skb_unclone_keeptruesize
return skb_unclone_keeptruesize(skb, GFP_ATOMIC);
if (skb_unclone_keeptruesize(skb, gfp))
if (skb_unclone_keeptruesize(skb, GFP_ATOMIC))
if (skb_unclone_keeptruesize(skb, GFP_ATOMIC)) {