I've not come across FS_IOC_GETVERSION before. Should the many user-mode applications that rely on st_dev, st_ino being enough to identify an inode also be call

I've not come across FS_IOC_GETVERSION before. Should the many user-mode applications that rely on st_dev, st_ino being enough to identify an inode also be calling this ioctl? Or is it something you only need to worry about in limited circumstances?