+ liveupdate-kho-move-kho-debugfs-directory-to-liveupdate.patch added to mm-nonmm-unstable branch

+ liveupdate-kho-move-kho-debugfs-directory-to-liveupdate.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: liveupdate: kho: move kho debugfs directory to liveupdate
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     liveupdate-kho-move-kho-debugfs-directory-to-liveupdate.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/liveupdate-kho-move-kho-debugfs-directory-to-liveupdate.patch

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

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------------------------------------------------------
From: Pasha Tatashin <pasha.tatashin@soleen.com>
Subject: liveupdate: kho: move kho debugfs directory to liveupdate
Date: Fri, 24 Oct 2025 12:10:01 -0400

Now, that LUO and KHO both live under kernel/liveupdate, it makes sense to
also move the kho debugfs files to liveupdate/ in order to keep current
and upcoming LUO/KHO features organized.

The old names:
/sys/kernel/debug/kho/out/
/sys/kernel/debug/kho/in/

The new names:
/sys/kernel/debug/liveupdate/kho_out/
/sys/kernel/debug/liveupdate/kho_in/

Also, export the liveupdate_debufs_root, so future LUO selftests, kexec
telemtry, and other users could use it as well.

Link: https://lkml.kernel.org/r/20251024161002.747372-8-pasha.tatashin@soleen.com
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Alexander Graf <graf@amazon.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: "Mike Rapoport (Microsoft)" <rppt@kernel.org>
Cc: Pratyush Yadav <pratyush@kernel.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/liveupdate/kexec_handover_debugfs.c  |   10 +++++-----
 kernel/liveupdate/kexec_handover_internal.h |    2 ++
 tools/testing/selftests/kho/init.c          |    2 +-
 3 files changed, 8 insertions(+), 6 deletions(-)

--- a/kernel/liveupdate/kexec_handover_debugfs.c~liveupdate-kho-move-kho-debugfs-directory-to-liveupdate
+++ a/kernel/liveupdate/kexec_handover_debugfs.c
@@ -15,7 +15,7 @@
 #include <linux/mm.h>
 #include "kexec_handover_internal.h"
 
-static struct dentry *debugfs_root;
+struct dentry *liveupdate_debugfs_root;
 
 struct fdt_debugfs {
 	struct list_head list;
@@ -118,7 +118,7 @@ __init void kho_in_debugfs_init(struct k
 
 	INIT_LIST_HEAD(&dbg->fdt_list);
 
-	dir = debugfs_create_dir("in", debugfs_root);
+	dir = debugfs_create_dir("kho_in", liveupdate_debugfs_root);
 	if (IS_ERR(dir)) {
 		err = PTR_ERR(dir);
 		goto err_out;
@@ -178,7 +178,7 @@ __init int kho_out_debugfs_init(struct k
 
 	INIT_LIST_HEAD(&dbg->fdt_list);
 
-	dir = debugfs_create_dir("out", debugfs_root);
+	dir = debugfs_create_dir("kho_out", liveupdate_debugfs_root);
 	if (IS_ERR(dir))
 		return -ENOMEM;
 
@@ -212,8 +212,8 @@ err_rmdir:
 
 __init int kho_debugfs_init(void)
 {
-	debugfs_root = debugfs_create_dir("kho", NULL);
-	if (IS_ERR(debugfs_root))
+	liveupdate_debugfs_root = debugfs_create_dir("liveupdate", NULL);
+	if (IS_ERR(liveupdate_debugfs_root))
 		return -ENOENT;
 	return 0;
 }
--- a/kernel/liveupdate/kexec_handover_internal.h~liveupdate-kho-move-kho-debugfs-directory-to-liveupdate
+++ a/kernel/liveupdate/kexec_handover_internal.h
@@ -15,6 +15,8 @@ struct kho_debugfs {
 	struct list_head fdt_list;
 };
 
+extern struct dentry *liveupdate_debugfs_root;
+
 #else
 struct kho_debugfs {};
 #endif
--- a/tools/testing/selftests/kho/init.c~liveupdate-kho-move-kho-debugfs-directory-to-liveupdate
+++ a/tools/testing/selftests/kho/init.c
@@ -11,7 +11,7 @@
 /* from arch/x86/include/asm/setup.h */
 #define COMMAND_LINE_SIZE	2048
 
-#define KHO_FINALIZE "/debugfs/kho/out/finalize"
+#define KHO_FINALIZE "/debugfs/liveupdate/kho_out/finalize"
 #define KERNEL_IMAGE "/kernel"
 
 static int mount_filesystems(void)
_

Patches currently in -mm which might be from pasha.tatashin@soleen.com are

liveupdate-kho-warn-and-fail-on-metadata-or-preserved-memory-in-scratch-area.patch
liveupdate-kho-increase-metadata-bitmap-size-to-page_size.patch
liveupdate-kho-allocate-metadata-directly-from-the-buddy-allocator.patch
kho-allow-to-drive-kho-from-within-kernel.patch
kho-make-debugfs-interface-optional.patch
kho-add-interfaces-to-unpreserve-folios-and-page-ranges.patch
kho-dont-unpreserve-memory-during-abort.patch
liveupdate-kho-move-to-kernel-liveupdate.patch
liveupdate-kho-move-kho-debugfs-directory-to-liveupdate.patch
memblock-unpreserve-memory-in-case-of-error.patch