linux-kernel - Re: [net-next RFC 3/8] macvtap: introduce macvtap_get

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Message-ID: <519F06D8.6030605@redhat.com>
Date:	Fri, 24 May 2013 14:21:12 +0800
From:	Jason Wang <jasowang@...hat.com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
CC:	davem@...emloft.net, mst@...hat.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [net-next RFC 3/8] macvtap: introduce macvtap_get_vlan()

On 05/23/2013 11:11 PM, Sergei Shtylyov wrote:
> Hello.
>
> On 23-05-2013 7:12, Jason Wang wrote:
>
>> Factor out the device holding logic to a macvtap_get_vlan(), this
>> will be also
>> used by multiqueue API.
>
>> Signed-off-by: Jason Wang <jasowang@...hat.com>
>> ---
>>   drivers/net/macvtap.c |   26 +++++++++++++++++++-------
>>   1 files changed, 19 insertions(+), 7 deletions(-)
>
>> diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
>> index ce1c72a..a36e49e 100644
>> --- a/drivers/net/macvtap.c
>> +++ b/drivers/net/macvtap.c
>> @@ -890,6 +890,23 @@ out:
>>       return ret;
>>   }
>>
>> +static struct macvlan_dev *macvtap_get_vlan(struct macvtap_queue *q)
>> +{
>> +    struct macvlan_dev *vlan;
>
>    Empty line wouldn't hurt here, after declaration.

Will add one line here. Thanks
>
>> +    rcu_read_lock_bh();
>> +    vlan = rcu_dereference_bh(q->vlan);
>> +    if (vlan)
>> +        dev_hold(vlan->dev);
>> +    rcu_read_unlock_bh();
>> +
>> +    return vlan;
>> +}
> [...]
>
> WBR, Sergei
>
> -- 
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