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kconfig: import list_move(_tail) and list_for_each_entry_reverse macros

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Import more macros from include/linux/list.h.

These will be used in the next commit.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Masahiro Yamada 2024-06-18 19:35:20 +09:00
parent 17c31aded9
commit ee29e6204c
1 changed files with 53 additions and 0 deletions
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53
scripts/kconfig/list.h
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@ -127,6 +127,29 @@ static inline void list_del(struct list_head *entry)
entry->prev = LIST_POISON2;
}
/**
* list_move - delete from one list and add as another's head
* @list: the entry to move
* @head: the head that will precede our entry
*/
static inline void list_move(struct list_head *list, struct list_head *head)
{
__list_del_entry(list);
list_add(list, head);
}
/**
* list_move_tail - delete from one list and add as another's tail
* @list: the entry to move
* @head: the head that will follow our entry
*/
static inline void list_move_tail(struct list_head *list,
struct list_head *head)
{
__list_del_entry(list);
list_add_tail(list, head);
}
/**
* list_is_head - tests whether @list is the list @head
* @list: the entry to test
@ -166,6 +189,17 @@ static inline int list_empty(const struct list_head *head)
#define list_first_entry(ptr, type, member) \
list_entry((ptr)->next, type, member)
/**
* list_last_entry - get the last element from a list
* @ptr: the list head to take the element from.
* @type: the type of the struct this is embedded in.
* @member: the name of the list_head within the struct.
*
* Note, that list is expected to be not empty.
*/
#define list_last_entry(ptr, type, member) \
list_entry((ptr)->prev, type, member)
/**
* list_next_entry - get the next element in list
* @pos: the type * to cursor
@ -174,6 +208,14 @@ static inline int list_empty(const struct list_head *head)
#define list_next_entry(pos, member) \
list_entry((pos)->member.next, typeof(*(pos)), member)
/**
* list_prev_entry - get the prev element in list
* @pos: the type * to cursor
* @member: the name of the list_head within the struct.
*/
#define list_prev_entry(pos, member) \
list_entry((pos)->member.prev, typeof(*(pos)), member)
/**
* list_entry_is_head - test if the entry points to the head of the list
* @pos: the type * to cursor
@ -194,6 +236,17 @@ static inline int list_empty(const struct list_head *head)
!list_entry_is_head(pos, head, member); \
pos = list_next_entry(pos, member))
/**
* list_for_each_entry_reverse - iterate backwards over list of given type.
* @pos: the type * to use as a loop cursor.
* @head: the head for your list.
* @member: the name of the list_head within the struct.
*/
#define list_for_each_entry_reverse(pos, head, member) \
for (pos = list_last_entry(head, typeof(*pos), member); \
!list_entry_is_head(pos, head, member); \
pos = list_prev_entry(pos, member))
/**
* list_for_each_entry_safe - iterate over list of given type. Safe against removal of list entry
* @pos: the type * to use as a loop cursor.