[PATCH 4/9] [RFC] Allow cgroup hierarchies to be created with no bound subsystems

[Li Zefan]

> +#define MAX_TASKS_SHOWN_PER_CSS 25
> +static int cgroup_css_links_read(struct cgroup *cont,
> +				 struct cftype *cft,
> +				 struct seq_file *seq)
> +{
> +	struct cg_cgroup_link *link, *saved_link;

need a newline

> +	write_lock_irq(&css_set_lock);

can be read_lock(&css_set_lock);

> +	list_for_each_entry_safe(link, saved_link, &cont->css_sets,

can be list_for_each_entry()

> +				 cgrp_link_list) {
> +		struct css_set *cg = link->cg;
> +		struct task_struct *task, *saved_task;
> +		int count = 0;
> +		seq_printf(seq, "css_set %p\n", cg);
> +		list_for_each_entry_safe(task, saved_task, &cg->tasks,

ditto

> +					 cg_list) {
> +			if (count++ > MAX_TASKS_SHOWN_PER_CSS) {
> +				seq_puts(seq, "  ...\n");
> +				break;
> +			} else {
> +				seq_printf(seq, "  task %d\n",
> +					   task_pid_vnr(task));
> +			}
> +		}
> +	}
> +	write_unlock_irq(&css_set_lock);
> +	return 0;
> +}