The quilt patch titled
Subject: maple_tree: root node could be handled by !p_slot too
has been removed from the -mm tree. Its filename was
maple_tree-root-node-could-be-handled-by-p_slot-too.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
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
mm-mlock-set-the-correct-prev-on-failure.patch
maple_tree-print-empty-for-an-empty-tree-on-mt_dump.patch
maple_tree-the-return-value-of-mas_root_expand-is-not-used.patch
maple_tree-not-necessary-to-check-index-last-again.patch
maple_tree-refine-mas_store_root-on-storing-null.patch
maple_tree-add-a-test-checking-storing-null.patch
