From: Zhi Yong Wu <wu...@linux.vnet.ibm.com>
Signed-off-by: Zhi Yong Wu <wu...@linux.vnet.ibm.com>
---
include/linux/rbtree_augmented.h | 3 ++-
lib/rbtree.c | 3 ++-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/include/linux/rbtree_augmented.h b/include/linux/rbtree_augmented.h
index fea49b5..7d19770 100644
--- a/include/linux/rbtree_augmented.h
+++ b/include/linux/rbtree_augmented.h
@@ -199,7 +199,8 @@ __rb_erase_augmented(struct rb_node *node, struct rb_root
*root,
}
successor->rb_left = tmp = node->rb_left;
- rb_set_parent(tmp, successor);
+ if (tmp)
+ rb_set_parent(tmp, successor);
pc = node->__rb_parent_color;
tmp = __rb_parent(pc);
diff --git a/lib/rbtree.c b/lib/rbtree.c
index c0e31fe..329f2bc 100644
--- a/lib/rbtree.c
+++ b/lib/rbtree.c
@@ -226,7 +226,8 @@ ____rb_erase_color(struct rb_node *parent, struct rb_root
*root,
*/
parent->rb_right = tmp1 = sibling->rb_left;
sibling->rb_left = parent;
- rb_set_parent_color(tmp1, parent, RB_BLACK);
+ if (tmp1)
+ rb_set_parent_color(tmp1, parent,
RB_BLACK);
__rb_rotate_set_parents(parent, sibling, root,
RB_RED);
augment_rotate(parent, sibling);
--
1.7.11.7
--
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