diff options
| author | Pavel Begunkov <asml.silence@gmail.com> | 2023-04-06 14:20:11 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-04-06 16:23:28 -0600 |
| commit | 5150940079a3ce94d7474f6f5b0d6276569dc1de (patch) | |
| tree | 9f5fdfd34494e5be021c6b8ed9db79095e99c364 /io_uring | |
| parent | 8501fe70ae9855076ffb03a3670e02a7b3437304 (diff) | |
| download | linux-5150940079a3ce94d7474f6f5b0d6276569dc1de.tar.gz | |
io_uring: inline llist_add()
We'll need to grab some information from the previous request in the tw
list, inline llist_add(), it'll be used in the following patch.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/f0165493af7b379943c792114b972f331e7d7d10.1680782017.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/io_uring.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 6f175fe682e4..786ecfa01c54 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -1303,8 +1303,15 @@ static __cold void io_fallback_tw(struct io_uring_task *tctx) static void io_req_local_work_add(struct io_kiocb *req) { struct io_ring_ctx *ctx = req->ctx; + struct llist_node *first; - if (!llist_add(&req->io_task_work.node, &ctx->work_llist)) + first = READ_ONCE(ctx->work_llist.first); + do { + req->io_task_work.node.next = first; + } while (!try_cmpxchg(&ctx->work_llist.first, &first, + &req->io_task_work.node)); + + if (first) return; /* needed for the following wake up */ |