There was API change in linux kernel 3.2 -> 3.3 transition

 | commit c8991362a0d3cf317dfbfb6cb946607870654e6d
Reported-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>