From: Glauber de Oliveira Costa <gcosta@redhat.com>
Date: Wed, 30 Jan 2008 12:31:03 +0000 (+0100)
Subject: x86: split get_cycles_sync
X-Git-Tag: v2.6.25-rc1~1143^2~648
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4e87173eacfd0d798aeeba14026893797826bc93;p=pandora-kernel.git

x86: split get_cycles_sync

This patch splits get_cycles_sync() into  __get_cycles_sync(),
and the rdtscll part. Paravirt guests cannot issue rdtscl directly,
as it involves a function call in vdso area.

So, using the __get_cycles_sync() base, we introduce vget_cycles_sync,
which then calls the native version of rdtscll. Ideally, however, a guest
should define its own clocksource, together with a vread function

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

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