Re: [PATCH v2 4/6] mm/page_owner: add missing newline to count_threshold format string

["Vlastimil Babka (SUSE)" <vbabka@kernel.org>]

On 6/26/26 04:45, Ye Liu wrote:
> The DEFINE_SIMPLE_ATTRIBUTE format string for page_owner_threshold_fops
> is missing a trailing \n.  simple_attr_read() uses scnprintf() with the
> format string, which does not append a newline, so reading
> /sys/kernel/debug/page_owner_stacks/count_threshold produces output
> without a terminating newline.  Add the missing \n to match the
> standard debugfs attribute convention.
> 
> Signed-off-by: Ye Liu <ye.liu@linux.dev>

Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>

> ---
>  mm/page_owner.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/page_owner.c b/mm/page_owner.c
> index 5d8773c90cd9..958151ccb587 100644
> --- a/mm/page_owner.c
> +++ b/mm/page_owner.c
> @@ -981,7 +981,7 @@ static int page_owner_threshold_set(void *data, u64 val)
>  }
>  
>  DEFINE_SIMPLE_ATTRIBUTE(page_owner_threshold_fops, &page_owner_threshold_get,
> -			&page_owner_threshold_set, "%llu");
> +			&page_owner_threshold_set, "%llu\n");
>  
>  
>  static int __init pageowner_init(void)