841 	h->pprev = NULL;  in INIT_HLIST_NODE()
854 	return !h->pprev;  in hlist_unhashed()
867 	return !READ_ONCE(h->pprev);  in hlist_unhashed_lockless()
882 	struct hlist_node **pprev = n->pprev;  in __hlist_del()  local
884 	WRITE_ONCE(*pprev, next);  in __hlist_del()
886 		WRITE_ONCE(next->pprev, pprev);  in __hlist_del()
900 	n->pprev = LIST_POISON2;  in hlist_del()
930 		WRITE_ONCE(first->pprev, &n->next);  in hlist_add_head()
932 	WRITE_ONCE(n->pprev, &h->first);  in hlist_add_head()
943 	WRITE_ONCE(n->pprev, next->pprev);  in hlist_add_before()
945 	WRITE_ONCE(next->pprev, &n->next);  in hlist_add_before()
946 	WRITE_ONCE(*(n->pprev), n);  in hlist_add_before()
959 	WRITE_ONCE(n->pprev, &prev->next);  in hlist_add_behind()
962 		WRITE_ONCE(n->next->pprev, &n->next);  in hlist_add_behind()
975 	n->pprev = &n->next;  in hlist_add_fake()
984 	return h->pprev == &h->next;  in hlist_fake()
998 	return !n->next && n->pprev == &h->first;  in hlist_is_singular_node()
1014 		new->first->pprev = &new->first;  in hlist_move_list()