netdev - Re: [PATCH 2/3] tcp: Remove unrequired operations in tcp

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Date:	Thu, 10 Dec 2009 12:26:59 +0200 (EET)
From:	"Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi>
To:	Krishna Kumar2 <krkumar2@...ibm.com>
cc:	David Miller <davem@...emloft.net>, Netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH 2/3] tcp: Remove unrequired operations in tcp_push()

On Thu, 10 Dec 2009, Krishna Kumar2 wrote:

> "Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi> wrote on 12/10/2009 01:40:51
> PM:
> 
> > Re: [PATCH 2/3] tcp: Remove unrequired operations in tcp_push()
> >
> >
> > >  static inline void tcp_push(struct sock *sk, int flags, int mss_now,
> > >               int nonagle)
> > >  {
> > > -   struct tcp_sock *tp = tcp_sk(sk);
> > > -
> > >     if (tcp_send_head(sk)) {
> > > -      struct sk_buff *skb = tcp_write_queue_tail(sk);
> > > -      if (!(flags & MSG_MORE) || forced_push(tp))
> > > +      struct tcp_sock *tp = tcp_sk(sk);
> > > +
> > > +      if (!(flags & MSG_MORE) || forced_push(tp)) {
> > > +         struct sk_buff *skb = tcp_write_queue_tail(sk);
> > > +
> > >           tcp_mark_push(tp, skb);
> >
> > I suppose one could kill the temporary variable completely then?
> 
> I did consider that, but kept it this way for readability reasons.
> Should I change it?

Honestly that doesn't look that fuzzy code even if you'd stick it into the 
tcp_mark_push line (nor should be even close to 80 limit). ...I was even 
thinking of getting totally rid of that skb arg of tcp_mark_push as I 
think it's always tcp_write_queue_tail(sk) that is put there.

-- 
 i.