[PATCH] maple_tree: root node could be handled by !p_slot too

[Wei Yang]

For a root node, mte_parent_slot() return 0, this exactly fits the
following !p_slot check.

So we can remove the special handling for root node.

Signed-off-by: Wei Yang <richard.weiyang at gmail.com>
CC: Liam R. Howlett <Liam.Howlett at Oracle.com>
---
 lib/maple_tree.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 85bd651e7770..b5dde94cc7a9 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -2100,9 +2100,7 @@ static inline bool mas_prev_sibling(struct ma_state *mas)
 {
 	unsigned int p_slot = mte_parent_slot(mas->node);
 
-	if (mte_is_root(mas->node))
-		return false;
-
+	/* For root node, p_slot is set to 0 by mte_parent_slot(). */
 	if (!p_slot)
 		return false;
 
-- 
2.34.1