static int __debugfs_remove(struct dentry *dentry, struct dentry *parent)
{
	int ret = 0;

	if (simple_positive(dentry)) {
		dget(dentry);
		if (d_is_dir(dentry))
			ret = simple_rmdir(d_inode(parent), dentry);
		else
			simple_unlink(d_inode(parent), dentry);
		if (!ret)
			d_delete(dentry);
		dput(dentry);
	}
	return ret;
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.