From: Andi Kleen <ak@suse.de>
Date: Wed, 2 May 2007 17:27:21 +0000 (+0200)
Subject: [PATCH] x86: Use RDTSCP for synchronous get_cycles if possible
X-Git-Tag: v2.6.22-rc1~1011^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c5bcb5635a03da3158f121ae20ccbbf72b4fc62a;p=pandora-kernel.git

[PATCH] x86: Use RDTSCP for synchronous get_cycles if possible

RDTSCP is already synchronous and doesn't need an explicit CPUID.
This is a little faster and more importantly avoids VMEXITs on Hypervisors.

Original patch from Joerg Roedel, but reworked by AK
Also includes miscompilation fix by Eric Biederman

Cc: "Joerg Roedel" <joerg.roedel@amd.com>

Signed-off-by: Andi Kleen <ak@suse.de>
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