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lib/rbtree.c: fix the example typo

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Replace the "Sr" with "sr", the example is wrong if sl and N don't have
child nodes, so sr should be red node.

Link: https://lkml.kernel.org/r/20240628142229.69419-1-zxcvb600870024@gmail.com
Signed-off-by: Hsin Chang Yu <zxcvb600870024@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Hsin Chang Yu 2024-06-28 22:22:29 +08:00 committed by Andrew Morton
parent 255547c6bb
commit cedb08caac
1 changed files with 4 additions and 4 deletions
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8
lib/rbtree.c
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@ -297,9 +297,9 @@ ____rb_erase_color(struct rb_node *parent, struct rb_root *root,
* / \ / \ * / \ / \
* N S --> N sl * N S --> N sl
* / \ \ * / \ \
* sl Sr S * sl sr S
* \ * \
* Sr * sr
* *
* Note: p might be red, and then both * Note: p might be red, and then both
* p and sl are red after rotation(which * p and sl are red after rotation(which
@ -312,9 +312,9 @@ ____rb_erase_color(struct rb_node *parent, struct rb_root *root,
* / \ / \ * / \ / \
* N sl --> P S * N sl --> P S
* \ / \ * \ / \
* S N Sr * S N sr
* \ * \
* Sr * sr
*/ */
tmp1 = tmp2->rb_right; tmp1 = tmp2->rb_right;
WRITE_ONCE(sibling->rb_left, tmp1); WRITE_ONCE(sibling->rb_left, tmp1);