IEEE802154_FC_VERSION_SHIFT 82 include/linux/ieee802154.h #define IEEE802154_FC_VERSION_MASK (3 << IEEE802154_FC_VERSION_SHIFT) IEEE802154_FC_VERSION_SHIFT 83 include/linux/ieee802154.h #define IEEE802154_FC_VERSION(x) ((x & IEEE802154_FC_VERSION_MASK) >> IEEE802154_FC_VERSION_SHIFT)