netdev - RE: [PATCH net-next] net: dpaa: remove init which already done in per-cpu allocation

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Date:   Mon, 30 Oct 2017 05:12:29 +0000
From:   "Yuan, Linyu (NSB - CN/Shanghai)" <linyu.yuan@...ia-sbell.com>
To:     Madalin-cristian Bucur <madalin.bucur@....com>,
        yuan linyu <cugyly@....com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "David S . Miller" <davem@...emloft.net>
Subject: RE: [PATCH net-next] net: dpaa: remove init which already done in
 per-cpu allocation

Hi,

devm_alloc_percpu() will allocate per-cpu memory and memset allocated block content to 0.

> -----Original Message-----
> From: Madalin-cristian Bucur [mailto:madalin.bucur@....com]
> Sent: Monday, October 30, 2017 1:08 PM
> To: yuan linyu; netdev@...r.kernel.org
> Cc: David S . Miller; Yuan, Linyu (NSB - CN/Shanghai)
> Subject: RE: [PATCH net-next] net: dpaa: remove init which already done in
> per-cpu allocation
> 
> Hi Yuan,
> 
> Can you please give more details about this change you are proposing?
> 
> Regards,
> Madalin
> 
> > -----Original Message-----
> > From: netdev-owner@...r.kernel.org
> [mailto:netdev-owner@...r.kernel.org]
> > On Behalf Of yuan linyu
> > Sent: Sunday, October 29, 2017 3:49 AM
> > To: netdev@...r.kernel.org
> > Cc: David S . Miller <davem@...emloft.net>; yuan linyu
> > <Linyu.Yuan@...atel-sbell.com.cn>
> > Subject: [PATCH net-next] net: dpaa: remove init which already done in
> > per-cpu allocation
> >
> > From: yuan linyu <Linyu.Yuan@...atel-sbell.com.cn>
> >
> > Signed-off-by: yuan linyu <Linyu.Yuan@...atel-sbell.com.cn>
> > ---
> >  drivers/net/ethernet/freescale/dpaa/dpaa_eth.c | 4 ----
> >  1 file changed, 4 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
> > b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
> > index a8d0be8..1ccc316 100644
> > --- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
> > +++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
> > @@ -2814,10 +2814,6 @@ static int dpaa_eth_probe(struct
> platform_device
> > *pdev)
> >  		err = -ENOMEM;
> >  		goto free_dpaa_fqs;
> >  	}
> > -	for_each_possible_cpu(i) {
> > -		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
> > -		memset(percpu_priv, 0, sizeof(*percpu_priv));
> > -	}
> >
> >  	priv->num_tc = 1;
> >  	netif_set_real_num_tx_queues(net_dev, priv->num_tc *
> > DPAA_TC_TXQ_NUM);
> > --
> > 2.7.4
> >