diff options
| -rw-r--r-- | include/linux/list.h | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/include/linux/list.h b/include/linux/list.h index fbfca73355a3..8e3388284530 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -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; |