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| author | Hao Xu <haoxu@linux.alibaba.com> | 2021-12-07 17:39:47 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-12-07 15:01:57 -0700 |
| commit | 24115c4e95e137b73954bbbd94354889552a4b08 (patch) | |
| tree | 4d95c9b1c0890a1f9e11258240c3d917465f9c24 /fs/io-wq.h | |
| parent | a90c8bf6590676035336ae98cc51bce1aeb96c33 (diff) | |
| download | lwn-24115c4e95e137b73954bbbd94354889552a4b08.tar.gz lwn-24115c4e95e137b73954bbbd94354889552a4b08.zip | |
io-wq: add helper to merge two wq_lists
add a helper to merge two wq_lists, it will be useful in the next
patches.
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Hao Xu <haoxu@linux.alibaba.com>
Link: https://lore.kernel.org/r/20211207093951.247840-2-haoxu@linux.alibaba.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io-wq.h')
| -rw-r--r-- | fs/io-wq.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/io-wq.h b/fs/io-wq.h index 41bf37674a49..3709b7c5ec98 100644 --- a/fs/io-wq.h +++ b/fs/io-wq.h @@ -52,6 +52,28 @@ static inline void wq_list_add_after(struct io_wq_work_node *node, list->last = node; } +/** + * wq_list_merge - merge the second list to the first one. + * @list0: the first list + * @list1: the second list + * Return the first node after mergence. + */ +static inline struct io_wq_work_node *wq_list_merge(struct io_wq_work_list *list0, + struct io_wq_work_list *list1) +{ + struct io_wq_work_node *ret; + + if (!list0->first) { + ret = list1->first; + } else { + ret = list0->first; + list0->last->next = list1->first; + } + INIT_WQ_LIST(list0); + INIT_WQ_LIST(list1); + return ret; +} + static inline void wq_list_add_tail(struct io_wq_work_node *node, struct io_wq_work_list *list) { |