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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2017-12-14 15:32:28 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-12-14 16:00:48 -0800 |
| commit | 338f1d9d1b829fec494d053f62820a2ee625b1ec (patch) | |
| tree | 9ac2dd5f45f7e251300f677ccf669efa9ef303cd /include/linux/rbtree.h | |
| parent | include/linux/idr.h: add #include <linux/bug.h> (diff) | |
| download | linux-dev-338f1d9d1b829fec494d053f62820a2ee625b1ec.tar.xz linux-dev-338f1d9d1b829fec494d053f62820a2ee625b1ec.zip | |
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>
Diffstat (limited to 'include/linux/rbtree.h')
| -rw-r--r-- | include/linux/rbtree.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h index d574361943ea..fcbeed4053ef 100644 --- a/include/linux/rbtree.h +++ b/include/linux/rbtree.h @@ -99,6 +99,8 @@ extern void rb_replace_node(struct rb_node *victim, struct rb_node *new, struct rb_root *root); extern void rb_replace_node_rcu(struct rb_node *victim, struct rb_node *new, struct rb_root *root); +extern void rb_replace_node_cached(struct rb_node *victim, struct rb_node *new, + struct rb_root_cached *root); static inline void rb_link_node(struct rb_node *node, struct rb_node *parent, struct rb_node **rb_link) |