From: ratheesh k <ratheesh.ksz@gmail.com>
To: hong zhang <henryzhang62@yahoo.com>
Cc: linux-c-programming@vger.kernel.org
Subject: Re: strcut casts unsigned long
Date: Fri, 13 Aug 2010 12:14:15 +0530 [thread overview]
Message-ID: <AANLkTikAiKKtzMcpt14W3veeiOe1JV57RyfG3L1L=OPh@mail.gmail.com> (raw)
In-Reply-To: <965738.16877.qm@web57908.mail.re3.yahoo.com>
On Fri, Aug 13, 2010 at 7:47 AM, hong zhang <henryzhang62@yahoo.com> wrote:
> List,
>
> I have C question on skbuff.h.
> skb->_skb_dst is defined as unsigned long and dst_entry is struct.
>
> Why strct dst_entry casts unsigned long skb->_skb_dst?
>
> See below
>
> static inline struct dst_entry *skb_dst(const struct sk_buff *skb)
> {
> return (struct dst_entry *)skb->_skb_dst;
> }
>
> Appreciate any answer!
>
> --henry
skb->_skb_dst can be a pointer to both destination cache or routing
table . We could type cast to any of those .
-Ratheesh
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next prev parent reply other threads:[~2010-08-13 6:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-13 2:17 strcut casts unsigned long hong zhang
2010-08-13 6:44 ` ratheesh k [this message]
2010-08-13 13:23 ` Javier Martinez Canillas
2010-08-13 21:25 ` hong zhang
2010-08-13 21:49 ` Javier Martinez Canillas
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