static struct dentry *__debugfs_create_file(const char *name, umode_t mode,
				struct dentry *parent, void *data,
				const struct file_operations *proxy_fops,
				const struct file_operations *real_fops)
{
	struct dentry *dentry;
	struct inode *inode;

	if (!(mode & S_IFMT))
		mode |= S_IFREG;
	BUG_ON(!S_ISREG(mode));
	dentry = start_creating(name, parent);

	if (IS_ERR(dentry))
		return NULL;

	inode = debugfs_get_inode(dentry->d_sb);
	if (unlikely(!inode))
		return failed_creating(dentry);

	inode->i_mode = mode;
	inode->i_private = data;

	inode->i_fop = proxy_fops;
	dentry->d_fsdata = (void *)real_fops;

	d_instantiate(dentry, inode);
	fsnotify_create(d_inode(dentry->d_parent), dentry);
	return end_creating(dentry);
}

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.