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scripts: import more list macros
Import list_is_first, list_is_last, list_replace, and list_replace_init. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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@ -127,6 +127,36 @@ static inline void list_del(struct list_head *entry)
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entry->prev = LIST_POISON2;
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}
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/**
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* list_replace - replace old entry by new one
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* @old : the element to be replaced
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* @new : the new element to insert
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*
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* If @old was empty, it will be overwritten.
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*/
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static inline void list_replace(struct list_head *old,
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struct list_head *new)
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{
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new->next = old->next;
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new->next->prev = new;
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new->prev = old->prev;
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new->prev->next = new;
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}
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/**
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* list_replace_init - replace old entry by new one and initialize the old one
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* @old : the element to be replaced
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* @new : the new element to insert
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*
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* If @old was empty, it will be overwritten.
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*/
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static inline void list_replace_init(struct list_head *old,
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struct list_head *new)
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{
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list_replace(old, new);
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INIT_LIST_HEAD(old);
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}
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/**
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* list_move - delete from one list and add as another's head
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* @list: the entry to move
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@ -150,6 +180,26 @@ static inline void list_move_tail(struct list_head *list,
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list_add_tail(list, head);
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}
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/**
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* list_is_first -- tests whether @list is the first entry in list @head
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* @list: the entry to test
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* @head: the head of the list
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*/
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static inline int list_is_first(const struct list_head *list, const struct list_head *head)
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{
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return list->prev == head;
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}
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/**
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* list_is_last - tests whether @list is the last entry in list @head
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* @list: the entry to test
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* @head: the head of the list
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*/
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static inline int list_is_last(const struct list_head *list, const struct list_head *head)
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{
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return list->next == head;
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}
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/**
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* list_is_head - tests whether @list is the list @head
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* @list: the entry to test
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