From:   Peng Zhang <zhangpeng.00@bytedance.com>
To:     Liam.Howlett@oracle.com, snild@sony.com
Cc:     linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        maple-tree@lists.infradead.org, Stable@vger.kernel.org,
        Peng Zhang <zhangpeng.00@bytedance.com>
Subject: [PATCH] maple_tree: Fix the error of mas->min/max in mas_skip_node()
Date:   Wed,  8 Mar 2023 00:03:40 +0800
Message-Id: <20230307160340.57074-1-zhangpeng.00@bytedance.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

The assignment of mas->min and mas->max is wrong. mas->min and mas->max
should represent the range of the current node. After mas_ascend()
returns, mas-min and mas->max already represent the range of the current
node, so we should delete these assignments of mas->min and mas->max.

Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
---
 lib/maple_tree.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index f5bee48de569..d4ddf7f8adc7 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -5157,9 +5157,6 @@ static inline bool mas_rewind_node(struct ma_state *mas)
  */
 static inline bool mas_skip_node(struct ma_state *mas)
 {
-	unsigned long *pivots;
-	enum maple_type mt;
-
 	if (mas_is_err(mas))
 		return false;
 
@@ -5173,14 +5170,7 @@ static inline bool mas_skip_node(struct ma_state *mas)
 			mas_ascend(mas);
 		}
 	} while (mas->offset >= mas_data_end(mas));
-
-	mt = mte_node_type(mas->node);
-	pivots = ma_pivots(mas_mn(mas), mt);
-	mas->min = pivots[mas->offset] + 1;
 	mas->offset++;
-	if (mas->offset < mt_slots[mt])
-		mas->max = pivots[mas->offset];
-
 	return true;
 }
 
-- 
2.20.1