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authorChris Wilson <chris@chris-wilson.co.uk>2017-12-14 15:32:28 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-12-14 16:00:48 -0800
commit338f1d9d1b829fec494d053f62820a2ee625b1ec (patch)
tree9ac2dd5f45f7e251300f677ccf669efa9ef303cd /Documentation/s390
parentc47d7f56e914900410f65835933f9fc4374d0a2b (diff)
lib/rbtree,drm/mm: add rbtree_replace_node_cached()
Add a variant of rbtree_replace_node() that maintains the leftmost cache 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... Testcase: igt/drm_mm/replace Link: http://lkml.kernel.org/r/20171122100729.3742-1-chris@chris-wilson.co.uk Link: https://patchwork.freedesktop.org/patch/msgid/20171109212435.9265-1-chris@chris-wilson.co.uk Fixes: f808c13fd373 ("lib/interval_tree: fast overlap detection") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Acked-by: Davidlohr Bueso <dbueso@suse.de> Cc: Jérôme Glisse <jglisse@redhat.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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