The typedef of "__virtio16" is introduced into Linux kernel in v3.19. To prevent build error on old kernel, this patch replaces the "__virtio" usage with "uint16_t". Fixes: d7fe5a2861e7 ("net/ifc: support live migration") Signed-off-by: Xiao Wang <xiao.w.wang@intel.com> Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>