[merged mm-stable] mm-shrinker-fix-name-consistency-issue-in-shrinker_debugfs_rename.patch removed from -mm tree

[Andrew Morton <akpm@linux-foundation.org>]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 2043 bytes --]


The quilt patch titled
     Subject: mm/shrinker: fix name consistency issue in shrinker_debugfs_rename()
has been removed from the -mm tree.  Its filename was
     mm-shrinker-fix-name-consistency-issue-in-shrinker_debugfs_rename.patch

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

------------------------------------------------------
From: Liu Ye <liuye@kylinos.cn>
Subject: mm/shrinker: fix name consistency issue in shrinker_debugfs_rename()
Date: Wed, 5 Mar 2025 15:17:59 +0800

After calling debugfs_change_name function, the return value should be
checked and the old name restored.  If debugfs_change_name fails, the new
name memory should be freed.  The effect is that the shrinker->name is not
consistent with the name displayed in debugfs.

Link: https://lkml.kernel.org/r/20250305071759.661055-1-liuye@kylinos.cn
Signed-off-by: Liu Ye <liuye@kylinos.cn>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Reviewed-by：Qi Zheng <zhengqi.arch@bytedance.co
Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Qi Zheng <zhengqi.arch@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/shrinker_debug.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/mm/shrinker_debug.c~mm-shrinker-fix-name-consistency-issue-in-shrinker_debugfs_rename
+++ a/mm/shrinker_debug.c
@@ -214,10 +214,14 @@ int shrinker_debugfs_rename(struct shrin
 	ret = debugfs_change_name(shrinker->debugfs_entry, "%s-%d",
 			shrinker->name, shrinker->debugfs_id);
 
+	if (ret) {
+		shrinker->name = old;
+		kfree_const(new);
+	} else {
+		kfree_const(old);
+	}
 	mutex_unlock(&shrinker_mutex);
 
-	kfree_const(old);
-
 	return ret;
 }
 EXPORT_SYMBOL(shrinker_debugfs_rename);
_

Patches currently in -mm which might be from liuye@kylinos.cn are

mm-vmalloc-refactoring-function-__vmalloc_node_range_noprof.patch
mm-debug-add-line-breaks.patch