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| author | Jingbo Xu <jefflexu@linux.alibaba.com> | 2023-09-13 20:02:56 +0800 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2023-09-14 17:45:11 +0800 |
| commit | 18ad066c56fc046a75d4263360688286117fbe38 (patch) | |
| tree | 838eab1e7e19dde1a16b0256e05185982945c306 | |
| parent | d59a8ea390758feb17f31639ad3ca72fcdc54e49 (diff) | |
| download | erofs-utils-18ad066c56fc046a75d4263360688286117fbe38.tar.gz | |
erofs-utils: lib: add list_splice_tail() helper
Add list_splice_tail() helper.
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230913120304.15741-2-jefflexu@linux.alibaba.com
| -rw-r--r-- | include/erofs/list.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/erofs/list.h b/include/erofs/list.h index 3f5da1a..d7a9fee 100644 --- a/include/erofs/list.h +++ b/include/erofs/list.h @@ -70,6 +70,26 @@ static inline int list_empty(struct list_head *head) return head->next == head; } +static inline void __list_splice(struct list_head *list, + struct list_head *prev, struct list_head *next) +{ + struct list_head *first = list->next; + struct list_head *last = list->prev; + + first->prev = prev; + prev->next = first; + + last->next = next; + next->prev = last; +} + +static inline void list_splice_tail(struct list_head *list, + struct list_head *head) +{ + if (!list_empty(list)) + __list_splice(list, head->prev, head); +} + #define list_entry(ptr, type, member) container_of(ptr, type, member) #define list_first_entry(ptr, type, member) \ |