linux-kernel - Re: [patch] use __asm__ and __volatile__ in asm-x86

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Message-Id: <200706182053.04116.ak@suse.de>
Date:	Mon, 18 Jun 2007 20:53:03 +0200
From:	Andi Kleen <ak@...e.de>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Mike Frysinger <vapier@...too.org>,
	"H. Peter Anvin" <hpa@...or.com>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] use __asm__ and __volatile__ in asm-x86_64/msr.h


> asm-i386/msr.h should not be exported to userspace at all, it contains
> nothing but kernel-internal helpers.

Actually rdtsc and rdtscll and potentially rdpmc which is in there can be very 
useful in user space if you know what you're doing. Unfortunately a lot of its users don't,
but not having the include probably won't stop them either.

-Andi
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