Re: [PATCH net-next RFC] virtio-net: drop rq->max and rq->num

[David Miller <davem@davemloft.net>]

From: Rusty Russell <rusty@rustcorp.com.au>
Date: Thu, 16 Jan 2014 10:25:26 +1030

> Rusty Russell <rusty@rustcorp.com.au> writes:
>> Jason Wang <jasowang@redhat.com> writes:
>>> It looks like there's no need for those two fields:
>>>
>>> - Unless there's a failure for the first refill try, rq->max should be always
>>>   equal to the vring size.
>>> - rq->num is only used to determine the condition that we need to do the refill,
>>>   we could check vq->num_free instead.
>>> - rq->num was required to be increased or decreased explicitly after each
>>>   get/put which results a bad API.
>>>
>>> So this patch removes them both to make the code simpler.
>>
>> Nice.  These fields date from when the vq struct was opaque.
>>
>> Applied,
>> Rusty.
> 
> Oops, this doesn't require any core virtio changes, so it's for DaveM:
> 
> Acked-by: Rusty Russell <rusty@rustcorp.com.au>

Jason please repost this with Rusty's ACK, thanks.