linux-kernel - [PATCH] trace event skb remove duplicate null-pointer check

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Message-ID: <20110106175319.GA30610@Krystal>
Date:	Thu, 6 Jan 2011 12:53:19 -0500
From:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Neil Horman <nhorman@...driver.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Zhaolei <zhaolei@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH] 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>
Acked-by: Neil Horman <nhorman@...driver.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: Zhaolei <zhaolei@...fujitsu.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;
 	),
 

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