Re: [PATCH bpf-next v3 3/7] bpf: support epoll from bpf struct_ops links.

[Martin KaFai Lau <martin.lau@xxxxxxxxx>]

On 5/9/24 5:29 PM, Kui-Feng Lee wrote:
> +static __poll_t bpf_struct_ops_map_link_poll(struct file *file,
> +					     struct poll_table_struct *pts)
> +{
> +	struct bpf_struct_ops_link *st_link = file->private_data;
> +
> +	poll_wait(file, &st_link->wait_hup, pts);
> +
> +	return (st_link->map) ? 0 : EPOLLHUP;

nit. It should need a rcu_access_pointer(st_link->map).