diff options
Diffstat (limited to 'include/linux/seq_file.h')
| -rw-r--r-- | include/linux/seq_file.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h index 03c0232b416..34f8680a7b9 100644 --- a/include/linux/seq_file.h +++ b/include/linux/seq_file.h @@ -153,4 +153,25 @@ extern struct hlist_node *seq_hlist_start_head_rcu(struct hlist_head *head, extern struct hlist_node *seq_hlist_next_rcu(void *v, struct hlist_head *head, loff_t *ppos); + +/* + * Helpers for iteration over a list sorted by ascending head pointer address. + * To be used in contexts where preemption cannot be disabled to insure to + * continue iteration on a modified list starting at the same location where it + * stopped, or at a following location. It insures that the lost information + * will only be in elements added/removed from the list between iterations. + * void *pos is only used to get the next list element and may not be a valid + * list_head anymore when given to seq_sorted_list_start() or + * seq_sorted_list_start_head(). + */ +extern struct list_head *seq_sorted_list_start(struct list_head *head, + loff_t *ppos); +extern struct list_head *seq_sorted_list_start_head(struct list_head *head, + loff_t *ppos); +/* + * next must be called with an existing p node + */ +extern struct list_head *seq_sorted_list_next(void *p, struct list_head *head, + loff_t *ppos); + #endif |