| Message ID | 20221114112842.38565-1-andriy.shevchenko@linux.intel.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v1,1/4] list: Introduce list_count() to count existing nodes | expand |
diff --git a/include/linux/list.h b/include/linux/list.h index 61762054b4be..098eccf8c1b6 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -655,6 +655,19 @@ static inline void list_splice_tail_init(struct list_head *list, !list_is_head(pos, (head)); \ pos = n, n = pos->prev) +/** + * list_count - count nodes in the list + * @head: the head for your list. + */ +#define list_count(head) \ +({ \ + struct list_head *__tmp; \ + size_t __i = 0; \ + list_for_each(__tmp, head) \ + __i++; \ + __i; \ +}) + /** * list_entry_is_head - test if the entry points to the head of the list * @pos: the type * to cursor
Some of the existing users, and definitely will be new ones, want to count existing nodes in the list. Provide a generic API for that. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- include/linux/list.h | 13 +++++++++++++ 1 file changed, 13 insertions(+)