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From: Wei Yang <richard.weiyang@gmail.com>
To: akpm@linux-foundation.org, Liam.Howlett@oracle.com
Cc: maple-tree@lists.infradead.org, linux-mm@kvack.org,
	Wei Yang <richard.weiyang@gmail.com>,
	"Liam R . Howlett" <Liam.Howlett@Oracle.com>,
	stable@vger.kernel.org
Subject: [PATCH 2/3] maple_tree: restart walk on correct status
Date: Sat,  8 Feb 2025 01:18:51 +0000	[thread overview]
Message-ID: <20250208011852.31434-3-richard.weiyang@gmail.com> (raw)
In-Reply-To: <20250208011852.31434-1-richard.weiyang@gmail.com>

Commit a8091f039c1e ("maple_tree: add MAS_UNDERFLOW and MAS_OVERFLOW
states") adds more status during maple tree walk. But it introduce a
typo on the status check during walk.

It expects to mean neither active nor start, we would restart the walk,
while current code means we would always restart the walk.

Fixes: a8091f039c1e ("maple_tree: add MAS_UNDERFLOW and MAS_OVERFLOW states")
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
CC: Liam R. Howlett <Liam.Howlett@Oracle.com>
CC: <stable@vger.kernel.org>
---
 lib/maple_tree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index d31f0a2858f7..e64ffa5b9970 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -4899,7 +4899,7 @@ void *mas_walk(struct ma_state *mas)
 {
 	void *entry;
 
-	if (!mas_is_active(mas) || !mas_is_start(mas))
+	if (!mas_is_active(mas) && !mas_is_start(mas))
 		mas->status = ma_start;
 retry:
 	entry = mas_state_walk(mas);
-- 
2.34.1



  parent reply	other threads:[~2025-02-08  1:26 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-02-08  1:18 [PATCH 0/3] may miss to set node dead on destroy Wei Yang
2025-02-08  1:18 ` [PATCH 1/3] maple_tree: " Wei Yang
2025-02-10 14:19   ` Liam R. Howlett
2025-02-11  7:48     ` Wei Yang
2025-02-11 15:23       ` Liam R. Howlett
2025-02-12  0:26         ` Wei Yang
2025-02-08  1:18 ` Wei Yang [this message]
2025-02-10 14:20   ` [PATCH 2/3] maple_tree: restart walk on correct status Liam R. Howlett
2025-02-08  1:18 ` [PATCH 3/3] maple_tree: assert retrieving new value on a tree with only root node Wei Yang
2025-02-10 14:18   ` Liam R. Howlett
2025-02-11  8:02     ` Wei Yang
2025-02-11 15:25       ` Liam R. Howlett
2025-02-12  0:41         ` Wei Yang
2025-02-10 14:31 ` [PATCH 0/3] may miss to set node dead on destroy Liam R. Howlett
2025-02-11  8:11   ` Wei Yang
2025-02-11 15:28     ` Liam R. Howlett
2025-02-12  0:49       ` Wei Yang
2025-02-12  0:55       ` Wei Yang
2025-03-04 12:07         ` Wei Yang
2025-03-04 14:45           ` Liam R. Howlett
2025-03-05  0:32             ` Wei Yang

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