return EOPNOTSUPP when there is no support for this filesystem in the kernel. This is what most mount_* expect.
return EOPNOTSUPP when there is no support for this filesystem in the kernel.
This is what most mount_* expect.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars