Re: [PATCH bpf-next v6 6/8] selftests/bpf: detach a struct_ops link from the subsystem managing it.

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

On 5/24/24 3:30 PM, Kui-Feng Lee wrote:
> @@ -832,11 +865,20 @@ static int bpf_dummy_reg(void *kdata, struct bpf_link *link)
>   	if (ops->test_2)
>   		ops->test_2(4, ops->data);
>   
> +	spin_lock(&detach_lock);
> +	if (!link_to_detach)
> +		link_to_detach = link;

bpf_testmod_ops is used in a few different tests now. Can you check if 
"./test_progs -j <num_of_parallel_workers>" will work considering link_to_detach 
here is the very first registered link.

> +	spin_unlock(&detach_lock);
> +
>   	return 0;
>   }