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

[Paul Mackerras]

Peter Zijlstra writes:

> 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

Yep.

> In which case the below should fix things up, no?

Looks good.

Paul.
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