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.

Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
---
 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(-)

diff --git a/kernel/liveupdate/kexec_handover_debugfs.c b/kernel/liveupdate/kexec_handover_debugfs.c
index 46e9e6c0791f..454b7d34ddc3 100644
--- a/kernel/liveupdate/kexec_handover_debugfs.c
+++ b/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 kho_debugfs *dbg, const void *fdt)
 
 	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 kho_debugfs *dbg)
 
 	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 @@ __init int kho_out_debugfs_init(struct kho_debugfs *dbg)
 
 __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;
 }
diff --git a/kernel/liveupdate/kexec_handover_internal.h b/kernel/liveupdate/kexec_handover_internal.h
index 17ae101dc6ae..92798346fa5a 100644
--- a/kernel/liveupdate/kexec_handover_internal.h
+++ b/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
diff --git a/tools/testing/selftests/kho/init.c b/tools/testing/selftests/kho/init.c
index 6d9e91d55d68..f0136a30ce8b 100644
--- a/tools/testing/selftests/kho/init.c
+++ b/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)
-- 
2.51.1.821.gb6fe4d2222-goog

On Fri, Oct 24, 2025 at 12:10:01PM -0400, Pasha Tatashin wrote:
> Now, that LUO and KHO both live under kernel/liveupdate, it makes

And they still don't :/

> 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.

No, this is backwards. If anything it will be kho_debugfs_root.
But I don't see why we can't have /sys/kernel/debug/liveupdate alongside
/sys/kernel/debug/kho.
 
@Andrew, please drop this patch for now.

-- 
Sincerely yours,
Mike.

On Sun, 26 Oct 2025 18:32:44 +0200 Mike Rapoport <rppt@kernel.org> wrote:

> @Andrew, please drop this patch for now.

Thanks, I dropped the v8 series.