linux-kernel - Re: [RFC patch 2/5] trace event skb fix unassigned field

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Message-ID: <20110105132604.GA31831@Krystal>
Date:	Wed, 5 Jan 2011 08:26:04 -0500
From:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:	Neil Horman <nhorman@...driver.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Zhaolei <zhaolei@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [RFC patch 2/5] trace event skb fix unassigned field

* Neil Horman (nhorman@...driver.com) wrote:
[...]
> > trace event skb remove duplicate null-pointer check
> > 
> > The check for NULL skb in the kfree_skb trace event is a duplicate from the
> > check already done in its only caller, kfree_skb(). Remove this duplicate check.
> > 
> > Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
> > CC: Steven Rostedt <rostedt@...dmis.org>
> > CC: Frederic Weisbecker <fweisbec@...il.com>
> > CC: Ingo Molnar <mingo@...e.hu>
> > CC: Thomas Gleixner <tglx@...utronix.de>
> > CC: Neil Horman <nhorman@...driver.com>
> > ---
> >  include/trace/events/skb.h |    4 +---
> >  1 file changed, 1 insertion(+), 3 deletions(-)
> > 
> > Index: linux-2.6-lttng/include/trace/events/skb.h
> > ===================================================================
> > --- linux-2.6-lttng.orig/include/trace/events/skb.h
> > +++ linux-2.6-lttng/include/trace/events/skb.h
> > @@ -25,9 +25,7 @@ TRACE_EVENT(kfree_skb,
> >  
> >  	TP_fast_assign(
> >  		__entry->skbaddr = skb;
> > -		if (skb) {
> > -			__entry->protocol = ntohs(skb->protocol);
> > -		}
> > +		__entry->protocol = ntohs(skb->protocol);
> >  		__entry->location = location;
> >  	),
> >  
> > 
> > 
> Acked-by: Neil Horman <nhorman@...driver.com>

Thanks!

Mathieu

> 
> > -- 
> > Mathieu Desnoyers
> > Operating System Efficiency R&D Consultant
> > EfficiOS Inc.
> > http://www.efficios.com
> > 

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
--
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