debugfs: switch to ->free_inode()

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

fs/debugfs/inode.c

@@ -163,24 +163,18 @@ static int debugfs_show_options(struct seq_file *m, struct dentry *root)
 	return 0;
 }
 
-static void debugfs_i_callback(struct rcu_head *head)
+static void debugfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	if (S_ISLNK(inode->i_mode))
 		kfree(inode->i_link);
 	free_inode_nonrcu(inode);
 }
 
-static void debugfs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, debugfs_i_callback);
-}
-
 static const struct super_operations debugfs_super_operations = {
 	.statfs		= simple_statfs,
 	.remount_fs	= debugfs_remount,
 	.show_options	= debugfs_show_options,
-	.destroy_inode	= debugfs_destroy_inode,
+	.free_inode	= debugfs_free_inode,
 };
 
 static void debugfs_release_dentry(struct dentry *dentry)