tree a69fff3138ad14a7949d979f2d2e5893c5cb77de
parent 9bccb23dc5fc2d268ab676e2d4212d29e230fd86
author Andi Kleen <ak@suse.de> 1178126841 +0200
committer Andi Kleen <andi@basil.nowhere.org> 1178126841 +0200

[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>