Re: [PATCH 2/2] selftests/mm: fix ksm NUMA merge test for systems with memoryless NUMA nodes

[David Hildenbrand (Arm)]

>  
> +static int count_mem_nodes(void)
> +{
> +	int node, count = 0;
> +
> +	for (node = 0; node <= numa_max_node(); node++) {
> +		if (numa_node_size(node, NULL) > 0)
> +			count++;
> +	}
> +
> +	return count;
> +}
> +

Can we instead build upon our existing helpers get_first_mem_node() +
get_next_mem_node() ?