Re: [PATCH 08/23] cgroup: pass around cgroup_subsys_state insteadof cgroup in subsystem methods

[Li Zefan]

> @@ -4199,12 +4208,13 @@ static void init_cgroup_css(struct cgroup_subsys_state *css,
>  /* invoke ->css_online() on a new CSS and mark it online if successful */
>  static int online_css(struct cgroup_subsys *ss, struct cgroup *cgrp)
>  {
> +	struct cgroup_subsys_state *css = cgrp->subsys[ss->subsys_id];
>  	int ret = 0;
>  
>  	lockdep_assert_held(&cgroup_mutex);
>  
>  	if (ss->css_online)
> -		ret = ss->css_online(cgrp);
> +		ret = ss->css_online(css);
>  	if (!ret)
>  		cgrp->subsys[ss->subsys_id]->flags |= CSS_ONLINE;

Then this can be changed to css->flags |= CSS_ONLINE.

>  	return ret;

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