complete -c mountpoint -s d -l fs-devno -d 'Show the major/minor numbers of the device that is mounted on the given directory.'
complete -c mountpoint -s x -l devno -d 'Show the major/minor numbers of the given blockdevice on standard output.'
complete -c mountpoint -s q -l quiet -d 'Be quiet - don’t print anything.'
complete -c mountpoint -s h -l help -d 'Print help (see more with \'--help\')'