<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def selinux_fs_path():
    '''
    Return the location of the SELinux VFS directory

    CLI Example:

    .. code-block:: bash

        salt '*' selinux.selinux_fs_path
    '''
    # systems running systemd (e.g. Fedora 15 and newer)
    # have the selinux filesystem in a different location
    try:
        for directory in ('/sys/fs/selinux', '/selinux'):
            if os.path.isdir(directory):
                if os.path.isfile(os.path.join(directory, 'enforce')):
                    return directory
        return None
    # If selinux is Disabled, the path does not exist.
    except AttributeError:
        return None