[PATCH 6.1.y] mm/damon/sysfs-schemes: kobject_del() scheme dirs

[SJ Park <sj@kernel.org>]

On CONFIG_DEBUG_KOBJECT_RELEASE enabled kernel, lack of kobject_del()
could cause directories creation failures due to the name conflicts.  Fix
those issues for scheme directories by adding kobject_del() calls.

Link: https://lore.kernel.org/20260628220121.97360-4-sj@kernel.org
Fixes: 7e84b1f8212a ("mm/damon/sysfs: support DAMON-based Operation Schemes")
Signed-off-by: SJ Park <sj@kernel.org>
Cc: <stable@vger.kernel.org> # 5.18.x
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
(cherry picked from commit 05fb6ac98c49be870c5f9ccdfdf95f0107e564ae)
Signed-off-by: SJ Park <sj@kernel.org>
---
 mm/damon/sysfs.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index bb2f4650741fa..7e4fb112d1154 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -954,6 +954,7 @@ static void damon_sysfs_schemes_rm_dirs(struct damon_sysfs_schemes *schemes)
 
 	for (i = 0; i < schemes->nr; i++) {
 		damon_sysfs_scheme_rm_dirs(schemes_arr[i]);
+		kobject_del(&schemes_arr[i]->kobj);
 		kobject_put(&schemes_arr[i]->kobj);
 	}
 	schemes->nr = 0;
@@ -991,13 +992,15 @@ static int damon_sysfs_schemes_add_dirs(struct damon_sysfs_schemes *schemes,
 			goto out;
 		err = damon_sysfs_scheme_add_dirs(scheme);
 		if (err)
-			goto out;
+			goto del_out;
 
 		schemes_arr[i] = scheme;
 		schemes->nr++;
 	}
 	return 0;
 
+del_out:
+	kobject_del(&scheme->kobj);
 out:
 	damon_sysfs_schemes_rm_dirs(schemes);
 	kobject_put(&scheme->kobj);
-- 
2.47.3