1 files changed, 17 insertions, 1 deletions

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index ff889e1f11d5..2766b8eba121 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2754,9 +2754,25 @@ static void ext4_feat_release(struct kobject *kobj)
         complete(&ext4_feat->f_kobj_unregister);
 }
 
+static ssize_t ext4_feat_show(struct kobject *kobj,
+                              struct attribute *attr, char *buf)
+{
+        return snprintf(buf, PAGE_SIZE, "supported\n");
+}
+
+/*
+ * We can not use ext4_attr_show/store because it relies on the kobject
+ * being embedded in the ext4_sb_info structure which is definitely not
+ * true in this case.
+ */
+static const struct sysfs_ops ext4_feat_ops = {
+        .show   = ext4_feat_show,
+        .store  = NULL,
+};
+
 static struct kobj_type ext4_feat_ktype = {
         .default_attrs  = ext4_feat_attrs,
-        .sysfs_ops      = &ext4_attr_ops,
+        .sysfs_ops      = &ext4_feat_ops,
         .release        = ext4_feat_release,
 };