Hi Kanchan,

+static void uring_cmd_work(struct callback_head *cb)
+{
+	struct io_kiocb *req = container_of(cb, struct io_kiocb, task_work);
+	struct io_uring_cmd *cmd = &req->uring_cmd;
+
+	req->driver_cb(cmd);
+}
+int uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
+			void (*driver_cb)(struct io_uring_cmd *))
+{
+	int ret;
+	struct io_kiocb *req = container_of(ioucmd, struct io_kiocb, uring_cmd);
+
+	req->driver_cb = driver_cb;
+	req->task_work.func = uring_cmd_work;
+	ret = io_req_task_work_add(req);
+	if (unlikely(ret)) {
+		req->result = -ECANCELED;
+		percpu_ref_get(&req->ctx->refs);
+		io_req_task_work_add_fallback(req, io_req_task_cancel);
+	}
+	return ret;
+}
+EXPORT_SYMBOL(uring_cmd_complete_in_task);

I think this should be have an io_ prefix:
io_uring_cmd_complete_in_task()

I'll let Jens comment if this is needed at all...

metze

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