514 	struct hlist_node *next, **pprev;  member
520 #define INIT_HLIST_NODE(ptr) ((ptr)->next = NULL, (ptr)->pprev = NULL)
524 	return !h->pprev;  in hlist_unhashed()
535 	struct hlist_node **pprev = n->pprev;  in __hlist_del()  local
536 	*pprev = next;  in __hlist_del()
538 		next->pprev = pprev;  in __hlist_del()
545 	n->pprev = LIST_POISON2;  in hlist_del()
570 	n->pprev = LIST_POISON2;  in hlist_del_rcu()
575 	if (n->pprev)  {  in hlist_del_init()
588 		first->pprev = &n->next;  in hlist_add_head()
590 	n->pprev = &h->first;  in hlist_add_head()
618 	n->pprev = &h->first;  in hlist_add_head_rcu()
621 		first->pprev = &n->next;  in hlist_add_head_rcu()
629 	n->pprev = next->pprev;  in hlist_add_before()
631 	next->pprev = &n->next;  in hlist_add_before()
632 	*(n->pprev) = n;  in hlist_add_before()
640 	next->pprev = &n->next;  in hlist_add_after()
643 		next->next->pprev  = &next->next;  in hlist_add_after()