rbtree: fix typo in comment of rb_insert_color

In case 1, it passes down the BLACK color from G to p and u, and maintains
the color of n.  By doing so, it maintains the black height of the sub-tree.

While in the comment, it marks the color of n to BLACK.  This is a typo
and not consistents with the code.

This patch fixs this typo in comment.

Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Acked-by: Michel Lespinasse <walken@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[Linux commit 1b9c53e849aa65776d4f611d99aa09f856518dad]

Ported to Xen for rb_insert_color API.

Signed-off-by: Praveen Kumar <kpraveen.lkml@gmail.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

diff --git a/xen/common/rbtree.c b/xen/common/rbtree.c
index 35bce0f5988d10c345131adce0004ff51638e3f4..9f5498a89d4eb31475a698b9b86b7a74bae1d1c1 100644 (file)
--- a/xen/common/rbtree.c
+++ b/xen/common/rbtree.c
@@ -135,7 +135,7 @@ void rb_insert_color(struct rb_node *node, struct rb_root *root)
                                 *      / \          / \
                                 *     p   u  -->   P   U
                                 *    /            /
-                                *   n            N
+                                *   n            n
                                 *
                                 * However, since g's parent might be red, and
                                 * 4) does not allow this, we need to recurse