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Commit d219dce7 authored by Pablo Neira Ayuso's avatar Pablo Neira Ayuso Committed by Patrick McHardy
Browse files

list_nulls: add hlist_nulls_add_head and hlist_nulls_del 



This patch adds the hlist_nulls_add_head() function which is
based on hlist_nulls_add_head_rcu() but without the use of
rcu_assign_pointer(). It also adds hlist_nulls_del which is
exactly the same like hlist_nulls_del_rcu().

Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
Acked-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
parent 9858a3ae

include/linux/list_nulls.h

+18 −0
Original line number Diff line number Diff line
@@ -56,6 +56,18 @@ static inline int hlist_nulls_empty(const struct hlist_nulls_head *h) 
	return is_a_nulls(h->first);

}



static inline void hlist_nulls_add_head(struct hlist_nulls_node *n,

					struct hlist_nulls_head *h)

{

	struct hlist_nulls_node *first = h->first;



	n->next = first;

	n->pprev = &h->first;

	h->first = n;

	if (!is_a_nulls(first))

		first->pprev = &n->next;

}



static inline void __hlist_nulls_del(struct hlist_nulls_node *n)

{

	struct hlist_nulls_node *next = n->next;
@@ -65,6 +77,12 @@ static inline void __hlist_nulls_del(struct hlist_nulls_node *n) 
		next->pprev = pprev;

}



static inline void hlist_nulls_del(struct hlist_nulls_node *n)

{

	__hlist_nulls_del(n);

	n->pprev = LIST_POISON2;

}



/**

 * hlist_nulls_for_each_entry	- iterate over list of given type

 * @tpos:	the type * to use as a loop cursor.