Re: [PATCH] sched: fix the wrong mask_len

[KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>]

> If the NR_CPUS isn't a multiple of 32, we get a truncated string of sched
> domains by catting /proc/schedstat. This is caused by the wrong mask_len.
> 
> This patch fix it.
> 
> Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
> 
> ---
>  kernel/sched_stats.h |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/kernel/sched_stats.h b/kernel/sched_stats.h
> index 8385d43..81365b3 100644
> --- a/kernel/sched_stats.h
> +++ b/kernel/sched_stats.h
> @@ -9,7 +9,7 @@
>  static int show_schedstat(struct seq_file *seq, void *v)
>  {
>  	int cpu;
> -	int mask_len = NR_CPUS/32 * 9;
> +	int mask_len = (NR_CPUS/32 + 1) * 9;
>  	char *mask_str = kmalloc(mask_len, GFP_KERNEL);
>  

DIV_ROUND_UP() is better?