linux-kernel - Re: [PATCH -next] nfsd: remove set but not used variable 'len'

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Date:   Mon, 30 Sep 2019 12:37:20 -0400
From:   "J. Bruce Fields" <bfields@...ldses.org>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     chuck.lever@...cle.com, trondmy@...il.com,
        linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] nfsd: remove set but not used variable 'len'

Thanks, applying for 5.5.--b.

On Sat, Sep 28, 2019 at 12:21:56PM +0800, YueHaibing wrote:
> Fixes gcc '-Wunused-but-set-variable' warning:
> 
> fs/nfsd/nfs4xdr.c: In function nfsd4_encode_splice_read:
> fs/nfsd/nfs4xdr.c:3464:7: warning: variable len set but not used [-Wunused-but-set-variable]
> 
> It is not used since commit 83a63072c815 ("nfsd: fix nfs read eof detection")
> 
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
>  fs/nfsd/nfs4xdr.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
> index 533d0fc..1883370 100644
> --- a/fs/nfsd/nfs4xdr.c
> +++ b/fs/nfsd/nfs4xdr.c
> @@ -3461,7 +3461,6 @@ static __be32 nfsd4_encode_splice_read(
>  	struct xdr_stream *xdr = &resp->xdr;
>  	struct xdr_buf *buf = xdr->buf;
>  	u32 eof;
> -	long len;
>  	int space_left;
>  	__be32 nfserr;
>  	__be32 *p = xdr->p - 2;
> @@ -3470,7 +3469,6 @@ static __be32 nfsd4_encode_splice_read(
>  	if (xdr->end - xdr->p < 1)
>  		return nfserr_resource;
>  
> -	len = maxcount;
>  	nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
>  				  file, read->rd_offset, &maxcount, &eof);
>  	read->rd_length = maxcount;
> -- 
> 2.7.4
>