Signed-off-by: Daniel Santos <daniel.san...@pobox.com>
---
include/linux/rbtree.h | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h
index 5f10915..c815b5e 100644
--- a/include/linux/rbtree.h
+++ b/include/linux/rbtree.h
@@ -35,6 +35,20 @@
#include <linux/bug.h>
#include <linux/kconfig.h>
+/**
+ * struct rb_node
+ * @__rb_parent_color: Contains the color in the lower 2 bits (although only
+ * bit zero is currently used) and the address of the
+ * parent in the rest (lower 2 bits of address should
+ * always be zero on any arch supported). If the node is
+ * initialized and not a member of any tree, the parent
+ * point to its self. If the node belongs to a tree, but
+ * is the root element, the parent will be NULL.
+ * Otherwise, parent will always point to the parent node
+ * in the tree.
+ * @rb_right: Pointer to the right element.
+ * @rb_left: Pointer to the left element.
+ */
struct rb_node {
unsigned long __rb_parent_color;
struct rb_node *rb_right;
--
1.7.3.4
--
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