42     struct hlist_node *next, **pprev;  member
64     h->pprev = NULL;  in INIT_HLIST_NODE()
69     return !h->pprev;  in hlist_unhashed()
80     struct hlist_node **pprev = n->pprev;  in __hlist_del()  local
82     WRITE_ONCE(*pprev, next);  in __hlist_del()
84         next->pprev = pprev;  in __hlist_del()
91     n->pprev = (struct hlist_node**)LIST_POISON2;  in hlist_del()
107         first->pprev = &n->next;  in hlist_add_head()
109     n->pprev = &h->first;  in hlist_add_head()
114     n->pprev = next->pprev;  in hlist_add_before()
116     next->pprev = &n->next;  in hlist_add_before()
117     WRITE_ONCE(*(n->pprev), n);  in hlist_add_before()
124     n->pprev = &prev->next;  in hlist_add_behind()
127         n->next->pprev  = &n->next;  in hlist_add_behind()
132     n->pprev = &n->next;  in hlist_add_fake()
137     return h->pprev == &h->next;  in hlist_fake()
143     return !n->next && n->pprev == &h->first;  in hlist_is_singular_node()
151         _new->first->pprev = &_new->first;  in hlist_move_list()