Messages in this thread Patch in this message | | | Date | Fri, 20 Aug 2010 11:50:41 +0200 | From | Michal Nazarewicz <> | Subject | [PATCH/RFCv4 1/6] lib: rbtree: rb_root_init() function added |
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Added a rb_root_init() function which initialises a rb_root structure as a red-black tree with at most one element. The rationale is that using rb_root_init(root, node) is more straightforward and cleaner then first initialising and empty tree followed by an insert operation.
Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> --- include/linux/rbtree.h | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h index 7066acb..5b6dc66 100644 --- a/include/linux/rbtree.h +++ b/include/linux/rbtree.h @@ -130,6 +130,17 @@ static inline void rb_set_color(struct rb_node *rb, int color) } #define RB_ROOT (struct rb_root) { NULL, } + +static inline void rb_root_init(struct rb_root *root, struct rb_node *node) +{ + root->rb_node = node; + if (node) { + node->rb_parent_color = RB_BLACK; /* black, no parent */ + node->rb_left = NULL; + node->rb_right = NULL; + } +} + #define rb_entry(ptr, type, member) container_of(ptr, type, member) #define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL) -- 1.7.1
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