linux-kernel - Re: [PATCH] tracing: Cleanup the convoluted softirq tracepoints

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Date:	Tue, 19 Oct 2010 15:08:07 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Koki Sanagi <sanagi.koki@...fujitsu.com>,
	Ingo Molnar <mingo@...e.hu>, mathieu.desnoyers@...icios.com,
	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>, nhorman@...driver.com,
	scott.a.mcmillan@...el.com, laijs@...fujitsu.com,
	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>, eric.dumazet@...il.com,
	kaneshige.kenji@...fujitsu.com, David Miller <davem@...emloft.net>,
	izumi.taku@...fujitsu.com, kosaki.motohiro@...fujitsu.com,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	"Luck, Tony" <tony.luck@...el.com>
Subject: Re: [PATCH] tracing: Cleanup the convoluted softirq tracepoints

On Tue, 2010-10-19 at 15:00 +0200, Thomas Gleixner wrote:
> 
> With the addition of trace_softirq_raise() the softirq tracepoint got
> even more convoluted. Why the tracepoints take two pointers to assign
> an integer is beyond my comprehension.
> 
> But adding an extra case which treats the first pointer as an unsigned
> long when the second pointer is NULL including the back and forth
> type casting is just horrible.
> 
> Convert the softirq tracepoints to take a single unsigned int argument
> for the softirq vector number and fix the call sites.
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de> 

Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>

A much needed cleanup indeed!
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