[merged mm-hotfixes-stable] lib-maple_tree-remove-unneeded-initialization-in-mtree_range_walk.patch removed from -mm tree

[merged mm-hotfixes-stable] lib-maple_tree-remove-unneeded-initialization-in-mtree_range_walk.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: lib: maple_tree: remove unneeded initialization in mtree_range_walk()
has been removed from the -mm tree.  Its filename was
     lib-maple_tree-remove-unneeded-initialization-in-mtree_range_walk.patch

This patch was dropped because it was merged into the mm-hotfixes-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Subject: lib: maple_tree: remove unneeded initialization in mtree_range_walk()
Date: Wed, 26 Oct 2022 14:00:29 +0200

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.

Link: https://lkml.kernel.org/r/20221026120029.12555-2-lukas.bulwahn@gmail.com
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/lib/maple_tree.c~lib-maple_tree-remove-unneeded-initialization-in-mtree_range_walk
+++ a/lib/maple_tree.c
@@ -2903,8 +2903,8 @@ static inline void *mtree_range_walk(str
 	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;
_

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

mm-shmem-remove-unneeded-assignments-in-shmem_get_folio_gfp.patch