netdev - Re: [PATCH net-next] net: socionext: remove set but not used variable 'pkts'

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Date:   Wed, 03 Jul 2019 11:30:05 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     yuehaibing@...wei.com
Cc:     jaswinder.singh@...aro.org, ast@...nel.org,
        ilias.apalodimas@...aro.org, daniel@...earbox.net,
        jakub.kicinski@...ronome.com, hawk@...nel.org,
        netdev@...r.kernel.org, xdp-newbies@...r.kernel.org,
        bpf@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH net-next] net: socionext: remove set but not used
 variable 'pkts'

From: YueHaibing <yuehaibing@...wei.com>
Date: Wed, 3 Jul 2019 02:42:13 +0000

> Fixes gcc '-Wunused-but-set-variable' warning:
> 
> drivers/net/ethernet/socionext/netsec.c: In function 'netsec_clean_tx_dring':
> drivers/net/ethernet/socionext/netsec.c:637:15: warning:
>  variable 'pkts' set but not used [-Wunused-but-set-variable]
> 
> It is not used since commit ba2b232108d3 ("net: netsec: add XDP support")
> 
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
>  drivers/net/ethernet/socionext/netsec.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/socionext/netsec.c b/drivers/net/ethernet/socionext/netsec.c
> index 5544a722543f..015d1ec5436a 100644
> --- a/drivers/net/ethernet/socionext/netsec.c
> +++ b/drivers/net/ethernet/socionext/netsec.c
> @@ -634,7 +634,7 @@ static void netsec_set_rx_de(struct netsec_priv *priv,
>  static bool netsec_clean_tx_dring(struct netsec_priv *priv)
>  {
>  	struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_TX];
> -	unsigned int pkts, bytes;
> +	unsigned int bytes;
>  	struct netsec_de *entry;
>  	int tail = dring->tail;
>  	int cnt = 0;

This breaks the reverse christmas-tree ordering of the local variables in this
function.  Please move the 'bytes' declaration down by two lines when you make
this change.

Thanks.