Re: [PATCH 5/9] mm, hugetlb: remove redundant list_empty check ingather_surplus_pages()

[Michal Hocko]

On Mon 15-07-13 18:52:43, Joonsoo Kim wrote:
> If list is empty, list_for_each_entry_safe() doesn't do anything.
> So, this check is redundant. Remove it.
> 
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>

Acked-by: Michal Hocko <mhocko@xxxxxxx>

> 
> diff --git a/mm/hugetlb.c b/mm/hugetlb.c
> index a838e6b..d4a1695 100644
> --- a/mm/hugetlb.c
> +++ b/mm/hugetlb.c
> @@ -1019,10 +1019,8 @@ free:
>  	spin_unlock(&hugetlb_lock);
>  
>  	/* Free unnecessary surplus pages to the buddy allocator */
> -	if (!list_empty(&surplus_list)) {
> -		list_for_each_entry_safe(page, tmp, &surplus_list, lru) {
> -			put_page(page);
> -		}
> +	list_for_each_entry_safe(page, tmp, &surplus_list, lru) {
> +		put_page(page);
>  	}
>  	spin_lock(&hugetlb_lock);
>  
> -- 
> 1.7.9.5
> 

-- 
Michal Hocko
SUSE Labs
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