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Message-Id: <20221026120029.12555-2-lukas.bulwahn@gmail.com>
Date: Wed, 26 Oct 2022 14:00:29 +0200
From: Lukas Bulwahn <lukas.bulwahn@...il.com>
To: "Liam R . Howlett" <Liam.Howlett@...cle.com>,
Matthew Wilcox <willy@...radead.org>,
Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org
Cc: kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
Lukas Bulwahn <lukas.bulwahn@...il.com>
Subject: [PATCH 1/1] lib: maple_tree: remove unneeded initialization in mtree_range_walk()
Before the do-while loop in mtree_range_walk(), the variables next, min,
max need to be initialized. The variables last, prev_min and prev_max are
set within the loop body before they are eventually used after exiting the
loop body.
As it is a do-while loop, the loop body is executed at least once, so the
variables last, prev_min and prev_max do not need to be initialized before
the loop body.
Remove unneeded initialization of last and prev_min.
The needless initialization was reported by clang-analyzer as Dead Stores.
As the compiler already identifies these assignments as unneeded, it
optimizes the assignments away. Hence:
No functional change. No change in object code.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...il.com>
---
lib/maple_tree.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index e1743803c851..fbde494444b8 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -2903,8 +2903,8 @@ static inline void *mtree_range_walk(struct ma_state *mas)
unsigned long max, min;
unsigned long prev_max, prev_min;
- last = next = mas->node;
- prev_min = min = mas->min;
+ next = mas->node;
+ min = mas->min;
max = mas->max;
do {
offset = 0;
--
2.17.1
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