linux-kernel - [PATCH RFC] maple_tree: should get pivots boundary by type

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Date:   Thu, 10 Nov 2022 07:24:59 +0000
From:   Wei Yang <richard.weiyang@...il.com>
To:     Liam.Howlett@...cle.com
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Wei Yang <richard.weiyang@...il.com>,
        "Liam R . Howlett" <Liam.Howlett@...cle.com>
Subject: [PATCH RFC] maple_tree: should get pivots boundary by type

If my understanding is correct, we should get pivots boundary by type.

Signed-off-by: Wei Yang <richard.weiyang@...il.com>
CC: Liam R. Howlett <Liam.Howlett@...cle.com>

---
* kernel build looks good
---
 lib/maple_tree.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 73e2e6434e2f..2123d1930a9b 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -669,12 +669,13 @@ static inline unsigned long mte_pivot(const struct maple_enode *mn,
 				 unsigned char piv)
 {
 	struct maple_node *node = mte_to_node(mn);
+	enum maple_type type = mte_node_type(mn);
 
-	if (piv >= mt_pivots[piv]) {
+	if (piv >= mt_pivots[type]) {
 		WARN_ON(1);
 		return 0;
 	}
-	switch (mte_node_type(mn)) {
+	switch (type) {
 	case maple_arange_64:
 		return node->ma64.pivot[piv];
 	case maple_range_64:
-- 
2.33.1