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

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Message-ID: <18953.5677.63000.658678@drongo.ozlabs.ibm.com>
Date:	Tue, 12 May 2009 16:24:45 +1000
From:	Paul Mackerras <paulus@...ba.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	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

Peter Zijlstra writes:

> Thanks, I missed that little detail.
> 
> Do we still want the new ioctl iteration flag?

Not sure; it might be useful sometimes, I guess.  We do need to clear
up the confusion about whether one does ioctl(fd, ..., flag) or
ioctl(fd, ..., &flag), and if the former we shouldn't be using _IOW,
as Arnd pointed out.

Paul.
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