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

[Christoph Hellwig]

> +     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.