#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
/* Before v2.6.29, a NLA_NESTED attribute, if it was present, was not allowed
* to be empty. However, OVS depends on the ability to accept empty
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
/* Before v2.6.29, a NLA_NESTED attribute, if it was present, was not allowed
* to be empty. However, OVS depends on the ability to accept empty