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>
Subject: [PATCH] maple_tree: root node could be handled by !p_slot too
Date: Fri, 13 Sep 2024 06:31:28 +0000 [thread overview]
Message-ID: <20240913063128.27391-1-richard.weiyang@gmail.com> (raw)
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@gmail.com>
CC: Liam R. Howlett <Liam.Howlett@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
next reply other threads:[~2024-09-13 6:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-13 6:31 Wei Yang [this message]
2024-09-13 14:17 ` Liam R. Howlett
2024-10-13 14:41 ` Wei Yang
2024-10-14 2:06 ` Liam R. Howlett
2024-10-14 2:49 ` Wei Yang
2024-10-15 1:13 ` Liam R. Howlett
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