The patch titled
Subject: maple_tree: refine ma_state init from mas_start()
has been added to the -mm mm-unstable branch. Its filename is
maple_tree-refine-ma_state-init-from-mas_start.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-refine-ma_state-init-from-mas_start.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: Vernon Yang <vernon2gm@xxxxxxxxx>
Subject: maple_tree: refine ma_state init from mas_start()
Date: Wed, 21 Dec 2022 14:00:57 +0800
If mas->node is an MAS_START, there are three cases, and they all assign
different values to mas->node and mas->offset. So there is no need to set
them to a default value before updating.
Update them directly to make them easier to understand and for better
readability.
Link: https://lkml.kernel.org/r/20221221060058.609003-7-vernon2gm@xxxxxxxxx
Signed-off-by: Vernon Yang <vernon2gm@xxxxxxxxx>
Reviewed-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/maple_tree.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/lib/maple_tree.c~maple_tree-refine-ma_state-init-from-mas_start
+++ a/lib/maple_tree.c
@@ -1329,7 +1329,7 @@ static void mas_node_count(struct ma_sta
* mas_start() - Sets up maple state for operations.
* @mas: The maple state.
*
- * If mas->node == MAS_START, then set the min, max, depth, and offset to
+ * If mas->node == MAS_START, then set the min, max and depth to
* defaults.
*
* Return:
@@ -1343,22 +1343,22 @@ static inline struct maple_enode *mas_st
if (likely(mas_is_start(mas))) {
struct maple_enode *root;
- mas->node = MAS_NONE;
mas->min = 0;
mas->max = ULONG_MAX;
mas->depth = 0;
- mas->offset = 0;
root = mas_root(mas);
/* Tree with nodes */
if (likely(xa_is_node(root))) {
mas->depth = 1;
mas->node = mte_safe_root(root);
+ mas->offset = 0;
return NULL;
}
/* empty tree */
if (unlikely(!root)) {
+ mas->node = MAS_NONE;
mas->offset = MAPLE_NODE_SLOTS;
return NULL;
}
_
Patches currently in -mm which might be from vernon2gm@xxxxxxxxx are
maple_tree-remove-extra-space-and-blank-line.patch
maple_tree-remove-extra-return-statement.patch
maple_tree-use-mt_node_max-instead-of-direct-operations-mt_max.patch
maple_tree-use-macro-ma_root_parent-instead-of-number.patch
maple_tree-remove-the-redundant-code.patch
maple_tree-refine-ma_state-init-from-mas_start.patch
maple_tree-refine-mab_calc_split-function.patch
