Re: [PATCH 11/16] io_uring: batch io_kiocb allocation

[Christoph Hellwig <hch@xxxxxx>]

> +	if (!state)
> +		req = kmem_cache_alloc(kiocb_cachep, GFP_KERNEL);

Just return an error here if kmem_cache_alloc fails.

> +	if (req)
> +		io_req_init(ctx, req);

Because all the other ones can't reached this with a NULL req.