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author | Antonio Borneo <borneo.antonio@gmail.com> | 2023-03-14 15:20:14 +0100 |
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committer | Antonio Borneo <borneo.antonio@gmail.com> | 2023-04-07 21:47:34 +0000 |
commit | c8de1b82ec7f74c0717bfa0094f5fb6b79fbbfaf (patch) | |
tree | b6238fc299ee1ee2cfff1bdc7705b9bee7331e61 | |
parent | 90ce9da644d751466d8dc451d7d2a043cdbf7d72 (diff) | |
download | riscv-openocd-c8de1b82ec7f74c0717bfa0094f5fb6b79fbbfaf.zip riscv-openocd-c8de1b82ec7f74c0717bfa0094f5fb6b79fbbfaf.tar.gz riscv-openocd-c8de1b82ec7f74c0717bfa0094f5fb6b79fbbfaf.tar.bz2 |
helper/list: re-align with Linux kernel 6.3-rc1
Minor changes due to kernel switch to 100 char/line.
Added four new functions.
Silent checkpatch; we don't want to diverge from Linux reference
code.
Checkpatch-ignore: MACRO_ARG_REUSE, UNNECESSARY_PARENTHESES
Checkpatch-ignore: MACRO_ARG_PRECEDENCE
Change-Id: I1d2ff25bf3bab8cd0f5c9be55c7501795490ea75
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7568
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
-rw-r--r-- | src/helper/list.h | 66 |
1 files changed, 58 insertions, 8 deletions
diff --git a/src/helper/list.h b/src/helper/list.h index 396ff06..c9de056 100644 --- a/src/helper/list.h +++ b/src/helper/list.h @@ -265,8 +265,7 @@ static inline void list_bulk_move_tail(struct list_head *head, * @param list the entry to test * @param head the head of the list */ -static inline int list_is_first(const struct list_head *list, - const struct list_head *head) +static inline int list_is_first(const struct list_head *list, const struct list_head *head) { return list->prev == head; } @@ -276,13 +275,22 @@ static inline int list_is_first(const struct list_head *list, * @param list the entry to test * @param head the head of the list */ -static inline int list_is_last(const struct list_head *list, - const struct list_head *head) +static inline int list_is_last(const struct list_head *list, const struct list_head *head) { return list->next == head; } /** + * list_is_head - tests whether @a list is the list @a head + * @param list the entry to test + * @param head the head of the list + */ +static inline int list_is_head(const struct list_head *list, const struct list_head *head) +{ + return list == head; +} + +/** * list_empty - tests whether a list is empty * @param head the list to test. */ @@ -400,10 +408,9 @@ static inline void list_cut_position(struct list_head *list, { if (list_empty(head)) return; - if (list_is_singular(head) && - (head->next != entry && head != entry)) + if (list_is_singular(head) && !list_is_head(entry, head) && (entry != head->next)) return; - if (entry == head) + if (list_is_head(entry, head)) INIT_LIST_HEAD(list); else __list_cut_position(list, head, entry); @@ -564,6 +571,19 @@ static inline void list_splice_tail_init(struct list_head *list, list_entry((pos)->member.next, typeof(*(pos)), member) /** + * list_next_entry_circular - get the next element in list + * @param pos the type * to cursor. + * @param head the list head to take the element from. + * @param member the name of the list_head within the struct. + * + * Wraparound if pos is the last element (return the first element). + * Note, that list is expected to be not empty. + */ +#define list_next_entry_circular(pos, head, member) \ + (list_is_last(&(pos)->member, head) ? \ + list_first_entry(head, typeof(*(pos)), member) : list_next_entry(pos, member)) + +/** * list_prev_entry - get the prev element in list * @param pos the type * to cursor * @param member the name of the list_head within the struct. @@ -572,12 +592,27 @@ static inline void list_splice_tail_init(struct list_head *list, list_entry((pos)->member.prev, typeof(*(pos)), member) /** + * list_prev_entry_circular - get the prev element in list + * @param pos the type * to cursor. + * @param head the list head to take the element from. + * @param member the name of the list_head within the struct. + * + * Wraparound if pos is the first element (return the last element). + * Note, that list is expected to be not empty. + */ +#define list_prev_entry_circular(pos, head, member) \ + (list_is_first(&(pos)->member, head) ? \ + list_last_entry(head, typeof(*(pos)), member) : list_prev_entry(pos, member)) + +/** * list_for_each - iterate over a list * @param pos the &struct list_head to use as a loop cursor. * @param head the head for your list. */ #define list_for_each(pos, head) \ - for (pos = (head)->next; pos != (head); pos = pos->next) + for (pos = (head)->next; !list_is_head(pos, (head)); pos = pos->next) + +/* Ignore kernel list_for_each_rcu() */ /** * list_for_each_continue - continue iteration over a list @@ -619,6 +654,21 @@ static inline void list_splice_tail_init(struct list_head *list, pos = n, n = pos->prev) /** + * list_count_nodes - count nodes in the list + * @param head the head for your list. + */ +static inline size_t list_count_nodes(struct list_head *head) +{ + struct list_head *pos; + size_t count = 0; + + list_for_each(pos, head) + count++; + + return count; +} + +/** * list_entry_is_head - test if the entry points to the head of the list * @param pos the type * to cursor * @param head the head for your list. |