diff options
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 */ |