netdev - Re: [PATCH 14/39]: pkt_sched: Add qdisc_tx_is

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Date:	Thu, 3 Jul 2008 08:58:03 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, vinay@...ux.vnet.ibm.com,
	krkumar2@...ibm.com, mchan@...adcom.com, Matheos.Worku@....COM,
	linux-wireless@...r.kernel.org
Subject: Re: [PATCH 14/39]: pkt_sched: Add qdisc_tx_is_noop() helper and use
 in IPV6.

On Thu, 03 Jul 2008 00:03:49 -0700 (PDT)
David Miller <davem@...emloft.net> wrote:

> 
> This indicates if the NOOP scheduler is what is active
> for TX on a given device.
> 
> Signed-off-by: David S. Miller <davem@...emloft.net>
> ---
>  include/net/sch_generic.h |    8 ++++++++
>  net/ipv6/addrconf.c       |    5 ++---
>  2 files changed, 10 insertions(+), 3 deletions(-)
> 
> diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
> index 9f5e644..bfb05a7 100644
> --- a/include/net/sch_generic.h
> +++ b/include/net/sch_generic.h
> @@ -212,6 +212,14 @@ static inline bool qdisc_tx_changing(struct net_device *dev)
>  	return (txq->qdisc != txq->qdisc_sleeping);
>  }
>  
> +/* Is the device using the noop qdisc?  */
> +static inline bool qdisc_tx_is_noop(struct net_device *dev)
> +{
> +	struct netdev_queue *txq = &dev->tx_queue;
> +
> +	return (txq->qdisc == &noop_qdisc);
> +}
static inline bool qdisc_tx_is_noop(const struct net_device *dev)?

>  static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch,
>  				       struct sk_buff_head *list)
>  {
> diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
> index e6acb89..6dd8c63 100644
> --- a/net/ipv6/addrconf.c
> +++ b/net/ipv6/addrconf.c
> @@ -224,10 +224,9 @@ const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_IN
>  const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
>  
>  /* Check if a valid qdisc is available */
> -static inline int addrconf_qdisc_ok(struct net_device *dev)
> +static inline bool addrconf_qdisc_ok(struct net_device *dev)
>  {
> -	struct netdev_queue *txq = &dev->tx_queue;
> -	return (txq->qdisc != &noop_qdisc);
> +	return !qdisc_tx_is_noop(dev);
>  }

Ditto const
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