811 struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,  in debugfs_rename()  argument
822 	if (IS_ERR_OR_NULL(old_dentry))  in debugfs_rename()
823 		return old_dentry;  in debugfs_rename()
830 	if (d_really_is_negative(old_dentry) || old_dentry == trap ||  in debugfs_rename()
831 	    d_mountpoint(old_dentry))  in debugfs_rename()
838 	take_dentry_name_snapshot(&old_name, old_dentry);  in debugfs_rename()
840 	error = simple_rename(&init_user_ns, d_inode(old_dir), old_dentry,  in debugfs_rename()
846 	d_move(old_dentry, dentry);  in debugfs_rename()
848 		d_is_dir(old_dentry),  in debugfs_rename()
849 		NULL, old_dentry);  in debugfs_rename()
853 	return old_dentry;  in debugfs_rename()