umount_fs
error = umount_fs(mp->am_path);
error = umount_fs(dir);
error = (*mf->mf_ops->umount_fs)(mp);
return (umount_fs(mf->mf_mount));
return umount_fs(mf->mf_mount);
extern int umount_fs(char *);
vumount_fs umount_fs;