[PATCH] add hlist_replace_rcu() (b88cb424) · Commits · e / devices / android_kernel_fairphone_FP5

include/linux/list.h

+25 −1

Original line number	Diff line number	Diff line
		@@ -202,12 +202,15 @@ static inline void list_del_rcu(struct list_head *entry)
		*
		* The old entry will be replaced with the new entry atomically.
		*/
		static inline void list_replace_rcu(struct list_head old, struct list_head new){
		static inline void list_replace_rcu(struct list_head *old,
		struct list_head *new)
		{
		new->next = old->next;
		new->prev = old->prev;
		smp_wmb();
		new->next->prev = new;
		new->prev->next = new;
		old->prev = LIST_POISON2;
		}

		/**
		@@ -578,6 +581,27 @@ static inline void hlist_del_init(struct hlist_node *n)
		}
		}

		/*
		* hlist_replace_rcu - replace old entry by new one
		* @old : the element to be replaced
		* @new : the new element to insert
		*
		* The old entry will be replaced with the new entry atomically.
		*/
		static inline void hlist_replace_rcu(struct hlist_node *old,
		struct hlist_node *new)
		{
		struct hlist_node *next = old->next;

		new->next = next;
		new->pprev = old->pprev;
		smp_wmb();
		if (next)
		new->next->pprev = &new->next;
		*new->pprev = new;
		old->pprev = LIST_POISON2;
		}

		static inline void hlist_add_head(struct hlist_node n, struct hlist_head h)
		{
		struct hlist_node *first = h->first;