static ssize_t cpu_rt_runtime_write(struct cgroup *cgrp, struct cftype *cft,
				struct file *file,
				const char __user *userbuf,
				size_t nbytes, loff_t *unused_ppos)
{
	char buffer[64];
	int retval = 0;
	s64 val;
	char *end;

	if (!nbytes)
		return -EINVAL;
	if (nbytes >= sizeof(buffer))
		return -E2BIG;
	if (copy_from_user(buffer, userbuf, nbytes))
		return -EFAULT;

	buffer[nbytes] = 0;     /* nul-terminate */

	/* strip newline if necessary */
	if (nbytes && (buffer[nbytes-1] == '\n'))
		buffer[nbytes-1] = 0;
	val = simple_strtoll(buffer, &end, 0);
	if (*end)
		return -EINVAL;

	/* Pass to subsystem */
	retval = sched_group_set_rt_runtime(cgroup_tg(cgrp), val);
	if (!retval)
		retval = nbytes;
	return retval;
}
static ssize_t cpu_rt_runtime_write(struct cgroup *cgrp, struct cftype *cft,
				struct file *file,
				const char __user *userbuf,
				size_t nbytes, loff_t *unused_ppos)
{
	char buffer[64];
	int retval = 0;
	s64 val;
	char *end;

	if (!nbytes)
		return -EINVAL;
	if (nbytes >= sizeof(buffer))
		return -E2BIG;
	if (copy_from_user(buffer, userbuf, nbytes))
		return -EFAULT;

	buffer[nbytes] = 0;      

	 
	if (nbytes && (buffer[nbytes-1] == '\n'))
		buffer[nbytes-1] = 0;
	val = simple_strtoll(buffer, &end, 0);
	if (*end)
		return -EINVAL;

	 
	retval = sched_group_set_rt_runtime(cgroup_tg(cgrp), val);
	if (!retval)
		retval = nbytes;
	return retval;
}