linux-kernel - Re: [PATCH 1/2] staging: android: ion: Remove dead code in ion_page_pool

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Message-ID: <e20bda6d-9132-57d7-e6d5-638b03efc97d@huawei.com>
Date:   Mon, 12 Feb 2018 19:40:58 +0800
From:   Yisheng Xie <xieyisheng1@...wei.com>
To:     <gregkh@...uxfoundation.org>, <labbott@...hat.com>
CC:     <devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] staging: android: ion: Remove dead code in
 ion_page_pool_free

Hi Greg,

JFYI, I have rebase this patchset to v4.15-rc1.[1]

[1] https://lkml.org/lkml/2018/2/12/204

Thanks
Yisheng

On 2018/2/5 11:26, Yisheng Xie wrote:
> ion_page_pool_add will always return 0, however ion_page_pool_free will
> call ion_page_pool_free_pages when ion_page_pool_add's return value is
> not 0, so it is a dead code which can be removed.
> 
> Signed-off-by: Yisheng Xie <xieyisheng1@...wei.com>
> ---
>  drivers/staging/android/ion/ion_page_pool.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/drivers/staging/android/ion/ion_page_pool.c b/drivers/staging/android/ion/ion_page_pool.c
> index 4452e28..150626f 100644
> --- a/drivers/staging/android/ion/ion_page_pool.c
> +++ b/drivers/staging/android/ion/ion_page_pool.c
> @@ -79,13 +79,9 @@ struct page *ion_page_pool_alloc(struct ion_page_pool *pool)
>  
>  void ion_page_pool_free(struct ion_page_pool *pool, struct page *page)
>  {
> -	int ret;
> -
>  	BUG_ON(pool->order != compound_order(page));
>  
> -	ret = ion_page_pool_add(pool, page);
> -	if (ret)
> -		ion_page_pool_free_pages(pool, page);
> +	ion_page_pool_add(pool, page);
>  }
>  
>  static int ion_page_pool_total(struct ion_page_pool *pool, bool high)
>