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Message-Id: <20221220142606.1698836-8-vernon2gm@gmail.com>
Date: Tue, 20 Dec 2022 22:26:05 +0800
From: Vernon Yang <vernon2gm@...il.com>
To: Liam.Howlett@...cle.com, akpm@...ux-foundation.org
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org,
Vernon Yang <vernon2gm@...il.com>
Subject: [PATCH 7/8] maple_tree: refine ma_state init from mas_start()
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.
Signed-off-by: Vernon Yang <vernon2gm@...il.com>
---
lib/maple_tree.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index e7dde4a1d6cb..16cdcf309e97 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -1329,7 +1329,7 @@ static void mas_node_count(struct ma_state *mas, int count)
* 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_start(struct ma_state *mas)
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;
}
--
2.34.1
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