We no longer need to populate ext_ns->mnt.mntinfo_list until
resolve_external_mounts(). We can rely on find_ext_ns_id() which
does collect_mntinfo() on demand.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Tested-by: Tycho Andersen <tycho.andersen@canonical.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>