+ kfence-allow-create-debugfs-dir-file-unconditionally.patch added to mm-new branch

+ kfence-allow-create-debugfs-dir-file-unconditionally.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: kfence: allow create debugfs dir/file unconditionally
has been added to the -mm mm-new branch.  Its filename is
     kfence-allow-create-debugfs-dir-file-unconditionally.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kfence-allow-create-debugfs-dir-file-unconditionally.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

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------------------------------------------------------
From: yuan linyu <yuanlinyu@honor.com>
Subject: kfence: allow create debugfs dir/file unconditionally
Date: Thu, 18 Dec 2025 09:58:48 +0800

When add boot parameter kfence.sample_interval=0, it will not create
debugfs dir/file, but when user change this parameter after boot, it can
enable kfence, there is no debugfs info to check the kfence state.

Remove kfence_enabled check in kfence_debugfs_init() to create debugfs
unconditionally.

Link: https://lkml.kernel.org/r/20251218015849.1414609-3-yuanlinyu@honor.com
Signed-off-by: yuan linyu <yuanlinyu@honor.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Marco Elver <elver@google.com>
Cc: WANG Xuerui <kernel@xen0n.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/kfence/core.c |    3 ---
 1 file changed, 3 deletions(-)

--- a/mm/kfence/core.c~kfence-allow-create-debugfs-dir-file-unconditionally
+++ a/mm/kfence/core.c
@@ -782,9 +782,6 @@ static int kfence_debugfs_init(void)
 {
 	struct dentry *kfence_dir;
 
-	if (!READ_ONCE(kfence_enabled))
-		return 0;
-
 	kfence_dir = debugfs_create_dir("kfence", NULL);
 	debugfs_create_file("stats", 0444, kfence_dir, NULL, &stats_fops);
 	debugfs_create_file("objects", 0400, kfence_dir, NULL, &objects_fops);
_

Patches currently in -mm which might be from yuanlinyu@honor.com are

loongarch-kfence-avoid-use-config_kfence_num_objects.patch
kfence-allow-create-debugfs-dir-file-unconditionally.patch
kfence-allow-change-number-of-object-by-early-parameter.patch