linux-kernel - Re: [PATCH 1/1 linux-next] nfs: kmap can't fail

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Date:   Tue, 25 Apr 2017 16:37:08 -0400
From:   Anna Schumaker <Anna.Schumaker@...app.com>
To:     Fabian Frederick <fabf@...net.be>,
        Trond Myklebust <trond.myklebust@...marydata.com>
CC:     <linux-nfs@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1 linux-next] nfs: kmap can't fail

Hi Fabian,

On 04/25/2017 02:10 PM, Fabian Frederick wrote:
> Remove NULL test on kmap()
> 
> Signed-off-by: Fabian Frederick <fabf@...net.be>
> ---
>  fs/nfs/dir.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
> index 3a188cb..f89e54c 100644
> --- a/fs/nfs/dir.c
> +++ b/fs/nfs/dir.c
> @@ -179,8 +179,6 @@ struct nfs_cache_array *nfs_readdir_get_array(struct page *page)
>  	if (page == NULL)
>  		return ERR_PTR(-EIO);
>  	ptr = kmap(page);
> -	if (ptr == NULL)
> -		return ERR_PTR(-ENOMEM);>  	return ptr;

While you're at it, can you remove the ptr variable entirely and change the code to "return kmap(page)" instead?

Thanks,
Anna

>  }
>  
>