+ maple_tree-avoid-duplicate-variable-init-in-mast_spanning_rebalance.patch added to mm-unstable branch

+ maple_tree-avoid-duplicate-variable-init-in-mast_spanning_rebalance.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: maple_tree: avoid duplicate variable init in mast_spanning_rebalance()
has been added to the -mm mm-unstable branch.  Its filename is
     maple_tree-avoid-duplicate-variable-init-in-mast_spanning_rebalance.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-avoid-duplicate-variable-init-in-mast_spanning_rebalance.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: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Subject: maple_tree: avoid duplicate variable init in mast_spanning_rebalance()
Date: Mon, 22 Jan 2024 11:20:00 +0100

The local variables r_tmp and l_tmp in mast_spanning_rebalance() are
already initialized at its declaration; there is no need to assign the
value again.

Remove the duplicate initialization of {r,l}_tmp.  No functional change. 
Due to common compiler optimizations, also no change to object code.

This issue was identified with clang-analyzer's dead stores analysis.

Link: https://lkml.kernel.org/r/20240122102000.29558-1-lukas.bulwahn@gmail.com
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/maple_tree.c |    2 --
 1 file changed, 2 deletions(-)

--- a/lib/maple_tree.c~maple_tree-avoid-duplicate-variable-init-in-mast_spanning_rebalance
+++ a/lib/maple_tree.c
@@ -2271,8 +2271,6 @@ bool mast_spanning_rebalance(struct mapl
 	struct ma_state l_tmp = *mast->orig_l;
 	unsigned char depth = 0;
 
-	r_tmp = *mast->orig_r;
-	l_tmp = *mast->orig_l;
 	do {
 		mas_ascend(mast->orig_r);
 		mas_ascend(mast->orig_l);
_

Patches currently in -mm which might be from lukas.bulwahn@gmail.com are

maple_tree-avoid-duplicate-variable-init-in-mast_spanning_rebalance.patch