[PATCH v2 08/10] mm, cma: clean-up cma allocation error path

[Zhang Yanfei]

On 06/12/2014 11:21 AM, Joonsoo Kim wrote:
> We can remove one call sites for clear_cma_bitmap() if we first
> call it before checking error number.
> 
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim at lge.com>

Reviewed-by: Zhang Yanfei <zhangyanfei at cn.fujitsu.com>

> 
> diff --git a/mm/cma.c b/mm/cma.c
> index 1e1b017..01a0713 100644
> --- a/mm/cma.c
> +++ b/mm/cma.c
> @@ -282,11 +282,12 @@ struct page *cma_alloc(struct cma *cma, int count, unsigned int align)
>  		if (ret == 0) {
>  			page = pfn_to_page(pfn);
>  			break;
> -		} else if (ret != -EBUSY) {
> -			clear_cma_bitmap(cma, pfn, count);
> -			break;
>  		}
> +
>  		clear_cma_bitmap(cma, pfn, count);
> +		if (ret != -EBUSY)
> +			break;
> +
>  		pr_debug("%s(): memory range at %p is busy, retrying\n",
>  			 __func__, pfn_to_page(pfn));
>  		/* try again with a bit different memory target */
> 


-- 
Thanks.
Zhang Yanfei