linux-kernel - Re: [PATCH 7/24] consolidate msr.h

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Message-Id: <200711202143.13460.rusty@rustcorp.com.au>
Date:	Tue, 20 Nov 2007 21:43:12 +1100
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Bastian Blank <bastian@...di.eu.org>,
	Glauber de Oliveira Costa <gcosta@...hat.com>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	glommer@...il.com, tglx@...utronix.de, ak@...e.de,
	chrisw@...s-sol.org, avi@...ranet.com, anthony@...emonkey.ws,
	virtualization@...ts.linux-foundation.org, lguest@...abs.org,
	kvm-devel@...ts.sourceforge.net, zach@...are.com,
	jun.nakajima@...el.com
Subject: Re: [PATCH 7/24] consolidate msr.h

On Tuesday 20 November 2007 17:16:45 Steven Rostedt wrote:
> On Tue, 20 Nov 2007, Ingo Molnar wrote:
> > i dont think there's ever any true need (and good cause) to force
> > integer type casts like that at the callee site.
>
> Unless you mean we should do something like this:
>
> static inline void __wrmsrl(unsigned int msr, unsigned long long val);
> #define wrmsr(msr, val) __wrmsrl(msr, (unsigned long long)var)

Heh:

union ptr_or_val {
	void *ptr;
	unsigned long long val;
};

static inline void __wrmsrl(unsigned int msr, union ptr_or_val pv);
#define wrmsr(msr, v) __wrmsrl(msr, (union ptr_or_val)v)

Ok, maybe not...
Rusty.
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