func MakeRSlave(mountPoint string) error {
	return ensureMountedAs(mountPoint, "rslave")
}
MakeRSlave ensures a mounted filesystem has the RSLAVE mount option enabled.
See the supported options in flags.go for further reference.
package mount
func MakeShared(mountPoint string) error {
	return ensureMountedAs(mountPoint, "shared")
}
func MakeRShared(mountPoint string) error {
	return ensureMountedAs(mountPoint, "rshared")
}
func MakePrivate(mountPoint string) error {
	return ensureMountedAs(mountPoint, "private")
}
func MakeRPrivate(mountPoint string) error {
	return ensureMountedAs(mountPoint, "rprivate")
}
func MakeSlave(mountPoint string) error {
	return ensureMountedAs(mountPoint, "slave")
}