linux-kernel - Re: [PATCH] mm/huge_memory.c: Remove unused variable unmap

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Message-ID: <39cd7470-2c45-ba3a-166a-b7285c7d7282@redhat.com>
Date:   Tue, 25 May 2021 10:02:30 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Souptick Joarder <jrdr.linux@...il.com>, akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] mm/huge_memory.c: Remove unused variable unmap_success

On 18.05.21 22:09, Souptick Joarder wrote:
> Kernel test robot throws below warning ->
> 
>     mm/huge_memory.c: In function 'unmap_page':
>>> mm/huge_memory.c:2345:7: warning: variable 'unmap_success' set but not used [-Wunused-but-set-variable]
>      2345 |  bool unmap_success;
>           |       ^~~~~~~~~~~~~
> 
> Remove the unused variable unmap_success.
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
> ---
>   mm/huge_memory.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/mm/huge_memory.c b/mm/huge_memory.c
> index 52ca04b905cf..ff79a12993c9 100644
> --- a/mm/huge_memory.c
> +++ b/mm/huge_memory.c
> @@ -2342,14 +2342,13 @@ static void unmap_page(struct page *page)
>   {
>   	enum ttu_flags ttu_flags = TTU_IGNORE_MLOCK |
>   		TTU_RMAP_LOCKED | TTU_SPLIT_HUGE_PMD;
> -	bool unmap_success;
>   
>   	VM_BUG_ON_PAGE(!PageHead(page), page);
>   
>   	if (PageAnon(page))
>   		ttu_flags |= TTU_SPLIT_FREEZE;
>   
> -	unmap_success = try_to_unmap(page, ttu_flags);
> +	try_to_unmap(page, ttu_flags);
>   }
>   
>   static void remap_page(struct page *page, unsigned int nr)
> 

Reviewed-by: David Hildenbrand <david@...hat.com>

-- 
Thanks,

David / dhildenb