linux-kernel - Re: [PATCH -next] mm/hmm: remove set but not used variable 'devmem'

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Date:   Sun, 2 Dec 2018 19:48:49 -0500
From:   Jerome Glisse <jglisse@...hat.com>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     akpm@...ux-foundation.org, sfr@...b.auug.org.au,
        dan.j.williams@...el.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH -next] mm/hmm: remove set but not used variable 'devmem'

On Sat, Dec 01, 2018 at 02:06:11AM +0000, YueHaibing wrote:
> Fixes gcc '-Wunused-but-set-variable' warning:
> 
> mm/hmm.c: In function 'hmm_devmem_ref_kill':
> mm/hmm.c:995:21: warning:
>  variable 'devmem' set but not used [-Wunused-but-set-variable]
> 
> It not used any more since commit 35d39f953d4e ("mm, hmm: replace
> hmm_devmem_pages_create() with devm_memremap_pages()")
> 
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>

Reviewed-by: Jérôme Glisse <jglisse@...hat.com>

> ---
>  mm/hmm.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/mm/hmm.c b/mm/hmm.c
> index 50fbaf8..361f370 100644
> --- a/mm/hmm.c
> +++ b/mm/hmm.c
> @@ -992,9 +992,6 @@ static void hmm_devmem_ref_exit(void *data)
>  
>  static void hmm_devmem_ref_kill(struct percpu_ref *ref)
>  {
> -	struct hmm_devmem *devmem;
> -
> -	devmem = container_of(ref, struct hmm_devmem, ref);
>  	percpu_ref_kill(ref);
>  }
> 
> 
>