Re: [PATCH v16 09/16] x86/sgx: Add basic EPC reclamation flow for cgroup

[Haitao Huang]

> +static struct sgx_cgroup *sgx_cgroup_next_descendant_pre(struct  
> sgx_cgroup *root,
> +							 struct sgx_cgroup *cg)
> +{
> +	struct cgroup_subsys_state *next;
> +
> +	rcu_read_lock();
> +	for (;;) {
> +		next = css_next_descendant_pre(&cg->cg->css, &root->cg->css);

I  messed it up in a last minute change and rebase. Above should be:

+	struct cgroup_subsys_state *next = &cg->cg->css;
+
+	rcu_read_lock();
+	for (;;) {
+		next = css_next_descendant_pre(next, &root->cg->css);

Fixed in a branch here:  
https://github.com/haitaohuang/linux/tree/sgx_cg_upstream_v16_plus
Will include in next version or update if needed.

> +		if (!next) {
> +			next = &root->cg->css;
> +			break;
> +		}
> +
> +		if (css_tryget(next))
> +			break;
> +	}
> +	rcu_read_unlock();
> +
> +	return sgx_cgroup_from_misc_cg(css_misc(next));
> +}
> +
BR
Haitao