[RFC PATCH v3 1/3] io_uring: add helper for uring_cmd completion in submitter-task

[Stefan Metzmacher]

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