linux-kernel - Re: [PATCH 3/5] perf_counter: rework ioctl()s

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Message-Id: <200905120952.12847.arnd@arndb.de>
Date:	Tue, 12 May 2009 09:52:12 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 3/5] perf_counter: rework ioctl()s

On Tuesday 12 May 2009, Peter Zijlstra wrote:
> Ah, so _IO() gets an unsigned long 3rd argument.
> _IOW() treats the 3rd arg as a (type __user *) and copies the bits over
> _IOR() copies the bits back out to userspace
> _IORW() does both
> 
> In which case the below should fix things up, no?
> 

Yes, this looks good now.

Thanks,

	Arnd <><
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