Re: [PATCH 06/12] cgroups: Add res counter common ancestorsearching

[Andrew Morton]

On Tue,  6 Sep 2011 02:13:00 +0200
Frederic Weisbecker <fweisbec@xxxxxxxxx> wrote:

> +struct res_counter *
> +res_counter_common_ancestor(struct res_counter *r1, struct res_counter *r2)
> +{
> +	struct res_counter *iter;
> +
> +	while (r1) {
> +		iter = r2;
> +		while (iter) {
> +			if (iter == r1)
> +				return iter;
> +			iter = iter->parent;
> +		}
> +
> +		r1 = r1->parent;
> +	}
> +
> +	return NULL;
> +}

cgroup_mutex, one assumes?
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