SKB_DATAREF_SHIFT 171 include/linux/skbuff.h #define SKB_DATAREF_MASK ((1 << SKB_DATAREF_SHIFT) - 1) SKB_DATAREF_SHIFT 555 include/linux/skbuff.h dataref = (dataref & SKB_DATAREF_MASK) - (dataref >> SKB_DATAREF_SHIFT); SKB_DATAREF_SHIFT 571 include/linux/skbuff.h atomic_add(1 << SKB_DATAREF_SHIFT, &skb_shinfo(skb)->dataref); SKB_DATAREF_SHIFT 337 net/core/skbuff.c !atomic_sub_return(skb->nohdr ? (1 << SKB_DATAREF_SHIFT) + 1 : 1,