enc_tailroom 1953 net/mac80211/tx.c bool enc_tailroom; enc_tailroom 1957 net/mac80211/tx.c enc_tailroom = may_encrypt && enc_tailroom 1961 net/mac80211/tx.c if (enc_tailroom) { enc_tailroom 1969 net/mac80211/tx.c !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom))