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From: Wei Yang <richard.weiyang@gmail.com>
To: Liam.Howlett@oracle.com, akpm@linux-foundation.org
Cc: maple-tree@lists.infradead.org, linux-mm@kvack.org,
	Wei Yang <richard.weiyang@gmail.com>,
	"Liam R . Howlett" <Liam.Howlett@Oracle.com>,
	Sidhartha Kumar <sidhartha.kumar@oracle.com>,
	Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Subject: [PATCH 1/2] maple_tree: not necessary to check index/last again
Date: Tue, 15 Oct 2024 23:39:08 +0000	[thread overview]
Message-ID: <20241015233909.23592-2-richard.weiyang@gmail.com> (raw)
In-Reply-To: <20241015233909.23592-1-richard.weiyang@gmail.com>

Before calling mas_new_root(), the range has been checked.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
CC: Liam R. Howlett <Liam.Howlett@Oracle.com>
CC: Sidhartha Kumar <sidhartha.kumar@oracle.com>
CC: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
---
 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 0aa9fa8fa7de..3a12866a4a89 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -3594,7 +3594,7 @@ static inline void mas_new_root(struct ma_state *mas, void *entry)
 	void __rcu **slots;
 	unsigned long *pivots;
 
-	if (!entry && !mas->index && mas->last == ULONG_MAX) {
+	if (!entry) {
 		mas->depth = 0;
 		mas_set_height(mas);
 		rcu_assign_pointer(mas->tree->ma_root, entry);
-- 
2.34.1



  reply	other threads:[~2024-10-15 23:39 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-10-15 23:39 [PATCH 0/2] fix mas_new_root() Wei Yang
2024-10-15 23:39 ` Wei Yang [this message]
2024-10-15 23:39 ` [PATCH 2/2] maple_tree: one single entry couldn't represent the whole range Wei Yang
2024-10-16  1:27   ` Liam R. Howlett
2024-10-16  0:42 ` [PATCH 0/2] fix mas_new_root() Liam R. Howlett
2024-10-16  1:25   ` Liam R. Howlett
2024-10-16  2:18     ` Wei Yang
2024-10-16  2:32       ` Liam R. Howlett
2024-10-16  3:16         ` Wei Yang
2024-10-16  3:24         ` Wei Yang

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