The patch titled
Subject: maple_tree: root node could be handled by !p_slot too
has been added to the -mm mm-unstable branch. Its filename is
maple_tree-root-node-could-be-handled-by-p_slot-too.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-root-node-could-be-handled-by-p_slot-too.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: maple_tree: root node could be handled by !p_slot too
Date: Fri, 13 Sep 2024 06:31:28 +0000
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.
Link: https://lkml.kernel.org/r/20240913063128.27391-1-richard.weiyang@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Reviewed-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/maple_tree.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/lib/maple_tree.c~maple_tree-root-node-could-be-handled-by-p_slot-too
+++ a/lib/maple_tree.c
@@ -2155,9 +2155,7 @@ static inline bool mas_prev_sibling(stru
{
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;
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
maple_tree-i-is-always-less-than-or-equal-to-mas_end.patch
maple_tree-goto-complete-directly-on-a-pivot-of-0.patch
maple_tree-remove-maple_big_nodeparent.patch
maple_tree-memset-maple_big_node-as-a-whole.patch
maple_tree-root-node-could-be-handled-by-p_slot-too.patch
