct rbtree_root_cached when replacing nodes within the
rbtree.
As drm_mm is the only rb_replace_node() being used on an interval tree,
the mistake looks fairly self-contained. Furthermore the only user of
drm_mm_replace_node() is its testsuite...
Fixes: f808c13fd373 ("lib/interval_tree: fast overlap detection")
Testcase: igt/drm_mm/replace
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Davidlohr Bueso <dbueso@xxxxxxx>
Cc: Jérôme Glisse <jglisse@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Thanks!
Acked-by: Davidlohr Bueso <dbueso@xxxxxxx>
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